JPS6143720B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a musical tone parameter forming device for an electronic musical instrument that forms musical tone parameters used for generating musical tone signals, and more particularly to a musical tone parameter forming device that uses calculations to form musical tone parameters that change over time. A. Description of the Prior Art An example of a musical tone parameter forming apparatus for calculating musical tone parameters that change over time is disclosed in Japanese Patent Application Laid-Open No. 78219/1983. This conventional device consists of a calculation circuit (CPU) that calculates parameter values of musical tone parameters (consisting of musical waveform data in the case shown in the above publication), and a switching clock oscillator (CPU) that instructs switching of musical tone parameters. generator
AC, DC), and the arithmetic circuit repeatedly performs arithmetic operations to form new parameter values of musical tone parameters at the cycle of the clock output from the clock oscillator. Therefore, the time change of musical tone parameters is determined by the period of the clock from the clock oscillator, and in order to change the time conditions (speed at which the musical tone parameters are changed) for the time change of musical tone parameters, the clock frequency is determined by the clock cycle from the clock oscillator. It is necessary to change the oscillation frequency of the oscillator. However, a clock oscillator with a variable oscillation frequency has a complicated configuration and has problems with the stability of the oscillation frequency, making it difficult to arbitrarily and precisely control the temporal changes in musical tone parameters (the speed at which the parameters are changed). It becomes difficult. B. Purpose and General Description of the Invention The present invention has been made in view of the above points, and it is possible to easily and precisely control the temporal change of the musical tone parameters formed on the time axis with a simple configuration. The object of the present invention is to provide a musical tone parameter forming device that has the following characteristics. In order to achieve this object, a musical tone parameter forming device according to the present invention provides a parameter forming operation that executes a parameter forming operation for forming a new parameter value of a musical tone parameter using a predetermined value corresponding to the musical tone parameter. timer means for instructing the calculation means to perform the parameter formation calculation at predetermined time intervals; and means for setting a frequency N of execution of the parameter formation calculation in the calculation means. The calculation means executes the parameter formation calculation once every N times according to the frequency N in response to the calculation timing instruction at each predetermined time interval by the timer means, and calculates the predetermined value and the Musical tone parameters that sequentially change according to predetermined time intervals and the frequency are formed. With this configuration, calculations for forming new musical tone parameters are executed at a rate corresponding to the frequency N (every N predetermined time intervals) in units of predetermined time intervals instructed by the timer means. As a result, even if the time of the timer means is kept constant, by appropriately setting the frequency N, the rate of change of musical tone parameters can be arbitrarily controlled. Furthermore, in this invention, when performing parameter formation calculations for a plurality of musical tone parameters in a time-sharing manner using one calculation means, by independently specifying the frequency N for each musical tone parameter, a common Even though the calculation means and timer means are used, the rate of change of each musical tone parameter can be arbitrarily controlled independently. C. DESCRIPTION OF EMBODIMENTS The present invention will be described in detail below based on illustrated embodiments. FIG. 1 is an overall configuration diagram showing an embodiment of an electronic musical instrument using a tone parameter forming device according to the present invention. The electronic musical instrument shown in this example has an upper keyboard UK (total of 61 keys with pitches C ₁ to C ₆ ), a lower keyboard LK (total of 61 keys with pitches C ₁ to _{C 6} ), and a pedal keyboard PK.
(total of 25 keys with pitches C ₀ to _{C 2} ), these upper keyboards
For the UK, lower keyboard LK, and pedal keyboard PK, there are two pronunciation series each for generating musical tones. In this case, for the upper keyboard UK and lower keyboard LK, set the number of sound series to "1" using the tone setting controller.
or "2" can be selected. Furthermore, regarding the pedal keyboard PK, it is not possible to switch and select the number of sound generation series, and there are always two series. A total of 16 sounding channels are prepared, and 14 of these 16 sounding channels are used for generating musical tones on the manual keyboard (UK, LK), and the remaining 2
The two channels are used to generate musical sounds for the pedal keyboard PK, and for the pedal keyboard PK,
The musical tone based only on the most recently pressed last key among the multiple pressed keys is given priority, and if this last pressed key is released, the musical tone based on the next last pressed key is given priority. It's starting to be pronounced. Therefore, the upper keyboard UK and the lower keyboard LK can simultaneously produce tones related to up to 14 pressed keys. However, if the number of sound series for the upper keyboard UK and lower keyboard LK is set to "2", only the sounds associated with a maximum of seven pressed keys can be produced on both keyboards. Regarding the pedal keyboard PK, two sounding channels are always used, but the musical tones produced by these two sounding channels relate to a single pressed key selected by the priority control. Next, the principle of forming musical tone signals of the electronic musical instrument shown in this embodiment will be briefly explained. (Principle of Formation of Musical Sound Signal) The musical sound signal in the electronic musical instrument shown in this embodiment is basically formed on the same principle as that of an electronic musical instrument of the waveform memory read-out method. In other words, an electronic musical instrument using the waveform memory read method is equipped with a frequency information memory that stores frequency information F corresponding to each key on the keyboard, and this frequency information memory is addressed by key information representing the pressed key. The frequency information F is read out, and the read frequency information F is accumulated at a constant speed to obtain an accumulated value qF (q=1, 2, 3
...), and by addressing the waveform memory that stores the amplitude values of each sample point of one cycle of the desired musical waveform with this cumulative value qF, the amplitude value of each sample point is read out to obtain a musical tone signal. It is. However, this method has a problem in that once the waveform stored in the waveform memory is fixed, the shape of the musical sound waveform read out will always be the same, making it impossible to change the timbre. Therefore, as a means to solve such problems, the frequency information F, which is the basis for forming the accumulated value qF for addressing the waveform memory (A), is changed from the middle of the accumulation to another frequency information.
F', thereby obtaining various tone waveforms from one waveform memory (patent application
52-127633, name: electronic musical instrument) and ○B waveform memory, the cumulative value qF and the cumulative value qF plus the correction value ΔL corresponding to the set tone [qF + ΔL]
By this, two waveform amplitude values P(qF) and P(qF+ΔL) with different phases obtained from the waveform memory are synthesized, and this synthesized value is used as the waveform at one sample point. A device which forms a complex musical sound waveform as an amplitude value (Japanese Unexamined Patent Publication No. 54-28118, title: musical tone signal generation circuit for electronic musical instrument) has been proposed by the same applicant as the present invention. For now, we will temporarily call the former method based on ○B the readout speed switching method, and the latter method based on ○B the readout phase switching method. In this example,
By combining both of these equations, various complex tone waveforms can be obtained. That is, in this embodiment, address information A ₁ and A ₂ for addressing the waveform memory is created in the steps described below. (a) First, musical tone parameters G [CA], G [CT],
G[LA], G[Pi], G[M ₁ ], and G[M ₂ ] are calculated. The musical tone parameter G[CA] is a parameter that determines the switching address of the address information _A1 to the waveform memory, and G[CT] is a parameter that determines the switching time of the address information _A1 . Further, G [LA] is a parameter that determines the address difference (corresponding to the above ΔL) between the regular address information A ₁ for the waveform memory and the second address information A ₂ whose phase is slightly shifted from this,
G[P ₁ ] is a parameter that determines the reference pitch of the generated musical tone. Also, G[M ₁ ] and G[M ₂ ] are
This is a parameter that weights the two waveform amplitude values read from the waveform memory using the two address information A ₁ and A ₂ and is expressed as a digital value. These various musical tone parameters G [CA] ~ G
[M ₂ ] is the calculation parameters IZm, BLm, Δm, which correspond to the tone setting information and are stored in the memory in correspondence with the type of musical tone parameters.
Tm and the calculation parameter IZs obtained by decomposing the initial touch signal at the time of key depression according to the type of musical tone parameter.
[CA], IZs [LA], IZs [CT], IZs [Pi], IZs
[M ₁ ], IZs [M ₂ ] (these are collectively referred to as initial touch data), and a modulated aftertouch signal obtained by modulating the aftertouch signal corresponding to the key press pressure with an effect modulation signal, etc. Calculation parameters MDs [CA], MDs obtained by decomposing them according to the type of musical tone parameters
[LA], MDs[CT], MDs[PI], MDs[M ₁ ],
MDs [M ₂ ] (these are collectively referred to as modulation data) are calculated in a time-sharing manner for each type of musical tone parameter. Note that this will be explained in detail later. (b) Next, based on the musical tone parameters G [CA] to G [M ₂ ] obtained in this way, the
Frequency parameters R ₁ and R ₂ that change as shown by R ₁ and R ₂ are calculated. In other words, if the variable range of musical tone parameters G [CA] and [CT] is "0 to 1023", the frequency parameter R ₁
and R ₂ are determined by the following first and second equations. R ₁ = CA/CT...(1) R ₂ = 1023-CA/1023-CT...(2) (c) Next, for the frequency parameters R ₁ and R ₂ obtained in this way, the musical tone parameter G [Pi],
Registration pitch data R [Pi] and registration foot data R for each keyboard set by the tone setting controller
[Fe], the data KD proportional to the pitch of the pressed key is taken into consideration, and the frequency parameters R ₁ ′ and R ₂ ′ corresponding to the tone setting information and the pitch of the pressed key are expressed by the following equations 3 to 4. Calculated based on the formula. R ₁ ′=R ₁ ×2{ ^A(KD+G [ ^Pi ] ^+R [ ^Pi ] ^)+R [ ^Fe ]} …(3) R ₂ ′=R ₂ ×2{ ^A(KD+G [ ^Pi ] ^+R [ ^Pi ] ^)+R [ ^Fe ]} …(4) However, A is a constant. (d) Next, the frequency parameters R ₁ ′ and R ₂ ′ obtained in this way are accumulated, and the accumulated values qR ₁ ′,
qR ₂ ′ (q=1, 2, 3...) is compared with the musical tone parameter G [CA], and depending on the comparison result, one of the accumulated values (qR ₁ ′ or
qR ₂ ′) is selected, and the musical tone parameter G [LA] is added to this selected cumulative value,
These are output as two pieces of address information A ₁ and A ₂ for the waveform memory. In other words, qR ₁ ′<
Under the condition of CA, A ₁ = qR ₁ ′ …(5) A ₂ = qR ₁ ′+G[LA] …(6) Also, under the condition of qR ₁ ′<CA≦qR ₂ ′, Address information A ₁ and A 2 shown by A ₁ =qR ₂ ′ (7) A ₂ =qR ₂ ′+G[LA] ( ₈ ) are output. (e) Next, the address information obtained in this way
Address the transformation memory by A ₁ and A ₂ ,
Sample point amplitude values Pv ₁ of two different phases,
Pv ₂ is read. Then, musical tone parameters G [M ₁ ], G regarding weighting are applied to the two sample point amplitude values Pv ₁ and Pv ₂ that have been read out.
After multiplying by [M ₂ ], these multiplied values are combined, and the combined value is used as the one-sample point amplitude value of the musical sound waveform. Therefore, if the stored content of the waveform memory is, for example, a waveform amplitude value related to a pure sine waveform, the instantaneous value (sample point amplitude value) of the finally obtained musical sound waveform Gvi(t) is expressed by the following equations 9 to 10. It is expressed by the formula. When qR ₁ ′<CA Gvi(t)=M ₁・SinA ₁ +M ₂・SinA ₂ =M ₁・SinqR ₁ ′+M ₂・Sin(qR ₁ ′+LA) …(9) qR ₁ ′≦qR ₂ ′ When =M ₁・SinA ₁ +M ₂・SinA ₂ =M ₁・SinqR ₂ ′+M ₂・Sin(qR ₂ ′+LA) …(10) In this case, the amplitude envelope of the musical sound waveform is
Among the various musical tone parameters, the musical tone parameters G[M ₁ ] and G[M ₂ ] relating to amplitude values correspond to the timbre setting information. Next, an overview of the overall configuration and operation of the electronic musical instrument shown in FIG. 1 will be explained. (Overall configuration and operation) The electronic musical instrument shown in the embodiment shown in FIG. ing. The first processor section 100 detects the pressed state of each key on the keyboard section and the tone setting state by the tone setting operator, and also generates key information and key touch information (initial touch data, after-touch data, etc.) corresponding to the pressed key state. touch data) and tone setting information corresponding to the tone setting state to the second processor section 20.
This is the part that outputs via FIFO1 for 0,
A first arithmetic unit (microprocessor) 101 that executes various arithmetic processing or detection processes according to a predetermined program; a program memory 102 that stores a predetermined program to be executed by the first arithmetic unit 101; A key switch circuit 110 in which key switches provided corresponding to each key of the keyboard section (UK, LK, PK) are connected in a matrix.
, a touch sensor circuit 120 for obtaining an initial touch signal corresponding to the key pressing speed and an after touch signal corresponding to the key pressing pressure, and an effect modulation oscillator for imparting a vibrato effect to the musical tones of the upper keyboard UK and lower keyboard LK. 130, an expression pedal switch circuit (EXP pedal switch circuit) 140 for controlling the total volume of the generated musical tones, and an initial touch signal output from the Dutch sensor circuit 120, which is weighted differently using a variable resistor or the like, to generate various signals. It is divided into calculation parameters (IZs [CA] to IZs [M ₂ ]) and output as an initial touch signal for each calculation parameter, as well as an after touch signal and effect modulation oscillator 1.
The effect modulation signal output from 30 and
A modulation circuit 1 that combines the volume control signal output from the EXP pedal switch circuit 140 with different weights using a variable resistor, decomposes it into various calculation parameters, and outputs this as a modulated aftertouch signal.
50, an AD converter (AD/C) 160 that converts the analog initial touch signal and modulated aftertouch signal output from the modulation circuit 150 into digital initial touch data and modulation data, and each keyboard (UK, LK, PK)
Registration switch circuit (hereinafter referred to as REG′N・
(abbreviated as CCT) 170, and a foot switch circuit 18 for controlling the release time of the generated musical tone.
0, and a working memory (hereinafter abbreviated as WRK memory) 190 that temporarily stores various data when transmitting and receiving various data between the first arithmetic unit 101 and each of the above-mentioned circuits or the second processor section 200. , an effect modulation oscillator 13
0 and EXP pedal switch circuits 140 are each connected to a first bus (hereinafter referred to as
Address bus ADB ₁ , which constitutes the 1st bus)
The data bus DB ₁ is coupled to the data bus DB 1 so that information is transmitted to and from the first arithmetic unit 101 . However, the first processor section 100 does not transfer various information regarding all pressed keys to the second processor section 200, but only information regarding pre-registered pressed keys. Here, the meaning of preliminary registration will be briefly explained. In this embodiment, the sound generation assignment of the pressed key to the sound generation channel described above is performed in the second
This is executed in the processor section 200, but in this case, the number of sound channels is limited to a predetermined number (16 in this embodiment), so in the second processor section 200, information on pressed keys exceeding the number of sound channels is processed. Even if a message is forwarded to me, I cannot assign a pronunciation to it and have no choice but to ignore it. That is, it is meaningless to send information on pressed keys exceeding the number of sound generation channels from the first processor section 100, and furthermore, the processing time and transfer time for creating this information is wasted. Therefore, it is necessary to limit the number of pressed key information transferred from the first processor section 100 to the second processor section 200. Due to this restriction, the first processor section 100 executes a process of preliminary registration of pressed keys, and only information regarding the pre-registered pressed keys is transferred to the second processor section 200. The total number of pressed keys to be pre-registered corresponds to the number of sounding channels, and in this embodiment, up to 14 keys can be registered for manual keyboards (UK, LK), and up to 2 keys can be registered for pedal keyboard PK. There is. Therefore, the first processor section 10
The number of pressed key information transferred from 0 to the second processor section 200 is 16 at maximum. The second processor section 200 assigns or cancels the sound assignment to the pre-registered pressed keys supplied from the first processor section 100 via the FIFO, and also processes key information regarding the pressed keys to which the sounds are assigned, and performs various calculations. Based on the initial touch data, modulation rate, and tone setting information for each parameter, various musical tone parameters G[CA] to G[ _M2 ], etc., and frequency parameters R ( _R1 , _R2 ) of the musical tone to be generated are determined. This part performs time-sharing calculations for each sound channel and each parameter, and includes a second calculation unit 201 that executes various calculation processes according to a predetermined program, and a part that performs a predetermined calculation process that the second calculation unit 201 should execute. A program memory 202 that stores programs, a calculation parameter Tm related to the calculation cycle for calculating various musical tone parameters G[CA] to G[M ₂ ], a calculation parameter IZm related to the initial value of each musical tone parameter,
Note scaling table 220, Δ, which will be described later
Address information (indirect _calculation a timbre control information table (hereinafter referred to as TCT) 210 that stores parameters), and calculation parameters BLm for note scaling for the initial values of each musical tone parameter.
Note scaling table (hereinafter referred to as NST) 220 that stores multiple types of (coefficient values)
, a Δ table 230 that stores calculation parameters Δ for each type of musical tone parameter regarding the increase/decrease values of the musical tone parameters G[CA] to G[M ₂ ] for each calculation cycle, and information regarding the number of calculations of the calculation parameter Δ. An n table 240 that stores calculation parameters n for each type of musical tone parameter, a logarithm table 250 for calculating the frequency parameters R (R ₁ , R ₂ ) mentioned above by logarithmic calculation, and An R table 260 for converting the frequency parameter logR thus calculated into a natural number, and musical tone parameters G [GA] for all sound generation channels.
Equipped with a timer 270 for regulating calculation processing time such as G [M ₂ ], and a working memory (WRK memory) 280 for temporarily storing various data necessary in the process of calculation processing, all these circuits are connected to the second bus. The bus is connected to an address bus ADB ₂ and a data bus DB ₂ that constitute a 2nd bus (hereinafter referred to as a 2nd bus), and is configured to transmit information. The third processor section 300 processes various tone parameters G[CA], G for each sound generation channel supplied from the second processor section 200 via the FIFO2.
[LA], G[M ₁ ], G[M ₂ ] and frequency parameter R
This part forms a corresponding musical tone signal based on the sound system 4, and is equipped with a third arithmetic unit, a waveform memory, etc., and the musical tone signal formed here is sent to the sound system 4.
Starting from 00, musical tones are pronounced. Furthermore, this third
The detailed configuration of the processor section 300 will be explained later. Next, the overall operation of the electronic musical instrument configured as described above will be briefly explained. First, the desired tone information is determined by the performer.
It is set to ・CCT170 of REG′N. In this state, the first arithmetic unit 101 fetches a predetermined program stored in the program memory 102, and executes the program according to the fetched program.
The tone setting information in the initial state set in the REG'N/CCT 170 is stored in a registration data area allocated in advance of the WRK memory 190, and some of this stored registration data is subjected to predetermined arithmetic processing. and process it. Then, the processed registration data and the remaining unprocessed registration data are assigned a unique discrimination code JC and transferred to the second processor section 200. When the registration data transfer process in the initial state is completed, the arithmetic process by the first arithmetic unit 101 shifts to the key press state detection process in the key switch circuit 110, that is, the play event search routine. Detects changes in the key status of the parts (UK, LK, PK). That is, the key state in the previous play event search routine and the key state in the current play event search routine are compared, and if there is a change, the type of change and the key that caused the change are detected. If the change in key state is due to a new key press operation, preliminary registration for the newly pressed key is performed, and an on-event message indicating that a new key press operation has been performed on the keyboard section, that is, an on-event message is sent. An on-event message containing a pair of discrimination code JC indicating an event, key information corresponding to a new pressed key, and initial touch data of the pressed key is transferred to the second processor section 200. In other words, when the change in the key state is related to an on event, the first arithmetic unit 101 first processes the address information from the touch sensor to capture the initial touch signal of the pressed key that caused the on event to occur. to circuit 120. Then, the touch sensor circuit 120 outputs an initial touch signal of the pressed key. This initial touch signal is then sent to the modulation circuit 15.
0, each calculation parameter (IZs [CA], IZs [CT],
IZs [LA], IZs [Pi], IZs [M ₁ ], IZs [M ₂ ]), and then converted into digital signals in AD・C160 and sent to the data bus as initial touch data for each calculation parameter. Sent to DB ₁ . Then, the first arithmetic unit 101 sends the initial touch data regarding the pressed key obtained in this way to the second processor unit 200 as an on-event message along with the key information of the pressed key. Forward. After a certain period of time, the first arithmetic unit 101 sends address information to the touch sensor circuit 120 in order to capture the aftertouch signal of the pressed key that caused the ON event. Then, the touch sensor circuit 12
From 0, an aftertouch signal of the pressed key is sent. This aftertouch signal is used in the modulation circuit 150 as the output signal of the effect modulation oscillator 130 and
It is combined with the output signal of the EXP pedal switch circuit 140 with different weights, and thereby each calculation parameter (MDs [CA], MDs [LA], MDs [CT],
It is decomposed into MDs [PI], MDs [M ₁ ], MDs [M ₂ ]). The modulated aftertouch signal decomposed into each calculation parameter is converted into a digital signal in the AD/C 160 in the same manner as the initial touch signal, and sent to the data bus DB ₁ as modulation data for each calculation parameter. . Then, the first arithmetic unit 101 uses the modulation data regarding the pressed key obtained in this way together with the key information of the pressed key and a unique discrimination code JC.
with the second modulation message.
The data is transferred to the processor section 200. On the other hand, if the change in key status is due to a key release operation, the preliminary registration for that release key is canceled and an off event message indicating that a key release operation was performed on the keyboard section, that is, an off event message is sent. An off-event message containing a pair of unique discrimination code JC indicating the release key and key information corresponding to the release key is transferred to the second processor section 200. The above-mentioned modulation data detection processing and transfer processing are executed by a subroutine called a modulation data get routine, which follows the completion of the processing by the play event search routine described above. Therefore, the arithmetic processing programs in the first processor section 100 can be roughly divided into REG'N,
Import tone setting information in CCT170,
A registration data get routine that transfers this to the second processor section 200, detects changes in key states in the keyboard section (UK, LK, PK), and cancels preliminary registration for pressed keys or preliminary registration for released keys. a play event search routine that transfers an on-event message or an off-event message corresponding to the key depression state to the second processor section 200, and a play event search routine that takes in modulation data related to the on-event;
It consists of a modulation data get routine that transfers this data to the second processor section 200. And these three subroutines are
They are linked together as one circular program. That is, after the power is turned on, the arithmetic processing program first moves to execute a registration data get routine, then moves to execute a play event search routine, and then moves to execute a modulation data get routine. When the play event search routine and the modulation data get routine have been executed a certain number of times, the routine returns to the registration data get routine. Therefore, new timbre setting information, ie, registration data, in the REG'N/CCT 170 is taken in at regular time intervals. In this case, the on/off state of the footswitch in the footswitch circuit 180 is also detected in the registration data get routine. As is clear from the above description, this first processor section 100 is an I/O processor of the first arithmetic unit 101.
A key switch circuit 110 and a touch sensor circuit 12 each coupled to the 1st path as one of the devices.
0. A process of detecting setting information and performance information in the parts operated by the performer such as the REG'N/CCT 170 and the foot switch circuit 130, processing this detected information as appropriate, and then transmitting it to the second processor section 200. It can be thought of as a state detection device that performs As described above, when various tone setting information, key information, and key touch information are transferred from the first processor section 100 to the second processor section 200, the second processor section 200 performs processing based on these information. In addition to assigning the sound to the pressed keys, the musical tone parameters G [CA] to G [M ₂ ] and the frequency parameter R for creating musical tone signals corresponding to the pressed keys are time-divided for each sound channel and for each parameter. calculate. That is, the second arithmetic unit 201 receives the predetermined discrimination code JC from the first processor section 100.
When various types of data are supplied, the program memory 20 is
The following processing is executed according to a program stored in advance in 2. (a) If the discrimination code JC is related to a key on-event, detect the pronunciation assignment status in the 16 pronunciation channels, and if there is an empty pronunciation channel, correspond to the key information related to the on-event in this empty pronunciation channel. The tone assignment is executed, and then the process moves on to calculation processing of various musical tone parameters G[CA] to G[M ₂ ], etc., for creating a musical tone signal corresponding to the key information to which the tone generation has been assigned. (a)′ If the discrimination code JC is related to a key off event, the pronunciation channel to which the sound corresponding to the key information related to the off event is assigned is released, and the sound is generated in the corresponding sound channel. A release control is executed so that the musical tones that are being played sequentially transition to an attenuated state thereafter. In this case, the release control determines the release time and release level based on the release data for each key set in REG'N/CCT and data based on the on/off status of the foot switch. (b) If the discrimination code JC is related to an on or off event of a footswitch, perform processing to control the release part characteristics of the generated musical tone selected for the electronic organ type or piano type according to its on/off state. Let's do it.
This will be discussed later. (c) If the discrimination code JC is related to modulation data, the modulation data transferred along with this discrimination code is associated with the key information assigned to the pronunciation, and the WRK is executed.
It is stored in the modulation data area of memory 280. (d) If the discrimination code JC is related to registration data, this registration data is stored in the WRK memory 280 in a predetermined order.
Store it in the registration data area. The above is the response processing of the second processor section 200 when various data are transferred from the first processor section 100.
If the JC is related to a key on or off event, processing is performed in the channel assignment routine. In this channel assignment routine, in addition to the process of assigning or canceling the assignment of key information to a sounding channel, a two-step truncation order setting control is executed. That is, when a pressed key on the keyboard section is released, in the first step, the truncation order of each sound generation channel is set in accordance with the order of key release. Then, at the stage when the release part of the musical tone corresponding to the release key is finished, the truncation order set in the previous first stage is changed to the order in which the release part of the musical tone is finished. Of this truncate control, the first stage processing is executed in the channel assignment routine, and the second stage processing is executed in the parameter calculation routine described later. By controlling the setting of the truncation order in two stages as shown here, the sound generation channels can be used efficiently. In other words, if the truncation order is set only based on the order of key release, the pronunciation channel to which the oldest released key is assigned (the pronunciation with the highest truncation order) will be On the other hand, the attenuation pronunciation of the musical tone in the pronunciation channel to which the key released later was assigned (the pronunciation channel with a lower truncation order) has not finished, and the pronunciation channel has completed. When a new key is pressed when the channel is set to a blank sound channel, this newly pressed key will be applied to the highest truncation channel for which the attenuation sound has not been completed, even though there is a blank sound channel. This causes a problem in that the attenuated sound of this sound channel is forcibly erased. Also, if the truncation order is set only based on the release end order, when a new pressed key is added under the condition that all sound channels are generating musical sounds, the truncation order will be set based only on the release end order. If you want to assign the sound of a musical note to one of the sound channels in which the key has already been released and the sound of the musical sound is in an attenuated state, the assignment ends in one of the sound channels. The problem arises that you have to wait until the In either case, there is a drawback that the efficiency in using the sound generation channels is reduced. However, by controlling the setting of the truncation order in two stages as in this embodiment, this drawback can be eliminated and the sound generation channels can be used efficiently. On the other hand, the second arithmetic unit 201 calculates various musical tone parameters G regarding musical tones to be generated in each sound generation channel based on the key information, registration data, modulation data, etc. transferred from the first processor section 100. CA] to G[M ₂ ] and the frequency parameter R are calculated. In other words, data related to basic timbres such as piano tones and flute tones (hereinafter referred to as timbre number data to distinguish this data from others) among the registration data are used to send calculation parameters IZm corresponding to this timbre number data from the TCT210. ，
Tm, BL, ADRm, Δ, ADRm, n・ADRm are read out for each type of tone parameter. TCT2
10 includes direct calculation parameters (calculation cycle data) that can be used directly as calculation parameters.
Tm, initial value IZm) and indirect calculation parameters (Δaddress pointer Δ・ADRm,n address pointer n・
ADRm, BL address pointer BL/ADRm) is stored for each type of musical tone parameter, and by being addressed by the tone number data, these direct calculation parameters Tm, IZm and indirect calculation parameter Δ corresponding to the tone number data are stored.・ADRm, n・ADRm, BL・ADRm are read for each tone parameter. Then, among the indirect calculation parameters mentioned above, NST220 is determined by the BL address pointer BL・ADRm.
The calculation parameter BLm regarding the coefficient value for note scaling is read from Δ table 230 using the Δ address pointer Δ・ADRm.
The calculation parameter Δm regarding the increase/decrease value for each calculation cycle is read from the n address pointer n·ADRm, and the calculation parameter n _n regarding the number of calculations of the calculation parameter Δm is read from the n table 240. and in this way
TCT210 and NST220, Δ table 23
Direct calculation parameters IZm, Tm, BLm, Δm, n _n read out from the 0, n table 240
, initial touch data IZa [CA] ~ IZs [M ₂ ] obtained by decomposing the initial touch signal, and modulation data MDs [CA] ~ IZs [M ₂ ] obtained by decomposing the modulated aftertouch signal. and REG′N・
Depending on the registration level data R [Lv] and registration release data R [Re] set in the CCT 170, each tone parameter ΔG [CA] to G [M ₂ ] corresponding to the pressed key is set to a sound channel. It is calculated separately and time-divisionally for each tone parameter. Then, out of the calculated musical tone parameters G[CA] to G[M ₂ ], G[CA]
and G [CT], and the registration foot data R set in REG'N/CCT170.
[Fe] and registration pitch data R
Frequency parameters R ₁ and R ₂ are calculated using [Pi] and the key code KC corresponding to the pressed key. The musical tone parameter G [CA] calculated in this way,
G[LA], G[ _M1 ], G[ _M'2 ] and frequency parameters _R1 , _R2 are processed by the third processor as a set of musical tone parameter messages with the pronunciation channel number corresponding to the discrimination code JC as the leading information. Part 300
will be forwarded to. In this case, the frequency parameters R ₁ and R ₂ are calculated based on the first equation and the second equation, respectively, but here, the division process is performed by logarithmic operation. This logarithm operation is performed using logarithm table 250 and R table 260. In other words, the first and second equations described above are equivalent to the logarithmic expressions shown in the following equations 1' and 2'. logR ₁ = logCA/logCT = logCA~logCT…(1
') logR ₂ =log(1023-CA)/log(102
3-CT) =log(1023-CA)-log(1023-CT)...(2') Therefore, for example, when calculating the frequency parameter _R1 , first calculate the musical tone parameter G[CA], from the logarithm table 250. Logarithmic value corresponding to G [CT]
LogCA and logCT are extracted, and a subtraction process of [logCA−logCT] is performed based on the extracted logarithmic values to obtain a logarithmized frequency parameter logR ₁ . Then, in the next step, a natural number frequency parameter _R1 is extracted from the R table 260 using this _logR1 . Through such arithmetic processing, the frequency parameters R ₁ and R ₂ are calculated in a short time. Therefore, the arithmetic processing program in the second processor section 200 can be roughly divided into a channel assignment routine that performs allocation and release processing for sound channels, and a module that takes in modulation data from the first processor section 100. The vibration data get routine and the first
A registration data get routine that takes in registration data from the processor section 100, a release control routine that controls the release part of a musical tone in response to the on/off state of the foot switch, and a musical tone parameter G [CA] ~ It consists of a parameter calculation routine that calculates G[M ₂ ] and frequency parameters R (R ₁ , R ₂ ). All of these routines are regulated by the timer flag of the timer 270 so that the processing time is approximately constant. As described above, musical tone parameters G[CA], G[LA], G[M ₁ ], G[M ₂ ] and frequency parameters R ₁ , R ₂ are transmitted from the second processor section 200 to the third processor section 3000. is transferred, the third processor unit 300 executes the calculation processing shown in the above-mentioned equations 5 to 10 for each sound channel based on these tone parameters, and processes up to 16
Various types of musical tone signals Gv ₁ to Gv ₁₆ are formed. and,
The formed musical tone signals Gv ₁ to _{Gv 16} are produced as musical tones by the sound system 400. Therefore, this third processor section 300 can be considered to be a tone generator that forms a musical tone signal corresponding to given parameters. The detailed configuration of the third processor section 300 will be shown and explained later. The above is an explanation of the overall structure and general operation of the electronic musical instrument shown in the embodiment of FIG. The detailed configuration and operation of each part will be explained below in order. First Arithmetic Device 101 The first arithmetic device 101 is composed of a general-purpose microprocessor, and has built-in accumulators, registers, counters, etc. as shown in Table 2 below. Note that this second table only lists what is necessary to explain the details of the arithmetic processing later.

[Table] As is well known, the program counter PGC is
Outputs address information when reading the contents from an I/O device, memory, etc. to which a specific address has been assigned in advance, or when transferring various information from the first arithmetic unit 101 to each I/O device, memory, etc. It is something to do. The index register IXr is a register in which an offset value is set to modify the address information ADRi output from the program counter PGC. When the offset value Xi in this index register IXr is set, the address information ADRi output from the program counter PGC is set. The address information ADRi to be added becomes the address information obtained by adding this offset value Xi. The A accumulator AccA and the B accumulator AccB each independently store the calculation results of a predetermined calculation program, and calculation processing other than data transfer processing is executed in combination with either one of these accumulators AccA and AccB. Ru. The parameter counter PC is used to read initial touch data and modulation data for each calculation parameter from the modulation circuit 150. The lower 3 bits _B2 to _B0 correspond to the type of calculation parameter, and the upper 3 bits correspond to the type of calculation parameter. Bits _B5 to _B9 correspond to the distinction between initial touch data and modulation data. Key switch circuit 110 The key switch circuit 110 is connected to a keyboard section (UK,
By sequentially selecting each line _l0 to _l35 of the key switch matrix 110a in which key switches provided corresponding to each key (LK, PK) are connected in a matrix, it is possible to determine which pitch corresponds to the pitch. Keyboard status information KBS indicates whether the key switch is operating or not. Each bit of the data bus DB ₁
It is configured to be obtained from D ₀ to _{D 7} . In this case, the key switch matrix 110a is
Key switch 1101 corresponding to pitch C ₁ is shown in figure b.
As shown in the enlarged connection diagram as a representative, the movable terminal side of the key switch 1101 is connected to the line _l0 of the "row" via a backflow prevention diode 1102,
It is constructed by connecting the fixed terminal side to the line _L0 of the "column". The key switch matrix 110a outputs the index numbers ix ₀ to _{ix 35} obtained by decoding the lower bit information of the address information from the first arithmetic unit 101 with the decoder 110b to the driver (open collector type) 1.
One of each line l ₀ to l ₃₅ is selected by the signal inverted at 10i ₀ to 110i ₃₅ , and this selected line (any one of l ₀ to l ₃₅ ) is in operation (closed). )), a "0" signal appears on lines _L0 to _L7 of the "column" to which the fixed terminal side of the key switch is connected, and this " ₀ " signal 3 for each bit (D ₀ to _{D 7} ) as keyboard status information KBS representing the operating status of the key switch belonging to the line (l ₀ to l ₃₅ ) corresponding to the line ₍ l 0 to l 35 ) corresponding to
It is temporarily stored in the state buffer 110c. For example, when the key switches corresponding to pitch C ₁ and pitch G ₁ among the key switches belonging to line l ₀ are in operation, when the index number ix ₀ output from the decoder 110b becomes "1", The 3-state buffer 110c has “D ₇ =
Keyboard status information KBS of “0”, D ₆ to D ₁ = “1”, and D ₀ = “0” is temporarily stored. This 3
After the keyboard status information KBS temporarily stored in the state buffer 110c is inverted inside the 3-state bus buffer 110c,
The enable signal _E2 output from the decoder 110d that decodes the upper bits of the address information from the first arithmetic unit 101 is sent to the data bus _DB1 during a period of "1". Note that the decoder 110b is enabled when the enable signal _E1 output from the decoder 110d is "1", and the decoder 110b is enabled when the enable signal E1 output from the decoder 110d is " ₁ ", and _the
Output. By the way, the key code KC (key information KC) representing each key in this electronic musical instrument is shown in Table 3 (a) to (b) below.
It is configured to be expressed as 9-bit information as shown in the figure, and the upper 2 bits of this 9-bit information are
_S8 to _B7 are defined as a keyboard code KBC that represents the distinction between keys (UK, LK, and PK), and the next three bits _B6 to _B4 are defined as an octave code OC that represents an octave. The lower 4 bits _B3 to _B0 are defined as a note code NC representing a note (pitch name).

【table】

[Table] In this case, the lower bit of the note code NC
B ₂ to _{B 0} are two notes assigned to the same chord as shown in Table 4 below, and a specific single note is expressed by the combination with the upper bit B ₃ . It's becoming like that. That is,
When expressing notes C to G, note code NC
Bit _B3 is "0", and when representing notes G# to B, bit _B3 is represented as "1". Therefore, it is divided into two groups: a group related to key notes C to G corresponding to each note key C to B, and a group related to notes G# to B, and each of these groups is divided into two groups: a group related to key notes C to G corresponding to each note key C to B _{; .about.l35} , each line _l0 to _l35 of the "row" can be sequentially selected using the upper 6 bits _B8 to _B3 of the key code KC. The index numbers ix ₀ to ix ₃₅ are information expressed by the upper six bits B ₈ to B ₃ of the key code KC under such a relationship.

[Table] By the way, in this case, the keyboard code KBC
is assigned "00" for the upper keyboard UK, "01" for the lower keyboard LK, and "10" for the pedal keyboard PK. Therefore, index numbers ix ₀ to ix ₃₅ are as shown in Table 3 (a) to
As is clear from the "Decimal Display" column in (b), ix ₀ to ix ₉ for the upper keyboard UK and ix ₁₆ for the lower keyboard LK.
~ix ₂₅ and ix ₃₂ ~ _{ix 35} for the pedal keyboard PK, which are discontinuous numbers. However, by assigning the keyboard code KBC as described above, only the upper two bits (B ₈ and B ₇ ) of the key code KC are used when determining which keyboard the key code KC belongs to. This method has the advantage of reducing program execution time since it is only necessary to perform judgment processing. In addition, the number of keys on each keyboard in this example is the upper keyboard UK and the lower keyboard LK.
A total of 61 keys, each with pitch C ₁ to _{C 6} , pedal keyboard
PK is a total of 25 keys with pitches C ₆ to _{C 2} . Therefore, if each key of one octave is divided into two groups as described above, the keys of the highest octave pitch _C6 (UK, LK) and _C2 key (PK) remain. Therefore, the C ₆ key (UK and LK) should belong to the 5th octave, and the C ₂ key (PK) should belong to the 5th octave.
is made to belong to the second octave.
(C) in Table 4 is this C ₆ key or C ₂
It represents a key. Touch sensor circuit 120 Next, the touch sensor circuit 120 describes a detailed circuit example of a touch sensor circuit related to a certain key in a fourth example.
As shown in the figure, an initial touch signal IT whose level changes according to the change in the key pressing speed and an after touch signal AT whose level changes according to the change in the key pressing pressure after the key is pressed are mixed. signal
By sampling TS at two different timings, the initial touch signal IT and the after touch signal AT can be distinguished and output to one output terminal 1.
20a. In other words, in FIG. 4, the KSW is provided for each key independently of the key switch in the key switch matrix 110a (however, it is not provided for the pedal keyboard PK), and the contact point is determined depending on the key pressing speed.
This is a key switch whose switching time from NC to contact NO changes. When common contact C and contact NO are connected by key press operation, the charging voltage of capacitor _C1 is transferred to this key switch KSW and diode _D1.
to the output capacitor _C2 . In this case, if the key pressing speed is fast and the time for the common contact C of the key switch KSW to move from contact NC to contact NO is short, the charging voltage of capacitor C ₁ will be at a high level without being affected by the discharging effect of resistor R ₁ . is transferred to the output capacitor _C2 as a charging voltage. However, if the key pressing speed is slow and it takes a long time for common contact C to move from contact NC to contact NO, the charging voltage of capacitor C ₁ will be affected by the discharging action of resistor R ₁ and will be output as a low-level charging voltage. Transferred to capacitor C ₂ . After this, when the key is completely pressed down, the voltage at the connection point between the pressure/impedance conversion element (piezoelectric rubber, etc.) Zp and the resistor R ₃ whose impedance changes depending on the key pressing pressure,
In other words, the aftertouch signal AT is applied to the output capacitor _C2 via the diode _D2 . Therefore, the charging voltage of the output capacitor C ₂ in the time period t ₁ from the start of transfer of the charging voltage of the capacitor C ₁ to the output capacitor C ₂ until the aftertouch signal AT is applied corresponds to the initial touch, The charging voltage of the output capacitor C ₂ in the subsequent time period t ₂ corresponds to aftertouch. FIG. 5 is a waveform diagram showing the output waveforms of each part in this touch sensor circuit 120. FIG. 5 a shows the on/off state of the key switch KSW, FIG. Aftertouch signal
AT is shown, and d of the figure shows an output signal, that is, a touch sense signal TS. Therefore, in the touch sensor circuit 120 configured as described above, by sampling the output voltage of the output terminal 120a at different timings, that is, at the above-mentioned time periods t ₁ and t ₂ , the output voltage can be obtained from one output terminal. Two types of touch response signals, an initial touch response signal and an after touch response signal, can be obtained, saving the number of output terminals, simplifying the wiring work, and sharing the output capacitor C ₂ and output resistor R ₂ . It is possible to create a touch sensor circuit that is economical and compact. This effect is more advantageous as the number of keys in the keyboard section increases, as in the case of the electronic musical instrument in this embodiment. By the way, in this case, the charging voltage of capacitor _C1 increases from the start of pressing the key switch KSW.
The time until the transfer to C ₂ begins, that is, the time period t ₀ shown in FIG. 5, is approximately 300 μ·sec to 1 m·sec in a normal performance mode.
Further, the above time period t ₁ is about 2 m·sec. Therefore, when the first arithmetic unit 101 detects that any key of the keyboard section (UK, LK) is pressed, it outputs an initial touch response and an after touch response regarding that key.
All you have to do is create a program to capture data within 2m・sec. Effect modulation oscillator 130, EXP pedal switch circuit 140, modulation circuit 150 Figure 6 shows the effect modulation oscillator 130 and EXP pedal switch circuit 140.
Pedal switch circuit 140 and modulation circuit 15
0 is a detailed circuit diagram showing an embodiment of the present invention, in which the effect modulation oscillator 130 includes two voltage-controlled variable frequency oscillators ( 130a and 130b (hereinafter referred to as VCO). This VCO130a, 130b
The oscillation frequency can be varied by variable resistors 1301 and 1303, respectively.
This allows the speed of the vibrato effect to be variably controlled. Further, the respective output signal levels can be varied by variable resistors 1302 and 1304, thereby variably controlling the depth of the vibrato effect. The output signal of the VCO 130a, that is, the effect modulation signal UKf for the upper keyboard UK is sent to the upper keyboard aftertouch weighting circuit 15 of the modulation circuit 150 via the switch 1501.
0c, and also the output signal of the VCO 130b, that is, the effect modulation signal for the lower keyboard LK.
LKf is connected to the modulation circuit 150 via the switch 1502.
The lower keyboard aftertouch weighting circuit 150d is supplied. Switch 1501 and 150
2 is for controlling whether or not to apply a vibrato effect to the musical tones of the pressed keys of the upper keyboard UK and lower keyboard LK, and is closed when a vibrato effect is to be applied. Since the EXP pedal switch circuit 140 is well known, its detailed circuit is not shown.
A volume control signal V _EX whose output level changes according to the operating angle of the EXP pedal is output. This volume control signal V _EX is used for the upper keyboard UK and lower keyboard LK.
Switch 1 that controls whether or not to apply the volume control effect of the EXP pedal to the musical sound of the pressed key.
Weighting circuit 15 for upper and lower keyboard aftertouches of modulation circuit 150 via 503 and 1504
0c and 150d in parallel. Note that the switches 1503 and 1504 are closed when the EXP pedal provides a volume control effect. The modulation circuit 150 receives touch sense signals TSu 1 to TSu ₆₁ , TSu ₁ to TSl ₁ to each key of the upper keyboard UK and lower keyboard LK output from the touch sensor circuit 120.
The signals corresponding to the pressed keys are selected one by one among the TSl ₆₁ , and the initial touch signal IT and after touch signal AT are time-divisionally extracted from the selected signals, and among these extracted signals, the initial touch signal IT corresponds to The musical tone parameter
[CA] to G[M ₂ ] are decomposed into calculation parameters corresponding to the types, and these decomposed calculation parameters are
The AD・C160 converts it into a digital signal in a time-divisional manner and sends it to the data bus DB ₁ as initial touch data for each calculation parameter, and the aftertouch signal AT is weighted for the upper keyboard aftertouch of the corresponding keyboard. The corresponding keyboard effect modulation signal UKf or
Musical tone parameters G[CA] to G are obtained by different weighting synthesis of LKf and volume control signal Vex.
[M ₂ ] is decomposed into calculation parameters corresponding to the type, and these decomposed calculation parameters are used in AD/C18.
0 to time-divisionally convert it into a digital signal,
This is used as modulation data on the data bus.
Configured to send to DB ₁ . In other words,
Upper keyboard output from touch sensor circuit 120
Touch sense signal for each key of UK and lower keyboard LK
TSu ₁ to _{TSu 61} and TSl ₁ to TSls ₁ are input to an analog multiplexer 150c, and one of these input signals is selected by the analog multiplexer 150e at two different timings. That is, in the initial touch signal get cycle IG ^CY , the arithmetic unit 101 uses the I/O device address of the latch 150f as the upper bit information, and uses the touch sense circuit (see FIG. 4) corresponding to the key from which the touch sense signal is to be obtained, that is, the pressed key. Outputs address information whose lower bit information is the I/O device address (shown). In this case, the I/O of the touch sense circuit for each key is
The O device address is assigned corresponding to the key information of the key. Therefore, the arithmetic device 101
For example, when trying to extract the initial touch signal and after touch signal for the _C1 key (UK), first the initial touch signal get cycle
In IG _CY , the address of the latch 150f as an I/O device is used as the upper bit information, and the key information [000000000] of the _C1 key (UK) (see Table 3 (a), (b) and Table 4) is used as the lower bit information. Outputs address information as bit information. Then address bus ADB ₁
The upper bit information of the address information sent to is decoded by a decoder 150g, and an enable signal _E1 for enabling the latch 150ff is output from the decoder 150g. This enables latch 150f and supplies the lower bit information of the address information sent to address bus _ADB1 to analog multiplexer 150e. Then, the analog multiplexer 150e selects the _C1 key (UK) assigned to the address corresponding to "000000000".
selects and outputs touch sense signals related to In this way, the analog multiplexer 15
The touch sense signal related to the _C1 key (UK) selected at 0e is supplied to the upper and lower keyboard initial touch weighting circuits 150a and 150b, and these weighting circuits 150a and 15
By being differently weighted by variable resistors VR ₁ to VR ₆ provided inside 0b, it is decomposed into each calculation parameter, and is supplied to the next stage analog multiplexer 150h. In addition, the data selected by the first-stage analog multiplexer 150e
The touch sense signal for the _C1 key (UK) is sent to the upper and lower keyboard aftertouch weighting circuits 150c and 150 via switches 1505 and 1506.
d is also supplied in parallel, where effect modulation signals UKf, corresponding to each keyboard (UK, LK) are supplied in parallel.
After being differently weighted and combined with LKf and the volume control signal V _EX and decomposed into each calculation parameter, it is supplied to the next-stage analog multiplexer 150h. However, in the next step, the first arithmetic unit 101
C Outputs address information for reading the initial touch signal of the upper keyboard UK to which the _1st key (UK) belongs in a time-sharing manner for each calculation parameter. Therefore, the analog multiplexer 150h selects and outputs only the initial touch signal for each calculation parameter belonging to the initial touch signal group UIG related to the upper keyboard UK from among the input signals. In other words, the first arithmetic unit 101 uses the I/O device address of the latch 150i as the upper bit, and uses C _{1
Keyboard code KBC} (=
Address information as shown in Table 5 below, where "00") is the next bit information and the output of the parameter counter PC for sequentially reading the initial touch signal for each calculation parameter in a time-sharing manner is the lower bit information. Send to address bus ADB ₁ .

[Table] Incidentally, the count value of the parameter counter PC and each calculation parameter are related as shown in Table 6 below.

[Table] In this case, bits _B8 to _B5 of the count output of the parameter counter PC represent information for selecting the initial touch signal group and the modulation signal group. Therefore, latch 150
When the count value of the parameter counter PC is sequentially changed from 1 to 6 (in decimal notation) while the I/O device address and keyboard code KBC of i are fixed, the decoder 150g that decodes the upper bits of the address information Latch 15
An enable signal _E2 is supplied to 0i, thereby enabling the latch 150i, and the latch circuit 150i supplies the keyboard code KBC and the sequentially changing output of the parameter counter PC as address information to the analog multiplexer 150h. , this allows the output of the analog multiplexer 150h to be output from the upper keyboard UK.
The initial touch signal for each calculation parameter regarding the _C1 key is extracted in a time-sharing manner. On the other hand, the extraction of the modulation signal for the _C1 key (UK) is performed in the same _way as the initial touch signal extraction operation in the modulation signal get cycle MG _CY , which is a certain period of time after the initial touch signal for the C1 key is extracted. , the aftertouch signal AT of the _C1 key extracted from the analog multiplexer 150e in the first stage of this modulation signal get cycle MG _CY is used for effect modulation regarding the upper keyboard UK within the upper keyboard aftertouch weighting circuit 150c as follows. Signal UKf and volume control signal V
It is combined with _EX with different weights and output as a modulation signal for each calculation parameter. First, the aftertouch signal AT related to the _C1 key (UK) extracted by the analog multiplexer 150e is transmitted to the input variable resistor of the upper keyboard aftertouch weighting circuit 150c via the switch 1505.
After being adjusted to an appropriate amplitude level by VRi ₁ , it is amplified by amplifier A ₁ and each musical tone parameter G
[CA], G [LA], G [CT], G [Pi], G
[M ₁ ] and G[M ₂ ] are supplied in parallel to weighting circuits 1511 to 1516 provided corresponding to each other. Similarly, the effect modulation signal UKf is also adjusted to an appropriate amplitude level by the input variable resistor VRi ₂ , and then amplified by the amplifier A ₂ and sent to each weighting circuit 15.
11 to 1516 in parallel. Also,
Similarly, the volume control signal V _EX output from the EXP pedal switch circuit 140 is connected to the input variable resistor.
After being adjusted to an appropriate amplitude level by VRi ₃ , it is amplified by amplifier A ₃ and sent to each weighting circuit 15.
11 to 1516 in parallel. Then,
In each of the weighting circuits 1511 to 1516, these input signals are differently weighted by variable resistors VR ₁ to VR ₃ and then combined by an amplifier _AM . The amplitude level of the output of this amplifier A _M is adjusted by an output variable resistor VR ₄ , and the output is supplied to an analog multiplexer 150h as a modulation signal for each calculation parameter. In the analog multiplexer 150h, the modulation signals for each calculation parameter are sequentially extracted one by one in a time-sharing manner and outputted in the same manner as in the case of the initial touch signal get cycle _{IG_CY} . The lower bit information of the address information when the modulation signal is extracted by the analog multiplexer 150h is shown in the lower column of Table 6. The initial touch signal and modulation signal for each calculation parameter extracted in a time-division manner as described above are converted into corresponding digital signals in the AD/C 160.
When the conversion process is completed, the AD.C 160 outputs a conversion end signal EOC (1 bit) from its output.
This conversion end signal EOC is sent to the most significant bit MSB of data bus _DB1 via 3-state bus buffer 162 which is enabled by enable signal _E4 output from decoder 150g. Then, the first arithmetic unit 101 detects that a "1" signal indicating that the analog-to-digital conversion has been completed appears in the most significant bit MSB of the data bus DB ₁ , and in the next step, the 3-state bus buffer 161 Sends address information to enable the address bus ADB ₁ . As a result, the enable signal _E5 is output from the decoder 150g, and the 3-state bus buffer 1
61 is enabled, and the initial touch signal and modulation signal converted into digital signals in the AD/C 160 are transferred to the data bus via this 3-state bus buffer 161.
Sent to DB ₁ as initial touch data and modulation data. In addition, AD・C
160 also has its own I/O device as one of the I/O devices.
O device address is assigned to it, and it is enabled by the enable signal _E3 output from the decoder 150g and executes analog-to-digital conversion processing. Registration switch circuit (REG′・
CCT) 170 REG'N/CCT 170 has a registration panel 171 equipped with various tone setting operators (push buttons, adjustment knobs) as shown in Fig. 7, although a detailed internal circuit example is not particularly shown. Various tone setting information from the pushbuttons is encoded into unique information and sent to data bus DB ₁ via the 3-state bus buffer, and various analog tone setting information from the adjustment knobs is encoded into unique information and sent to the data bus DB 1 via the 3-state bus buffer. After being converted into a signal, it is encoded into unique information and is then sent to the data bus DB ₁ via a three-state bus buffer. FIG. 7 shows an example of a registration panel 171 for setting various tone setting information used in the electronic musical instrument of this embodiment. A tone color select section 171a for setting basic tones such as for each keyboard (UK, LK, PK) and for each pronunciation series on each keyboard using the push button PB, and each keyboard (UK, LK, PK). Knob to adjust the center pitch of the musical tone generated in and the pitch difference between the pronunciation series.
Pitch select section 171b set using RB
and the pronunciation series UK1, UK2, LK1, LK for each keyboard.
2. Feet of musical notes generated in PK1 and PK2 (e.g. 16 feet, 8 feet, 4 feet...
) is set using the pushbutton PB, and the volume (level) of the sound series of each keyboard and the volume balance between the sound series (volume mixture between the first sound series and the second sound series). ratio)
and a level set section 17 where the volume balance between the upper keyboard UK and lower keyboard LK is set using the adjustment knob RB.
1d, and a release data setting section 171e for setting release data of musical tones generated on each keyboard. Upper keyboard of tone color selection section 171a
Clear pushbutton for UK and lower manual LK
The CLR can be used to cancel the timbre setting of the second sound generation series, and as a result, the number of sound generation series can be selected as either one or two series. The release data set section 171e has two pushbuttons PB and one adjustment knob RB for each keyboard.
are provided, and these two pushbuttons PB select whether the release section characteristics of the generated musical tones will be piano type or electronic organ type. When the electronic organ type is selected by operating the pushbutton PB, the release time data ΔV[Re] for determining the release time of a desired musical tone is set in an analog manner using the adjustment knob RB. In this case, even if the electronic organ type is selected using the pushbutton PB, if the adjustment knob RB is set to the position indicated by P, the release time data △V [Re] will use the same data as the piano type. . Therefore, the release data R [Re] is set to control the release part of the generated musical tone.
has three types of data patterns as shown in (a) to (c) below.

[Table] In other words, if you select the electronic organ type,
The most significant bit MSB is "0", and its lower bits represent release time data ΔV[Re] manually set using the adjustment knob RB. In this case, if the adjustment knob is set to the P position, all bits including the most significant bit LSB will be "0", and if it is not in the P position and the value is 0 or more, the least significant bit LSB will always be "0". 1”. On the other hand, when the piano type is selected, the most significant bit MSB is always "1", the other bits are not given any valid meaning, and the overall value is negative. In addition, when the above-mentioned data patterns are shown in (b) and (c), that is, in the case of a piano type, fixed data stored in advance in the memory is used as the release time data ΔV[Re]. Incidentally, the characteristics of the release section selected for the piano type or electronic organ type are further controlled by the on/off state of the foot switch when the key is released. In other words, as shown in the release section characteristics table below, when the piano type is selected and the foot switch is on, the musical tone corresponding to the released key will be played as if the key had not been released. hold the level,
After that, when the foot switch turns off, the fixed release time data △V [Re]
It is sequentially attenuated based on Further, when the piano type is selected and the foot switch is in the OFF state, musical tones corresponding to the release key are attenuated sequentially based on fixed release time data ΔV[Re]. On the other hand, when the release section characteristic is selected as electronic organ type, the release time data △V [Re] is set with the adjustment knob RB, and the foot switch is on, the musical tone corresponding to the release key will be adjusted as described above. Attenuates sequentially based on release time data △V [Re] set with knob RB. However, in this case, when the adjustment knob RB is set at position P, the release time is sequentially attenuated based on the fixed release time data ΔV[Re]. Further, when the release section characteristic is selected as electronic organ type and the foot switch is in the OFF state, musical tones corresponding to the release key are attenuated sequentially based on fixed release time data ΔV[Re].

[Table] Footswitch Circuit 180 Since the footswitch circuit 180 is well known, a detailed circuit is not shown, but the footswitch circuit 180 provides on/off information (1 bit:
(ON = "1", OFF = "0") is sent to the data bus DB ₁ via the 3-state bus buffer. Working memory (WRK memory) 190 Next, the WRK memory 190 is composed of well-known memory elements such as RAM, and a part of the memory area is used to store registers as shown in Table 7 below. is ensured.

【table】

[Table] Registration register RGNr ₁ to RGNr ₃₅
is a register for temporarily storing various registration data read from REG'N/CCT170, and each of these registers RGNr ₁
~RGNr The registration data temporarily stored in ₃₅ is allocated as shown in Table 8 below. In addition, in Table 8, each keyboard (UK, LK,
Registration level data regarding the pitch and registration level data regarding the pitch of the PK) are stored in two areas (RGNr ₁
~RGNr ₁₂ and RGNr ₁₃ ~RGNr ₂₅ ) are reserved, but registers RGNr ₁ to RGNr ₁₂ are for temporarily storing registration pitch data and registration level data that have been subjected to predetermined processing. Yes, registers RGNr ₁₃ to RGNr ₂₅ are
There is a device for temporarily storing raw registration pitch data and registration level data read from the REG'N/CCT 170. Details of processing the registration pitch data and registration level data will be described later.

【table】

[Table] The foot switch flag register FFGr is used to temporarily store the on/off state of the foot switch. Registration search counter RSC is
This counter functions as a type of timer for reading registration data from the REG'N/CCT 170 at regular intervals. Key-on files KOF ₁ to KOF ₁₄ are for the upper keyboard.
This is a register in which the key codes KC for UK and LK are stored by the pre-registration process. Pedal key-on file PKFa and PKFb
is a register in which the key code KC related to the pedal keyboard is stored through preliminary registration processing, and in total, there are 16 key-on files in the first processor section 100, including the 14 key-on files KOF ₁ to KOF ₁₄ described above. KOF is set up. This corresponds to a simultaneous polyphony of 16. The key-on file search counter KFC selects the 14 key-on files KOF ₁ to
It is used to detect the memory contents of KOF ₁₄ and to register a new key code KC. Priority flag register PFGr is used when performing preliminary registration processing regarding pedal keyboard PK.
This is a register in which a flag indicating a priority state for priority control is stored. keyboard old status register
KBOSr ₀ to KBOSr ₃₅ are registers that store key states in the keyboard section detected in the previous play event search routine in correspondence with the above-mentioned index numbers ix ₀ to _{ix 35} . There are a total of 24 types of index numbers ix ₀ to ix ₃₅ as shown in Table 3 (a) to (b) above. Therefore, this keyboard old status register KBOSR ₀ ~
KBOSr ₃₅ also has these 24 types of index numbers ix ₀
It consists of 24 registers corresponding to ~ix ₃₅ . Keyboard new status register KBNSr
is one of the index numbers ix ₀ to _{ix 35}
key switch matrix 11 specified by
This is a register that temporarily stores the newest key state in the line (l ₀ to _{l 35} ) of the row 0a, that is, the keyboard new status. The note number register NNr is a 3-bit register used to create the note code NC of the pressed key.The contents of this note number register NNr are used as the lower bits, and the index number is
Key code KC is created by combining ix as the upper bit. The key code KC created in this way is temporarily stored in the key code register KCr. The above is a detailed description of the configuration of each part constituting the first processor section 100. The operation of the first processor unit 100 will be described in detail below in accordance with the calculation program stored in the program memory 102. 8a to 14 show the first processor section 10.
2 is a flowchart showing an example of an arithmetic program in 0. Note that explanations of the abbreviations used in each frochart in this example are shown in Table 9 below.

[Table] First, the main routine shown in FIGS. 8a to 8b will be explained. As described above, this main routine is broadly divided into a registration data get routine, a play event search routine, and a modulation data get routine. The operation of each step will be explained below. (Step 1000) When the electronic musical instrument is powered on by the performer, first, in step 1000, the stored contents of the memory, registers, etc. in all circuits are cleared.
The first processor section 100 is in an initial state. Thereafter, the performer performs tone setting operations using various tone setting operators in the REG'N/CCT 170 to obtain a desired musical tone. (Step 1001) In response to the performer's tone setting operation, REG'N.
Initial state of registration data output from CCT170 and foot switch circuit 1
Data representing the on/off state outputted from 80 is stored in WRK memory 190. The various registration data in this case are stored as raw data in the registration registers RGNr ₁₃ to RGNr ₃₅ as shown in Table 8 above.
Specifically, the process for importing 28 types of registration data as a whole involves sequentially acquiring I/O device address information corresponding to each type of registration data from the program counter PGC of the first processing unit 101. This is done by sending. Therefore, this step 1001 is composed of a plurality of instruction groups. (Step 1002) In this step 1002, step 1002
1 for each registration register RGNr ₁₃ ~
Among the raw registration data temporarily stored in the RGNr ₃₅ , pitch-related data, that is, center pitch data for each key (P [Piu], R
[Pil], R[Pip]) and pitch difference data between the pronunciation series on each keyboard (R[DTu], R
[DTl], R[DTp]) Registration pitch data R for each tone sequence of each keyboard
[[Piu ₁ ], R[[Piu ₂ ], R[[Pil ₁ ], R[[Pil _2]
],
R[[Pip ₁ ] and R[[Pip ₂ ] are calculated. The registration pitch data R [[Piu ₁ ] to R[[Pip ₂ ]] for each tone series of each keyboard are calculated using the following equations 13 to 18.
Calculated by the formula. R[Piu ₁ ]=R[Piu]+R[DTu]…(13) R[Piu ₂ ]=R[Piu]−R[DTu]…(14) R[Pil ₁ ]=R[Pil]+R[DTl] ] …(15) R[Pil ₂ ]=R[Pil]−R[DTl]…(16) R[Pip ₁ ]=R[Pip]+R[DTp]…(17) R[Pip ₂ ]=R[ Pip]-R[DTp]...(18) The registration pitch data for each tone series of each keyboard calculated in this way is stored in the registration registers RGNr ₁ to RGNr ₆ whose storage areas are determined in advance. (See Table 8). (Step 1003) In this step 1003, step 10
In the same way as 02, the registration level data R [Miu ₁ ], R for each tone series of each keyboard
[Miu ₂ ], R[Mil ₁ ], R[Mil ₂ ], R[Mip ₁ ], R
[Mip ₂ ] is calculated. In other words, the registration level data R[Miu ₁ ] to R[[Mip ₂ ] for each sound series of each keyboard are the registration level data R for each keyboard.
[Miu], R [Mil], R [Mip] and upper keyboard UK
Mixed level data between pronunciation series R [MXu], Mixed level data R [MXl] between pronunciation series of lower keyboard LK,
Pedal keyboard PK sound series mixed level data R
[Mxp] is calculated by the following equations 19 to 24 based on the balance data R [BL] between the upper keyboard UK and the lower keyboard LK. R[Miu ₁ ] =R[Miu]+R[Mxu]+R[BL]…(19) R[Miu ₂ ] =R[Miu]−R[Mxu]+R[BL]…(20) R[Mil ₁ ] =R[Mil]+R[Mxl]-R[BL]...(21) R[Mil ₂ ] =R[Mil]-R[Mxl]-R[BL]...(22) R[Mip ₁ ]=R[ Mip]+R[Mxp]...(23) R[Mip ₂ ]=R[Mip]-R[Mxp]...(24) Registration level data R for each tone series of each keyboard calculated in this way Miu ₁ 〕〜
R [Mip ₂ ] is stored in each of the registration registers RGNr ₇ to RGNr ₁₂ whose storage areas are determined in advance (see Table 8). (Step 1004) In this step 1004, REG'N・CCT1
Various raw registration data read from 70 and stored in registration registers RGNr ₂₆ to RGNr ₃₅ and the step 10
Registration pitch data R [Piu ₁ ] ~ R [Pip ₂ ], registration level data R [Miu ₁ ] ~ R processed in 02, 1003
[Mip ₂ ] is assigned a unique identification code JC as registration data in the initial state, and is stored in FIFO 1 as a series of registration messages.
The data is transferred to the second processor section 200 via the. Here, the discrimination code JC in this embodiment is expressed by 8-bit information, and the meaning of each bit information is defined as shown in Table 10 below. Therefore, in step 1004, a determination code JC of "10010000" indicating that the data that follows in sequence is registration data is first transferred as the head information, and then various registration data are sequentially transferred. be transferred. In this case, various types of registration data are transferred in accordance with a predetermined transfer order as shown in Table 11 (Parts 1 to 3) below.

【table】

【table】

【table】

【table】

[Table] (Step 1005) When the registration data transfer process in the initial state of the REG'N/CCT 170 is completed as described above, the program then proceeds to the play event search routine and the modulation data get routine. However, before transitioning to these routines,
Periodic data for reading the registration state in the REG'N.CCT 170 at regular intervals is set in the registration search counter RSC in step 1005. In this embodiment, "140" is set as periodic data in the registration counter RSC. The periodic data "140" set in the registration counter RSC is sequentially decremented by one count each time a play event search routine 1008 and a modulation data get routine 1009, which will be described later, are executed once. (Steps 1006-1007) In this step 1006, REG'N・CCT1
It is detected whether the registration at 70 has subsequently changed. if,
If the registration has changed, the program branches to step 1007 and proceeds to step 1012 (FIG. 8b) via terminal 2 to update the new state of the registration. Conversely, if there is no change in the registration, the program branches at step 1007 to a play event routine shown at step 1008. The process of detecting this registration change is the registration register
Find the exclusive OR of each registration data stored in RGNr ₁₃ to RGNr ₃₅ and each corresponding type of registration data sequentially read from REG'N/CCT 170 by the microstep of step 1006. This is achieved by That is, when the corresponding types of comparison data are different, the execution result of the exclusive OR is "1", and in the opposite case, it is "0". Therefore, the program branching at step 1007 is executed based on the execution result of this exclusive OR. (Step 1008) As a result of executing the program in step 1006, if there is no change in the content of the registration, the program returns to step 1.
The process moves to the execution of play event search 008. As described above, this play event search routine detects a change in the key state in the keyboard section, executes preliminary registration processing for a newly pressed key and deregistration processing for a released key, and also performs preliminary registration processing for a newly pressed key and cancellation processing for a released key. This routine performs a process of transferring a corresponding on-event message or off-event message to the second processor section 200. This play event search routine can be roughly divided into a manual event search routine that executes the above various processes on the manual keyboard (upper keyboard UK, lower keyboard LK), and a manual event search routine that executes the various processes described above for the manual keyboard (upper keyboard UK, lower keyboard LK), and a manual event search routine that executes the various processes described above for the manual keyboard (upper keyboard UK, lower keyboard LK)
It consists of a pedal event search routine that executes the above-mentioned various processes in PK, and a foot switch search routine that detects the on/off state of the foot switch. In this case, the on/off state of the foot switch is detected separately from the registration data get routine because the foot switch is frequently operated. This play event search routine will be explained in detail later based on the flowcharts shown in FIGS. 9 to 13e. (Step 1009) In the modulation data get routine of step 1009, a process is executed to extract from the modulation circuit 150 the modulation data related to the pressed key that was preliminarily registered in the play event search routine of step 1008. Ru. The extracted modulation data regarding the newly pressed key is attached with a unique discrimination code ("10100000": Table 10), and is sent to the second processor section 2 as a series of modulation messages.
Transferred to 00. (Steps 1010-1011) When the play event search routine and the modulation data get routine are completed in this way, in step 1010 the contents of the registration search counter RSC are decremented by one count value. That is, each time the program execution moves to step 1010, the contents of the registration search counter RSC are sequentially decremented. If the new content of the registration search counter RSC is "0", the program returns to step 1005 by branching from step 1011. if,
If the new content of the registration search counter RSC is not “0”, that is, step 1
If the number of executions of steps 008 to 1009 has not reached the initial value of "140", the program branches to step 1011 and returns to step 1008. Therefore, in this embodiment, the registration data is sampled once for every 140 executions of the play event search routine and the modulation data get routine. And step 10
As a result of executing the program 06, if there is a change in the registration, proceed to step 1 shown in Figure 8b.
The process moves to registration update processing from 012 to 1015. (Steps 1012 to 1015) These steps 1012 to 1015 are registration update processing, that is, step 100.
As a result of executing the program in step 6, if a change in the registration data is detected, the memory contents of registration registers RGNr ₁₃ to RGNr ₂₅ are updated to a new state, and the registration data in the new state is updated. This is a program that performs processing to transfer data to the second processor section 200. That is, in step 1012, the new registration state is stored in registration registers RGNr ₁₃ to RGNr ₃₅ .
Next, in step 1013, similar to step 1002 described above, the pitch data is calculated,
Further, in the next step 1014, level data is calculated, and the processed registration pitch data and registration level data are temporarily stored in predetermined registration registers RGNr ₁ to RGNr ₁₂ . These registration data are then transferred to the second processor section 200 in the same manner as in step 1004 described above. When such registration update processing is completed, the program shifts to execution of the play event routine at step 1008 via terminal 3. Note that in the play event search routine and the modulation data get routine, the first processor section 100 to the second processor section 20
The on-event messages, off-event messages, and modulation messages for each key that are transferred to 0 are such that various types of data are sent in a predetermined transfer order, as shown in the transfer message examples in Table 12. ing. i.e. upper keyboard
Regarding on-event messages for the UK and lower keyboard LK, the unique discrimination code JC is the first data, and then the key code KC and the initial touch data for each calculation parameter are transferred in this order. Also,
For the off-event messages of the upper keyboard UK and lower keyboard LK, and the on-event messages and off-event messages of the pedal keyboard PK, the unique discrimination code JC is used as the first data, and then the key code KC of the corresponding key is transferred in order. . Also, the upper keyboard
For modulation messages for UK and lower keyboard LK, the unique discrimination code JC is used as the first data, and thereafter the key code KC and the modulation data for each calculation parameter are transferred in order.
Further, for the foot switch on-event message and off-event message, only the unique discrimination code JC is transferred.

[Table] (Play Event Search Routine) Next, the play event search routine will be explained in detail based on the flowcharts shown in FIGS. 9 to 13c. When the execution of the program in the main routine shifts to the play event search routine, first, in step 1020 in FIG. 9, "0" is set as an initial value in the index register IXr provided inside the first arithmetic unit 101. .
That is, the index register IXr contains the decoder 110 of the key switch circuit 110 (FIG. 3a).
"0" is set as an initial value for sequentially outputting index numbers ix ₀ to _{ix 35} from index number b. After this, the first arithmetic unit 101 starts the program counter.
The output of PGC is sent to address bus ADB ₁ as upper address information and the output of index register IXr as lower address information. Then, the index number ix ₀ is output from the decoder 110b, and the keyboard status information KBS indicating the key states of notes C to G in the first octave of the upper keyboard UK is transferred to the 3-state bus buffer 1.
It is temporarily stored in 10c. The keyboard status information KBS temporarily stored in the 3-state bus buffer 110e is stored in the A accumulator as the keyboard new status information KBNS in the first step of the manual event search routine in step 1021.
It is loaded into AccA and then compared with the keyboard old status information KBOS. Then, in the comparison result, index register IXr
If the key state in the octave specified by the content of is different from the key state in the previous play event search routine, it is detected which key state change the difference is caused by, and a new key state is detected. If the key state changes due to a key press, create a key code KC corresponding to the pressed key and create a key-on file for this key code KC.
After processing such as registration to KOF ₁ to KOF ₁₄ is executed, an on-event message regarding this pressed key is transferred to the second processor section 200. on the other hand,
If the change in key status is due to a new key release operation, the key code KC corresponding to this key release is deregistered from key-on files KOF ₁ to KOF ₁₄ , and then the key release operation is The related off-event message is transferred to the second processor unit 200. This manual event search routine will be described later using detailed flowcharts shown in FIGS. 10a and 10b. In this way, when the detection process for the keys of notes C to G in the first octave of the upper keyboard UK belonging to the group with index number ix ₀ is completed,
Execution of the program moves to the next step 1022, where the contents of index register IXr are incremented. In other words, "1" is added to the content "0" of index register IXr by the instruction "(Ixr)←(IXr)+1", and this added value "1" becomes the new content of index register IXr. . In this way, the contents of index register IXr are updated, and the state of the key belonging to the octave (group) specified by the updated contents of index register IXr is detected.
In this case, the updated index register IXr
In the next step 1023, it is determined whether the content "ix ₁ " is within or outside the range of index numbers "ix ₀ to ix ₉ " which correspond to the key state detection process in the upper keyboard UK. Ru. That is, in step 1023, the command "(IXr)-10=0?"
is executed, and the content "ix ₁ " of the index register IXr updated in step 1022 becomes "ix ₁ <
10'', that is, when ix ₁ = ix ₀ to ix ₉ , the program execution branches to step 1023, and the process of detecting the key status in the upper keyboard UK is assumed to have not been completed, and the program returns to step 1023. 1
The process returns to the manual event search routine of 021. Conversely, the content of index register IXr updated in step 1022 is “ix ₁ ”.
If ix ₁ =10, the process branches to step 1023, assuming that all key state detection processing in the upper keyboard UK has been completed, and the process moves to the next step 1024. When the execution of the program moves to step 1024, the index register IXr contains index numbers ix ₁₆ to ix, which are responsible for detecting the key state on the lower keyboard LK.
The initial value "16" corresponding to "ix ₁₆ " of ix ₂₅ is set by the instruction "(IXr)←16". Thereafter, the program execution moves to the next step 1025, a manual event search routine, where the key state detection process for each key in the lower keyboard LK is executed in the same manner as in the case of the upper keyboard UK. When the detection process using a certain index number "ix ₁ " is completed, the execution of the program moves to the next step 1026, and the increment instruction "(IXr) ←
(IXr)+1" is executed, thereby updating the index number ix ₁ . The updated content ``ix <sub>1</sub> '' of index register IXr is updated to the lower keyboard in the next step 1027.
It is determined whether the index number is within or outside the range of the index number "ix <sub>16</sub> to ix <sub>25</sub> " which corresponds to the key state detection process in LK. In other words, the upper keyboard
As in the UK case, the instruction "(IXr)-26=0?" is executed in step 1027, and step 10
Index register IXr updated in 26
If the content ``ix ₁ '' is ``ix <sub>1</sub> <26'', that is, ``ix ₁ = ix ₁₆ ~ ix ₂₅ '', the program execution branches to step 1027 and the key state detection process for the lower keyboard LK has not yet been performed. Assuming that all the steps have not been completed, the process returns to step 1025, the manual event search routine. Conversely, if the content ``ix <sub>1</sub> '' of the index register IXr updated in step 1026 is ``ix ₁ = 26'', the program execution branches to step 1027, indicating that all key state detection processing for the lower keyboard LK has been completed. As such, the process moves to the next step 1028. When the program execution moves to step 1028, in this step 1028, index register IXr contains index numbers ix32 to _ix32 , which are responsible for detecting the key state of the pedal key PK.
The initial value "32" corresponding to "ix ₃₂ " of ix ₃₅ is set by the instruction "(IXr)←32". After this, the program execution moves to the next step 1029, a pedal event search routine, where the key state detection process for each key in the pedal keyboard PK is executed in the same way as in the case of the upper keyboard UK and lower keyboard LK. . Then, when the detection process using a certain index number "ix ₁ " is completed,
Execution of the program moves to the next step 1030, where the increment instruction "(IXr)←(IXr)+1" is executed, thereby updating the index number _ix1 . In the next step 1031, it is determined whether the updated content "ix ₁ " of the index register IXr is within the range of index numbers "ix ₃₂ to _{ix 35} " which corresponds to the key state detection process in the pedal keyboard PK. It is determined whether it is outside. In other words, the upper keyboard
Step 10 as for UK and lower manual LK
In step 1030, the instruction "(IXr)-36=0?" is executed, and if the content "ix ₁ " of the index register IXr updated in step 1030 is "ix ₁ <36", that is, "ix ₁ = ix ₃₂ ~ ix ₃₅ '', the program execution branches to step 1031, and the process of detecting the key status in the pedal keyboard PK is at the end.It is assumed that the process of detecting the key state in the pedal keyboard PK has not yet been completed, and the program execution returns to step 1029.
The pedal event search routine is returned to. Conversely, the content "ix ₁ " of index register IXr updated in step 1030 becomes "ix ₁ =
36", the program is executed at step 103.
1 branch, it is assumed that all key state detection processing on the pedal keyboard PK has been completed, and the process moves to the next step 1032, a foot switch search routine. The pedal event search routine of step 1029 will be described later based on the detailed flowchart shown in FIGS. 13a to 13c. When the program execution moves to the foot switch search routine in step 1032 as described above, in this foot switch search routine, the current foot switch
The off state is read from the foot switch circuit 180, and the current on/off state of the foot switch is read, and the flag indicating the on/off state of the foot switch is read in the registration data get routine and stored in the foot switch flag register FFGr. are compared. As a result of the comparison, if the on/off state of the footswitch has changed, the contents of the footswitch flag register FFGr are updated to the newly read flag representing the current on/off state. Conversely, if the foot switch is turned on or
If there is no change in the off state, there is no need to update the contents of the foot switch flag register FFGr, and the program returns from the play event search routine to the main routine. Note that when the contents of the footswitch flag register FFGr are updated, an on-event message or an off-event message of the footswitch corresponding to the new state is transferred to the second processor section 200. (Manual Event Search Routine) Next, the manual event search routine will be explained. Figures 10a-b are detailed flowcharts illustrating one embodiment of the manual event search routine. This manual event search routine is executed when performing the key state detection process and preliminary registration process on the upper keyboard UK or lower keyboard LK, as described above. That is, step 1020 or 10 of the play event search routine described above.
When the execution of the instruction No. 24 is completed, the execution of the program shifts to the manual event search routine shown in FIGS. 10a and 10b. When the program execution moves to the manual event search routine, first, step 1040 is executed.
The instruction “AccA)←KBNS<IXr>” is executed. In other words, the keyboard new status information KBNS of the octave specified by the contents of index register IXr is stored in the key switch circuit 11.
0 (3-state bus buffer 110c in Figure 3a)
is read into the A accumulator AccA. Now, let's assume that the keyboard old status information KBOS that was read when the index number ixr was "ix _i " in the previous manual event search routine and is stored in the keyboard old status register KBOSr, and the index number in the current manual event search routine. Keyboard new status information read into A accumulator AccA when ix _r is “ix _i ” KBNS
Assume that the contents of each are as shown in Table 13 below.

[Table] Next, in the next step 1041, the keyboard old status information KBOS and the keyboard new status information KBNS regarding the octave specified by index number ix _i are compared to detect a change in the key status. The contents corresponding to index number ix _i of register KBOSr are stored in B accumulator.
Loaded into AccB. And next step 1
At 042, exclusive OR processing is performed between the contents of the A accumulator AccA and the contents of the B accumulator AccB, and the comparison result is stored in the B accumulator AccB. In other words, if the keyboard old status information KBOS and the keyboard new status information KBNS are as shown in Table 13 above, when the exclusive OR processing in step 1042 is executed, the B accumulator AccB has the following information. Comparison result information as shown in Table 14 is stored.

[Table] When the contents of the B accumulator AccB indicate a positive value after executing the exclusive OR process, this indicates that the key state of the octave has changed. Conversely, the fact that the contents of the B accumulator AccB after executing the exclusive OR process indicates a value of "0" indicates that the key state of the octave has not changed. In this way, a change in the key state in the octave specified by index number ix _i is detected, but if there is a change in the key state, the next step 1043 branch instruction ``(AccB)
=0? ” to execute the program at step 10.
44. Conversely, if there is no change in the key state, the branch instruction "(AccB)=
0? '' causes the program to proceed to step 1022 of the play event search routine (FIG. 9). As a result of the exclusive OR processing in step 1042,
If there is a change in the key state in the octave specified by index number 1x _i , that is, if there is an event, program execution moves to step 1044.
In this step, the contents of the keyboard old status register KBOSr corresponding to the octave are updated. The latest keyboard news status information KBNS regarding the octave is stored in the A accumulator by executing step 1040.
Stored in AccA. Therefore, the process of updating the contents of the keyboard old status register KBOSr is performed by _executing the transfer instruction "(KBOSr)<IXr>←( This is achieved by executing ``AccA)''. Then, the keyboard new status information KBNS stored in the A accumulator AccA is transferred to the keyboard old status register by the transfer command "(KBNSr)←(AccA)" in the next step 1045.
It is also transferred to KBNSr and stored there. The reason why the contents of the A accumulator AccA are transferred to the keyboard new status register KBNSr is whether the change in key state is an on event due to a new pressed key in the process described later, or an off event due to a new key release operation. This is because it is necessary to make a judgment. Next, in order to detect the key code KC related to the "event present" result obtained as described above, first, in step 1046, the 3-bit note number register NNr and the instruction "(NNr)←0" are detected.
Cleared by . And next step 1
In step 047, the contents of the B accumulator AccB are shifted to the right by one bit (MSB→LSB), and it is determined in the next step 1048 whether or not a BORO is output from the B accumulator AccB as a result of this right shift. Ru. If a borrow occurs from the B accumulator AccB as a result of the right shift, it is determined that an "event has occurred" and the program execution moves to step 1051; conversely, if a borrow does not occur,
It is determined that there is no event, and the program execution moves to step 1049. In other words,
The step 104 is applied to the B accumulator AccB.
If the contents shown in Table 14 are stored as a result of the exclusive OR processing in step 2, then if the contents of this B accumulator AccB are shifted to the right by 1 bit, the results are shown in the following Table 15. The result will be as shown below, and no borrow will occur.

[Table] Therefore, the execution of the program moves to step 1049 by the branch instruction "Borrow?". Then, in this step 1049, the above-mentioned
The contents of the keyboard new status register KBNSr, which compares the contents shown in Table 13, are 1.
Shifted to the right by one bit. This step 104
By executing the right shift command 9, the contents of the keyboard new status register KBNSr become as shown in Table 16 below.

[Table] Next, the contents of the note number register NNr are incremented to "1" by the increment command "(NNr)←(NNr)+1" in step 1050. Note number register NNr
Changing the contents of ``0'' to ``1'' means that the result of ``Event exists'' in step 1043 corresponds to the index number ix <sub>i</sub> (for convenience of explanation, this ix <sub>i</sub> will be referred to as ``ix _0' '). (i=0)
The line l ₀ of the row of the key switch matrix 110a specified in
C located at the intersection of and column line L ₁
# This means that the process has started to detect whether a change in the state of _one key is a factor.
Therefore, the program execution starts again at step 10.
47, the contents of the B accumulator AccB are shifted to the right by one bit. However, since the contents of the B accumulator AccB are "00000100" as shown in Table 15, no borrow occurs, and the result of "Event" in step 1043 corresponds to the state change of the C# ₁ key. It turns out that this is not the cause. Therefore, the program execution moves to steps 1049 and 1050 again, and in step 1049, the contents of the keyboard new status register KBNSr are shifted to the right by 1 bit to become "00000011", and in step 1050, the contents of the keyboard new status register KBNSr are shifted to the right. register
Increment the contents of NNr and set the contents to "2". As a result, the program determines that the result of "Event" in step 1043 is caused by the state change of the _D1 key located at the intersection of the row line _L0 and the column line _L2 of the key switch matrix 110a. The process begins to detect whether or not it is the same. In other words, as in the case of the C# ₁ key, the B accumulator is stored in step 1047.
The contents of AccB are shifted to the right by one bit, and it is determined in step 1048 whether a borrow occurs as a result of the right shift. However, due to the previous right shift process, the contents of B accumulator AccB are
Since it is "00000010", no borrow occurs, and the execution of the program shifts to steps 1049 and 1050 three times by the branch instruction "Borrow?". Then, in step 1049, the contents of the keyboard new status register KBNSr are shifted to the right by one bit to make the contents "00000001", and in step 1050, the contents of the note number register NNr are incremented to make the contents "3". do. This causes the program to step 1043.
The result that "event exists" is the row line l ₀ and the column line L ₂ of the key switch matrix 110a.
A process is started to detect whether or not a change in the state of the D# ₁ key located at the intersection with the D#1 key is one of the factors. That is, as in the previous process, the contents of the B accumulator AccB are shifted to the right by the right shift command in step 1047, and it is determined in step 1048 whether or not a borrow occurs as a result of this right shift. Then, the contents of the B accumulator AccB are changed to "00000001" by the right shift process up to the previous time.
Therefore, a borrow occurs, and it is determined that an "event has occurred", and the process moves to the next step 1051. That is, it can be seen that the change in the state of the D# ₁ key is also involved in the result of "event occurred" in step 1043. For this reason,
Program execution moves to step 1051,
At this time, the contents of index register IXr “ix ₀ =
0” and the content of note number register NNr is “3”.
A key code KC for the D# ₁ key is created based on the following. In other words, the content "000000" of the 6-bit index register IXr is transferred to the upper bits _B8 to _B3.
and note number register NNr with 3-bit configuration.
The key code KC "000000011" related to the D# ₁ key is created by combining the contents "011" as the lower bits _B2 to _B0 and stored in the key code register KCr. After this, the program enters step 1 via terminal _M2 as shown in FIG. 10b.
052, 1053, etc., and it is determined whether the change in the state of the D# ₁ key is due to a new key depression operation or a new key release operation. That is, in step 1052, the contents of the keyboard new status register KBNSr are shifted to the right by one bit, and if a borrow occurs as a result of this right shift, the change in the state of the _D1 key is assumed to be caused by a new key press operation, and the step is started. 105
It is determined by the branch instruction ``Borrow?'' in step 3, and if no borrow occurs, the state change of the D# <sub>1</sub> key is assumed to be caused by a new key release operation, and step 1 is executed.
This is determined by the branch instruction 053 "Borrow?". In other words, in this example, the contents of the keyboard new status register KBNSr are changed to "00000001" by the right shift command in step 1049.
It is becoming. Therefore, when the right shift instruction in step 1052 is executed, a borrow occurs and D
# A change in the state of <sub>the 1st</sub> key is determined to be due to a new key press operation, that is, it is determined to be an on event. Then, the program execution moves to the key-on routine of step 1054, where the key code KC of the D# <sub>1</sub> key is registered in any of the key-on files KOF <sub>1</sub> to KOF <sub>14</sub> , and then
It is sent as a series of on-event messages along with the initial touch data for the D# <sub>1</sub> key. The key-on routine of step 1054 will be described later using the detailed flowchart shown in FIG. When the sending of the on-event message regarding the D# <sub>1</sub> key is completed in this way, the program execution moves to step 1056, and the result of step 1043 is that there is an event in the octave specified by index number ix <sub>0</sub> . Determine whether there are any keys still involved. This judgment process is performed by the B accumulator.
This can be achieved depending on whether the contents of AccB are "0" or not. B accumulator in this example case
The content of AccB is that program execution is step 1.
"00000000" when moving from 043 to 1051
It is becoming. Therefore, this step 1056
When the branch instruction in step 1043 is executed, it is determined that there are no keys remaining that are related to the "event present" result in step 1043, and the program execution returns to the play event routine. In this case, the content of B accumulator AccB is “0”.
If not, it is determined that the key involved in the result of "Event exists" in step 1043 still remains, and the next step 1043 is performed.
57 increment instruction “(NNr)←(NNr)+
1), the note number register NNr is incremented, and the program then returns to step 1047 via the terminal <sub>M3</sub> . As a result, the remaining keys that are involved in the result of "event" in step 1043 are detected in the same way as above, and after the key code KC for this detected key is created, the on event related to this detected key is detected. A message or an off-event message is sent. Here, if no borrow occurs from the keyboard new status register KBNSr as a result of executing the right shift instruction in step 1052 (FIG. 10b), the program proceeds to step 1055 by the branch instruction "Borrow?" in step 1053. Shifting to execution of a key-off routine, processing is performed to cancel the registration of the key code KC registered in any of the key-on files KOF <sub>1</sub> to KOF <sub>14</sub> and to send an off-event message regarding the key code KC. In this case, the relevant key code KC
If the key code KC is not registered in any of the key-on files KOF <sub>1</sub> to KOF <sub>14</sub> , the key code KC is determined to be related to a key that is not assigned to a pronunciation channel, and is ignored. That is, in such a case, the off-event message is not sent. (Key-on Routine) Next, the key-on routine will be explained. FIG. 11 is a detailed flowchart showing one embodiment of the key-on routine. This key-on routine is a program that is executed when the change in key state in the octave specified by index number ix <sub>i</sub> is caused by a newly pressed key in the manual event search routine described above. A process for registering a key code KC corresponding to the pressed key and a process for sending an on-event message related thereto are performed. When the execution of the program shifts to the key-on routine, the initial value "14" is set in the key-on file search counter KFC by the load instruction "(KFC)←14" at step 1060. In other words, in order to detect a blank file among the 14 key-on files KOF <sub>1</sub> to KOF <sub>14</sub> for the upper keyboard UK and lower keyboard LK (corresponding to the 14 sounding channels for the upper keyboard UK and lower keyboard LK), the key-on file search is performed. counter kfc
is set to ``14''. After this, the execution of the program moves to step 1061, where the first arithmetic unit 101 uses the program counter PGC.
The contents of the key-on-file search counter KFC are sent to the address bus ADB ₁ as upper address information and the contents of the key-on-file search counter KFC as lower address information. Then,
Among the key-on-files KOF ₁ to KOF ₁₄ provided in the WRK memory 190, the memory contents of the key-on-file KOF ₁₄ specified by the content "14" of the key-on-file search counter KFC are stored in the data bus.
It is read into the first arithmetic unit 101 via DB ₁ . And this loaded key-on file
Determine whether the contents of KOF ₁₄ are blank. That is, the key-on file search counter
Check whether some key code KC is registered in the key-on file KOF ₁₄ specified by KFC content "14", or whether the key code KC is not registered and the key-on file KOF ₁₄ or blank file is set. to decide. If the key-on file KOF ₁₄ is found to be a blank file by this judgment process, a new key code related to the pressed key is assigned to this blank file KOF ₁₄ .
Register KC. The key code KC related to this newly pressed key is stored in the key code register KCr by the load command "(KCr)←(IXr)+(NNr)" in step 1051 in the manual event search routine described above. Therefore, _the process of registering a key code for a blank file starts with the load instruction "(KOF)<FC>←( KCr). On the other hand, key-on file search counter KFC
Key-on file specified by content "14"
If KOF ₁₄ is not a blank file, program execution moves from the branch instruction at step 1061 to the branch instruction "(KFC) = 1?" at step 1065, where the content of the key-on file search counter KFC reaches "1". It is determined whether the As a result of this judgment process, the content of the key-on file search counter KFC is "14".
Since this has not reached "1", program execution moves to step 1066, a decrement instruction, where the contents of the key-on-file search counter KFC are decremented. and,
The content of the new key-on-file search counter KFC is “13”, and the corresponding key-on-file search counter
It is determined in step 1061 whether KOF ₁₃ has become a blank file. As a result of this judgment process, if the key-on file KOF ₁₃ is not a blank file, the program execution returns to step 1065 and the same process as above is performed. Then, such processing is repeated, and when it is determined in step 1073 that the content of the key-on-file search counter KFC is "1", the 14 key-on-files KOF ₁ to
All KOF _14s have some kind of key code KC already registered, and it is determined that there is no key-on file in which the key code KC for the newly pressed key can be registered. It is determined that the sound channel to which the sound generation should be assigned does not exist, and the program execution returns to the manual event search routine. That is, if a blank file does not exist, the key code KC associated with the newly pressed key is ignored, and as a result, no musical tone corresponding to this pressed key is generated. On the other hand, if any of the key-on files KOF ₁ to KOF ₁₄ is a blank file, the key code KC for the newly pressed key is entered in step 106.
2, key-on file search counter
It is registered in the key-on-file KOF specified by KFC, but in the next step 1063, the initial touch data ITD for each calculation parameter regarding the pressed key is stored in the WRK register WRKr ₁ ~
Loaded into WRKr ₆ in a time-sharing manner. As described above, this initial touch data ITD reading process is executed based on the key code KC and the contents of the parameter counter PC regarding the pressed key. After this, the program execution will proceed to the next step 1.
064, and here the key-on file
An on-event message regarding a new pressed key registered in any of KOF ₁ to KOF ₁₄ is sent. As mentioned above, this on-event message starts with a unique discrimination code JC representing an on-event, followed by a key code KC that indicates a newly pressed key, and then a code for each calculation parameter related to the newly pressed key. Initial touch data
2nd processor section 2 via FIFO 1 in the order of ITD.
Sent for 00. When the process of step 1064 is completed, the program execution returns to the manual event search routine. (Key-off Routine) Next, the key-off routine will be explained. FIG. 12 is a detailed flowchart showing one embodiment of the key-off routine. This key-off routine is a program that is executed when the change in key state in the octave specified by index number ix _i is caused by a new key release operation in the manual event search routine described above. A process for deregistering a key code KC corresponding to a release key registered in any of the key-on files KOF ₁ to KOF ₁₄ and a process for sending an off-event message regarding the release key are performed. When the execution of the program shifts to the key-off routine, the initial value "14" is set in the key-on file search counter KFC by the load command "(KFC)←14" at step 1070. In other words, in order to detect the key-on-file KOF in which the key code KC corresponding to the release key is registered from the 14 key-on files KOF ₁ to KOF ₁₄ related to the upper keyboard UK and lower keyboard LK, the key-on file search counter KFC is first entered with "14" is set. After this, the program execution moves to step 1071, where the first arithmetic unit 101 sends the contents of the program counter PGC as upper address information and the contents of the key-on-file search counter KFC as lower address information to the address bus ADB ₁ . . Then, WRK memory 1
Key-on file KOF ₁ installed in 90
Of KOF ₁₄ , key-on file search counter
The stored contents of the key-on file KOF ₁₄ designated by the KFC contents "14" are read into the first arithmetic unit 101 via the data bus DB ₁ . Next, the content of the read key-on-file KOF ₁₄ and the key code KC corresponding to the release key stored in the key code register KCr are combined using the exclusive OR instruction “(KCr)V(KOF)<KFC>”. compared. As a result of this comparison process, if the contents of the key-on-file KOF ₁₄ specified by the contents of the key-on-file search counter KFC and the contents of the key code register KCr are not the same, the branch instruction "Are they the same?" in step 1072 is executed. The program execution then moves to step 1073, a branch instruction "(KFC)=1?", where it is determined whether the content of the key-on-file search counter KFC has reached "1". As a result of this judgment process, the content of the key-on-file search counter KFC is "14" and has not reached "1", so the program execution continues at step 10.
74 decrement instruction “(KFC)←(KFC)−
1", where the contents of the key-on-file search counter KFC are decremented. As a result, the content of the key-on-file search counter KFC becomes "13", and the program execution returns to step 1071, where the corresponding key-on-file search counter KFC becomes "13".
Read the memory contents of KOF ₁₃ , and then read the contents of the key-on file KOF ₁₃ and the key code register.
Compare the contents with KCr. As a result of this comparison process,
If the contents of the key-on-file KOF ₁₃ are not the same as the contents stored in the key code register KCr, the program execution again shifts from step 1072 to step 1073, the branch instruction "(KFC)=1?". Thereafter, such processing is repeated, and when it is determined in step 1073 that the content of the key-on-file search counter KFC is "1", the 14 key-on-file search counters KOF ₁
It is determined that the key code KC corresponding to the release key is not registered in any of ~KOF ₁₄ , and the program execution returns to the manual event search routine. That is, the off-event at this time is determined to be caused by a key release operation of a key that is not registered in any of the key-on files KOF ₁ to KOF ₁₄ , and the program execution returns to the manual event search routine. On the other hand, key-on file search counter KFC
If the contents of the key-on file KOF specified in and the contents stored in the key code register KCr are the same, the key-on file KOF is determined to be the key-on file in which the key code KC corresponding to this new release key was registered. , the execution of the program moves to step 1075 in response to the branch instruction "Is it the same?" at step 1072. Then, in step 1075, an off-event message regarding this release key is sent.
That is, the first processor section 100 sends out a determination code JC representing an off event and a key code KC corresponding to a release key as a series of off event messages. After this, the program execution continues at step 1076.
The key-on file KOF in which the key code KC corresponding to the release key is stored is transferred to KOF.
Clear. When the process of step 1076 is completed, the program execution returns to the manual event search routine. As is clear from the above explanation, the key-on routine shown in FIG. 11 and the key-on routine shown in FIG. It can be thought of as a channel processor that performs (Pedal Event Search Routine) Next, the pedal event search routine will be explained. FIGS. 13a-13c are detailed flowcharts illustrating one embodiment of the pedal event search routine. As described above, this pedal event search routine is executed when performing key state detection processing and preliminary registration processing on the pedal keyboard PK.
In other words, when the execution of the manual event search routine for the upper keyboard UK and lower keyboard LK described above is completed, the program execution starts from this FIG.
The process moves to the pedal event search routine shown in ~c (see FIG. 9). By the way, this pedal event search routine, like the aforementioned manual event search routine, can be roughly divided into two parts: detecting a change in key status and detecting the key that caused the change; It consists of a part for pre-registering keys or canceling pre-registration, and the former part is made up of a program similar to the manual event search routine. In other words,
Steps 1080 to 109 shown in FIGS. 13a and 13b
3 and step 1 shown in Figures 10a and b above.
Programs 040 to 1053 have the same content. Therefore, the program execution starts from the manual event search routine to FIG.
When the routine moves to the pedal event search routine shown in c, it is detected in steps 1080 to 1083 whether there is a change in the key state on the pedal keyboard PK, and in steps 1084 to 1091, the key involved in the change in key state is detected and the key code is detected. KC is created, and then step 10
At 92 and 1093, it is detected whether the key involved in the change in key state has been newly pressed or released. If the change in key state is an on-event, the program execution proceeds to step 1094 (FIG. 13b), which constitutes the preliminary registration portion of this pedal event search routine. Conversely, if the change in key state is an off event, program execution proceeds to step 1110 (FIG. 13c), which constitutes the preliminary deregistration portion of this pedal event search routine. First, a program for when a change in key state is detected as an on event will be described. If a change in the key state is detected as an on event by executing the branch instruction ``Borrow?'' in step 1093, the program moves to the execution of the branch instruction ``(PFGr) = 0?'' in step 1094. Priority flag register PFGr that executes priority control for preliminary registration of pedal keyboard PK
It is detected whether the contents of (Table 7) are "0" or "1". In other words, the electronic musical instrument shown in this example has a pedal keyboard as described above.
For PK, two pronunciation channels are always assigned, but only the most recently pressed last key is prioritized and channel assigned to these two pronunciation channels, and if this priority key is released. Priority control is performed so that the next most recently arrived key is prioritized and assigned to the two sound generation channels. If a plurality of new pressed keys are detected at the same time, priority is given to low tones, so that only the lowest pressed key is selected and processed as the last key to arrive. Therefore, the pedal keyboard PK
Pedal key-on file PKF for registering the key code KC corresponding to the key pressed in
is provided with two pedal key-on files PKFa and PKFb for the priority key and the next priority key (see Table 7),
These two pedal key-on file PKFa,
A musical tone based only on one of the key codes KC registered in PKFb is produced from two pronunciation channels. Therefore, musical tones related to this pedal keyboard PK are always related to a single pressed key and are single notes. The priority flag register PFGr is provided to perform such priority control, and when its content is "0", the key code registered in the pedal key-on file PKFa is set.
Indicates the state in which the musical tone corresponding to KC has already been sounded or should be sounded, that is, indicates the A-side priority state, and when it is "1", the musical tone corresponding to the key code KC registered in the pedal key on file PKFb. represents a state in which the sound has already been produced or a state in which the sound should be produced, that is, a state in which side B has priority. In other words,
If a new on event occurs while the priority flag PFG is "0", the key code KC registered in the pedal key on file PKFa will be associated with the next last arriving key, and the corresponding musical tone will disappear. At the same time, the key code KC related to the new on-vent will be added to the pedal key-on file as it relates to the last key at the time of notification.
It is registered in PKFb and the corresponding musical tone is played.
On the other hand, if a new on event occurs while the priority flag PFG is "1", the key code KC registered in the pedal key on file PKFb will be related to the next last arriving key, and the corresponding musical tone will be At the same time, the key code KC related to the new on event is registered in the pedal key on file PKFa as the key code related to the last key at the time, and the corresponding musical tone is produced. Therefore, the program execution starts at step 109.
4, the branch instruction "(PFGr)=0?" of step 1094 is executed. As a result, if the priority flag PFG is "0", the priority state at that point in time is the A side priority state, that is, the state where the musical tone based on the key code KC registered in the pedal key-on file PKFa is being sounded or is not being sounded. It is determined that the situation was as it should have been. After this, program execution moves to the next step 1095, where the pedal key on file is
Is the key code KC registered in PKFa?
Or determine whether it is a blank file. As a result of this judgment process, if it is found that the key code KC has already been registered in the pedal key on file PKFa, the program execution moves to the next step 1098, where the key code registered in the pedal key on file PKFa is registered.
An off-event message is sent indicating that the musical tone corresponding to KC should disappear. On the other hand, as a result of the judgment processing in step 1095, if it is found that the pedal key on file PKFa is a blank file, the program execution proceeds to step 10.
Move to 97. Pedal key on file PKFa even though the priority status is A side priority status
The fact that is a blank file means that no musical tone related to the pedal keyboard PK is being produced at that point in time. Therefore,
In this case, the program execution immediately moves to step 1097, where the key code KC related to the on event at that point in time is registered in the pedal key on file PKFb. After this, the program moves to step 1098, and the new key code KC registered in the pedal key on file PKFb is entered.
Sends an on-event message with a unique identification code JC. As a result, the key code KC registered in the pedal key-on file PKFb corresponds to the last key arrived at the present time, and the corresponding musical tone is generated. When the process of step 1093 is completed, the program execution moves to the next step 1099, where the priority flag PFG is set to "1".
In other words, the current priority state is updated to the B-side priority state, and then the process returns to the play event search routine described above. The above is the processing content when a new on-event occurs in the A-side priority state, but similar processing is executed when a new on-event occurs in the B-side priority state. In other words, step 10
If the priority flag PFG is “1” as a result of executing the judgment instruction “(PFGr)=0?” in No.94, the priority state at that time is the B-side priority state,
In other words, it is determined that the musical tone based on the key code KC registered in the pedal key on file PKFb is being sounded or should be sounded, and in the next step 1100, it is determined whether the contents of the pedal key on file PKFb are blank or not. Decide whether or not. As a result of executing the judgment command "(PKFr)=empty 7" in step 1100, if it is found that the key code KC is registered in the pedal key on file PKFb, the key code KC is registered in the pedal key on file PKFb in the next step 1101. An off event message is sent indicating that the musical tone based on the key code KC should disappear. Conversely, if it is found that the contents of the pedal key on file PKFb are blank, the program execution immediately moves from step 1100 to step 1102, where the key code KC related to the on event at that point in time is stored in the pedal key on file PKFa. register. After this, in the next step 1103, the pedal key on file is
The on-event message regarding the new key code KC registered in PKFa is sent to the unique identification code JC.
Send with . As a result, the key code KC registered in the pedal key on file PKFa corresponds to the last key received at this time.
A musical tone corresponding to this is produced. When the process of step 1103 is completed, the program execution moves to the next step 1104, where the priority flag PFG is updated to "0",
That is, the current priority state is updated to the A side priority state, and thereafter the process returns to step 1030 of the play event search routine (FIG. 9) described above. Next, a program will be described in which a change in the key state on the pedal keyboard PK is detected as an off event by the judgment command "Borrow?" in step 1093. If a change in key state is detected as an off event, program execution moves from step 1093 to step 1110 of FIG. 13c. Then, in step 1110, it is compared whether the key code KC related to the off event is the same as the key code KC registered in the pedal key on file PKFa. This comparison process is realized by executing an exclusive OR process between the memory contents of the key code register KCr and the memory contents of the pedal key-on file PKFa. If the value obtained as a result of executing this exclusive OR processing is "0", it means that the memory contents of the key code register KCr and the memory contents of the pedal key-on file PKFa are the same, and the process in step 1111 is performed. The branch causes program execution to proceed to step 1112. Conversely, if the value obtained by the exclusive OR processing in step 1110 is a positive value, it means that the stored contents of the key code register KCr and the stored contents of the pedal key-on file PKFa are different. By branching at step 1111, the program execution moves to step 1119, and in this step 1119, the key code register KCr is set.
Compare the memory contents of the pedal key-on file PKF 6 with the memory contents of the pedal key-on file PKF ₆ . Such a comparison process means that it is detected whether the key code KC related to the off event is registered in the pedal key on file PKFa or PKFb.
Therefore, if the key code KC related to the off event is registered in the pedal key on file PKFa, the program is executed in step 1.
By branching at step 111, the process moves to step 1112.
Here, it is determined in which priority state the key registered in the pedal key on file PKFa was released. In other words, it is determined in which priority state the off event occurred at this time, and from this it is determined whether the key registered in the pedal key on file PKFa corresponds to the last arrived key. to judge. For example, when the priority flag PFG shows "0" at this time, indicating the A side priority state, the key registered in the pedal key on file PKFa is the last key arrived at this time, and the off event at this time It can be seen that this is an off event due to the release of the last arrived key. In this way, when it is known that the key code KC registered in the pedal key on file PKFa is related to the last key received, the program execution proceeds to step 1.
114, where an off event message regarding the contents of the pedal key on file PKFa (key code KC) is sent, and then in the next step 1115, the pedal key on file is sent.
Clear the contents of PKFa. As a result, the musical tone corresponding to the last key that was registered and sounded in the pedal key on file PKFa is erased. When this processing is completed, the execution of the program moves to step 1116, where it is determined whether the contents of the pedal key-on file PKFb are blank based on the determination command "(PKFa)=empty?". That is, in the A-side priority state, it is determined whether the key code KC corresponding to the next last arriving key is registered in the pedal key-on file PKFb. As a result of this judgment process, if the contents of the pedal key-on file PKFb are blank, the program returns to step 1030 of the play event search routine (FIG. 9) via the terminal _PD4 . However, if some key code KC is registered in the pedal key on file PKFb, the program execution will proceed from step 1116 to step 1117.
It is assumed that the key code KC registered in the pedal key-on file PKFb corresponds to the next succeeding key, and an on-event message regarding the next succeeding key is sent here. As a result, a musical tone corresponding to the next succeeding key registered in the pedal key-on file PKFb is produced. When this process is completed, the program execution moves to step 1118, updates the priority flag PFG to "1", sets the priority state to the B-side priority state, and then returns to the play event search routine. On the other hand, the judgment instruction in step 1112 is “(PFGr)
=0? Pedal key on file by PKFa
If it is found that the key registered in
Execute command 13 “(PKFa):Clear” to clear the contents of the pedal key-on file PKFa,
After this, the process returns to the play event search routine. The above is the processing content when an off event occurs regarding the same key code as the key code KC registered in the pedal key on file PKFa. Similar processing is performed when an event occurs. In other words, in step 1119, as a result of executing the exclusive OR processing of the memory contents of the key code register KCr and the pedal key-on file PKFb, if the obtained value is "0", the memory contents of the key code register KCr and the pedal key-on file PKFb are executed. file
The stored contents of PKFb are the same, and the execution of the program shifts to step 1121 by branching from step 1120. However, if the value obtained as a result of executing the exclusive OR process is a positive value, the memory contents of the key code register KCr are different from the memory contents of the pedal key-on files PKFb and PKFa, and at this time It is determined that the off event is due to the release of a key that is not registered in either of the two pedal key on files PKFa and PKFb, and the program execution immediately returns to the play event search routine. When the program execution moves from step 1120 to step 1121, this step 112 is executed as in the case of the pedal key on file PKFa.
Pedal key on file is determined by determining the contents of the priority flag PFG in step 1.
It is determined whether the key assigned to PKFb corresponds to the last arriving key or the next succeeding arriving key. In other words, the priority flag PFG is “0”
If so, the key registered in the pedal key on file PKFb is determined to correspond to the next succeeding key, and the program execution proceeds to step 1121.
The process moves to step 1122, where the contents of the pedal key on file PKFb are cleared, and then the process returns to the play event search routine. Conversely, if the priority flag PFG is "1", the key registered in the pedal key on file PKFb is determined to be the last key received, and the program execution branches from step 1121 to step 1123. do. and,
After sending an off event message regarding the contents of the pedal key on file PKFb in step 1123, the contents of the pedal key on file PKFb are cleared in the next step 1124. This allows the pedal key-on file to be
The musical tones registered and sounded in PKFb will be deleted. When this process is completed, the program execution moves to step 1125, where it is determined whether the key code KC corresponding to the next succeeding key is registered in the pedal key on file PKFa. If the pedal key on file
If the key code KC corresponding to the next most recently arrived key is not registered in PKFa, the program execution returns to the play event search routine. but,
When it is found that the key code KC corresponding to the next succeeding key is registered in the pedal key on file PKFa, the program execution proceeds to the next step 112.
6, where an on-event message regarding the contents of the pedal key-on file PKFa is output. As a result, a musical tone corresponding to the next succeeding key registered in the pedal key on file PKFa is produced. When this processing is completed, the program execution moves to step 1127, updates the priority flag PFG to "0", sets the priority state to the A side priority state, and then returns to the play event search routine. As is clear from the above explanation, in the pedal keyboard PK, the musical tone corresponding to only the most recently pressed last key among the plurality of pressed keys is sounded preferentially, and the last pressed key is not released. In this case, a musical tone corresponding to the next succeeding key is produced. This makes it extremely convenient for legato performances in which musical tones change continuously without any breaks. (Modulation Data Get Routine) Next, the modulation data get routine will be explained. FIG. 14 is a detailed flowchart showing one embodiment of the modulation data get routine. This modulation data get routine is a program that is executed after _the execution of the play event search routine described above is completed, and is a program that is executed after the execution of the play event search routine described above is _completed . Processing is executed to extract modulation data regarding the pressed keys (excluding pedal keyboard PK) from the modulation circuit 150. When the execution of the program shifts from the play event search routine to the modulation data get routine, first, the initial value "14" is set in the key-on-file search counter KFC by the load command "(KFC)←14" in step 1130. is set. In other words, in order to detect the key-on-file KOF in which the key code KC is registered among the 14 key-on files KOF ₁ to KOF ₁₄ related to the upper keyboard UK and lower keyboard LK, the key-on-file search counter KFC is set to "14." Ru. After this, the program execution proceeds to the next step 1131.
Here, the first arithmetic unit 101 uses the contents of the program counter PGC as upper address information and the contents of the key-on-file search counter KFC as lower address information to the address bus ADB ₁ .
As a result, the contents of the key-on-file KOF specified by the contents of the key-on-file search counter KFC are read out and loaded into the A accumulator AccA. Then, in the next step 1132, by determining whether the contents of the A accumulator AccA are "0", it is determined whether the key code KC is registered in the key-on-file KOF specified by the contents of the key-on-file search counter KFC. judge whether As a result of this judgment process, if the content of the A accumulator AccA is “0”, the key-on file is
It is determined that the key code KC is not registered in KOF, that is, the key code KC is not registered in the KOF.
KOF is determined to be a blank file and the terminal
The process moves to step 1142 via MG ₃ . If the content of the key-on-file search counter KFC reaches "1" in step 1142, the process returns to the main routine (FIG. 8a). i.e. all key-on file KOF ₁
It is assumed that the extraction process of the modulation data related to the key code KC registered in ~KOF ₁₄ is completed, and the process returns to the main routine. but,
If the content of the key-on file search counter KFC has not reached "1" in step 1142, the program execution moves to step 1143, and the decrement command "(KFC)←(KFC)-1" in step 1143 is executed. Step 1131 via terminal MG ₂ after executing and decrementing the contents of the key-on file search counter KFC.
Return to new key-on file search counter
Any one key-on file with KFC contents
Specify KOF, read its contents, and load it into A accumulator AccA. Then, as a result of executing the judgment instruction "(AccA)=0?" in step 1132, the content of the A accumulator AccA is "0".
If not, it is determined that the key code KC is registered in the key-on file KOF, and the process moves to the next step 1133. and,
In this step 1133, the first arithmetic unit 1
01 is the latch 150 of the modulation circuit 150 (FIG. 6)
Sends the I/O device address of 1 to address bus ADB ₁ as upper address information and the key code KC registered in the relevant key-on-file KOF as lower-order address information, thereby registering it in the relevant key-on-file KOF. key code
Aftertouch signal related to KC (analog signal)
Extract. As described above, this extracted aftertouch signal is combined with the output signal of the effect modulation oscillator 130 using a variable resistor or the like in the aftertouch weighting circuit 150c or 150d of the corresponding keyboard in a different weighted manner. The signal is decomposed into modulation signals for each type of calculation parameter, and is supplied to the analog multiplexer 150h of the modulation circuit 150. During this time, the program execution moves to step 1134, and the determination code JC regarding the modulation data and the key code KC registered in the key-on file KOF are sent to the second processor section 200. When this process is completed, step 1
135, and here, in order to read the modulation data related to the key code KC registered in the relevant key-on-file KOF for each calculation parameter, a load command "9" as an initial value is sent to the parameter counter PC "( PC)←9” (see Table 6). Next, the process moves to step 1136, where the first arithmetic unit 101 connects the I/O of the latch 1501 as shown in Table 5 above.
The O device address is sent to the address bus ADB ₁ as upper address information, the keyboard code KBC of the key code KC as next address information, and the contents of the parameter counter PC as lower address information. Then, among the modulation signals related to the key code KC, the analog multiplexer 150h extracts the modulation signal corresponding to the contents of the parameter counter PC and outputs the modulation signal to the AD.
Supplied to C160. This starts the AD conversion process in the next step 1137. After this, the program execution continues at step 113.
8 and enters a standby state until the conversion end signal EOC appears on the data bus. Then, when the conversion end signal EOC appears, the next step 113
9, the modulation signal digitized by the AD.C 160 is read and sent to the FIFO 1 as modulation data. When the reading process of the modulation data regarding one calculation parameter specified by the contents of the parameter counter PC is completed in this way, the program execution proceeds to the next step 114.
0, and here the parameter counter
Determine whether the contents of the PC have reached "14". That is, it is determined whether reading processing of modulation data regarding all calculation parameters of the key has been completed (see Table 6). As a result of this judgment process, if the content of the parameter counter PC has not reached "14", the content of the parameter counter PC is incremented by the increment command "(PC)←(PC)+1" in the next step 1141, New parameter counter PC
Modulation data corresponding to the content of is read in the same manner as in the previous case. Repeating this process will cause the parameter counter to
When the contents of the PC become "14", the program execution branches to step 1140.
Move to 2. Then, the key-on-file search counter is activated by the judgment command in step 1142.
If the content of KFC has reached "1", it is assumed that the reading process of the modulation data related to the pressed keys registered in the key-on files KOF ₁ to KOF ₁₄ has been completed, and the program execution is started as the main one. Return to routine. The relationship between the contents of the parameter counter PC and each calculation parameter (CA, LA, CT, Pi, M ₁ , M ₂ ) is shown in Table 6. The above is a detailed explanatory diagram of the program that performs various processes in the first processor section 100. Next, the detailed configuration and operation of each part in the second processor section 200 will be explained. Second Arithmetic Device 201 The second arithmetic device 201 is composed of a general-purpose microprocessor, and has built-in accumulators, registers, counters, etc. as shown in Table 17 below. It should be noted that this Table 17 only lists what is necessary to explain the contents of the calculation process later.

[Table] As is well known, the program counter PGC reads the contents from an I/O device, memory, etc. to which a specific address has been assigned in advance, or reads the contents from the second arithmetic unit 201 to an I/O device, memory, etc. It outputs address information when transferring various information. The A accumulator Acc stores the calculation results of a predetermined calculation program, and calculation processing other than data transfer processing is performed in this A accumulator.
Executed in combination with Acc. Channel counter CC is musical tone parameter G
[CA] ~ G [M ₂ ] and frequency parameter R
This is a counter that specifies the channel for which (R ₁ , R ₂ ) should be calculated, and the channel when assigning or canceling the channel assignment of the key code KC, and the corresponding pronunciation channel is specified by the contents "0 to 15". is specified. The parameter counter PC and sub-parameter counter SPC receive calculation parameters IZm,
This is a counter that specifies the type of musical tone parameter and the type of calculation parameter when reading BL, ADRm, etc., or calculating musical tone parameters for each type. Note that the correspondence between the types of musical tone parameters and the contents of the parameter counter PC and the correspondence between the types of calculation parameters and the contents of the sub-parameter counter SPC will be described later. The first series channel number register CNr ₁ is a register that temporarily stores the channel number to which the key code KC related to the first series is assigned in the truncate control described later, and the second series channel number register CNr ₂ is a register that stores the key code KC related to the second series. This register temporarily stores the channel number to which the code KC has been assigned. The priority set register PRSr is a register used to detect the lowest truncate order value of each sound channel in truncate control to be described later. The sequence number set register DNr is a register that temporarily stores the sound sequence number data for the upper keyboard UK and lower keyboard LK, which is transferred as part of the registration data from the first processor section 100, and is a register that temporarily stores the sound sequence number data of the upper keyboard UK and lower keyboard LK, which is transferred as part of the registration data from the first processor section 100. In the case of , the content is ``0'', and if the number of sequences is 2, the content is ``10''. Tone control information table (TCT) 210 The TCT 210 is composed of a well-known memory element such as a ROM, and as shown in Table 18 below, it has a memory block MB corresponding to eight types of tone numbers for each keyboard. ₁ to MB ₂₄ , and each memory block MB ₁ to _{MB 24} is used for musical tone parameters G [CA] to G [[M ₂ ] and release data [Re] for controlling the release section of the generated musical tone.
It _is equipped with sub-memory blocks SMB ₀ to SMB ₆ that correspond to
SMB ₆ includes minor memory groups MMG ₀ to MMG ₇ as shown in Table 19 below. And out of submemory blocks SMB ₀ to SMB ₆ , SMB ₁ to
The minor memory groups MMG ₀ to MMG ₇ of SMB ₆ contain direct calculation parameters IZm and Tm for calculating musical tone parameters G[CA] to G[ _M2 ] corresponding to each keyboard tone number and address pointers. Indirect calculation parameter Δ・
ADRm, n.ADRm, and BL.ADRm are stored as shown in Table 19.

【table】

[Table] In this case, musical tone parameters G [CA] ~ G
[M ₂ ] Direct calculation parameter Tm and indirect calculation parameter n・ADRm,Δ・
For ADRm, the direct calculation parameter T・Im for the attack part and the indirect calculation parameter n・ADR・Im, Δ・ADR・Im
Two types of direct calculation parameters T·m and indirect calculation parameters n·ADR·m and Δ·ADR·m for the decay part are stored. In addition, regarding the release data D [Re] for controlling the release part of the generated musical tone, the direct calculation parameter Tm regarding the calculation cycle,
Only the indirect calculation parameter Δ·ADRm for reading the increase/decrease value Δm for each calculation cycle is stored, and the other minor memory groups are blank. This is because for the release part, it is only necessary to control the release level and release time, and there is no need to perform pitch-related control. This TCT210 stores memory blocks MB ₁ to _{MB 8} with address information corresponding to each keyboard tone number.
One of MB ₉ to MB ₁₆ , MB ₁₇
One of the submemory blocks SMB 0 to SMB ₂₄ is specified, and one of the submemory blocks SMB ₀ to SMB ₆ is specified using address information corresponding to the contents of the parameter counter PC provided in the second arithmetic unit 201. (See Table 19) Furthermore, the second arithmetic unit 20
One of the minor memory groups MMG ₀ to MMG ₇ is specified by the address information corresponding to the contents of the subparameter counter SPC provided in the subparameter counter SPC provided in the subparameter counter SPC.
(see table 19), each calculation parameter IZm,
Tm, Δ·ADRm, n·ADRm, and BL·ADRm are read. Note Scaling Table (NST) 220 The NST 220 is composed of a well-known memory element such as a ROM, and contains calculation parameters for note scaling for the initial values of each tone parameter corresponding to the characteristic curves shown in FIG. 15, for example. BL is stored and the indirect calculation parameters read from the TCT210 mentioned above.
One of the characteristic curves is specified by BL/ADRm, and a key code KC corresponding to the pitch of the pressed key is specified.
By being addressed by , the calculation parameter BL as a coefficient value for note scaling is read out. For example, indirect calculation parameter BL・
The contents of ADRm and note scaling are related as shown in Table 20 below, and the parameters
Free note scaling can be performed by selecting the contents of BL/ADRm.

[Table] Δ table 230, n table 240 Δ table 230 and n table 240 are
It is composed of well-known memory elements such as ROM. As mentioned above, the Δ table 230 stores the calculation parameter Δm corresponding to the increase/decrease value for each calculation cycle of the musical tone parameters G[CA] to G[M ₂ ], D[Re], and is read out from the TCT 210. The memory content Δm is read out by the indirect calculation parameter Δ·ADRm. As mentioned above, the n table 240 stores calculation parameters _n corresponding to the number of calculations of musical tone parameters G[CA] to G[M ₂ ], and TCT21
It is addressed by the indirect calculation parameter n·ADRm read from 0, and its memory content n _n is thereby read out. Logarithm table 250, R table (RNT) 26
0 Logarithm table 250 and R table 260
is composed of a well-known memory element such as ROM. In the logarithm table 250, as shown in Table 21 below, a logarithm value logαx with a special value α=21/252=1.002754370 as the base is stored in each address, and a certain natural number value x is used as address information x. When input, the value logαx obtained by logarithmizing x is read out.

[Table] By the way, the denominator of the exponent part of base α = 21/252 is ``252
” is the interval between notes C and B in one octave.
Corresponds to the value "12 x 21 = 252" when divided into 21,
As a result, the base α=21/252 becomes a value corresponding to the pitch difference of 4.762 cents between adjacent tones when one octave is divided into 252. RNT260 is log
A value represented by R=αy, where αR=y, is stored at each address, and when a certain value y expressed in logarithm is input as address information, a value R expressed as a natural number is read out.

[Table] Timer 270 Tone parameters G related to all sound channels
A timer 270 for regulating the calculation processing time of [CA] to G[M ₂ ] is configured as shown in FIG. 16, for example. In FIG. 16, a counter 270a is connected to a data bus via a 3-state bus buffer 270b.
Cleared by reset signal RST supplied from _DB2 . Thereafter, counter 270a counts the clock signal supplied from oscillator 270d via AND gate 270c. When the count value of the counter 270a reaches the maximum value (all bits are "1"), the AND condition of the AND gate 270e is satisfied, and the timer flag signal TFG is output from its output. This timer flag signal
TFG is output. This timer flag signal TFG
is inverted by inverter 270f and becomes an inhibit input to AND gate 270c, thereby stopping the supply of the clock signal to counter 270a and stopping the counting operation of counter 270a. On the other hand, the timer flag signal TFG is transmitted to the second arithmetic unit 2 via the 3-state bus buffer 270g.
01. Then, the calculation processing time is controlled based on the read timer flag signal TFG. Working memory (WRK memory) 280 The working memory 280 is composed of well-known memory elements such as RAM, but some of the memory areas are used to secure registers as shown in Table 23 below. has been done.

【table】

[Table] Channel assignment tables CAT ₁ to _{CAT 16} contain the key code KC of the pressed key to be sounded in each sound channel and a series flag indicating whether the key code KC relates to the first or second series. is assigned to the next
When a key code KC that is registered and assigned to a channel as shown in Table 24 (Part 1) is released, the truncate ranking value TRi corresponding to the key release order is changed to the one shown in Table 24 below through channel assignment release processing. This is a table registered as shown in (Part 2).

[Table] By the way, in Table 24 (Part 1), "*"
The mark indicates the bit position of the series flag, bit B ₁₁
is “1”, the key code KC (=KBC) stored in the corresponding channel assignment table CAT
+OC+NC) indicates that the key code is related to the second series, and when bit _B11 is "0", it indicates that the key code KC is related to the first series. Furthermore, when the key code KC is assigned to the most significant bit _B15 , a bit flag BSY FG of "1" is set at the same time.
B ₁₅ indicates that the channel is busy. On the other hand, if the key is released, Table 24 (Part 2)
As shown in , the truncate rank value TRi is
As shown in Table ₂₅ below, the truncate rank value TRi is set to " ₀₀₀₀ " for the oldest released key, and "0000" for the next oldest released key. It is set as "0001". Then, when assigning the key code KC corresponding to the newly pressed key to a channel, the key code KC related to the first series is registered in the channel assignment table CAT whose truncate rank value indicates "0000", and the truncate rank value is Key code related to the second series for channel assignment table CAT showing "0001"
KC is registered.

[Table] As can be seen from the above, the contents of channel assignment tables CAT ₁ to CAT ₁₆ are such that if the pressed key is assigned to a channel, the most significant bit B ₁₅ becomes "1", and the overall result is negative. If it is a blank channel, it indicates a positive value from 0 to 15 (in decimal notation). Therefore, when detecting a blank channel, use this channel assignment table CAT ₁ ~
This can be achieved by simply detecting whether the most significant bit _B15 of CAT ₁₆ is "1" or "0". Next, key code tables KCT ₁ to _{KCT 16} are
This is a table that stores key codes KC assigned to channels for each channel. The key code KC assigned to the channel is also stored in _the channel assignment tables CAT ₁ to _{CAT 16} mentioned above;
The contents of are cleared when the key assigned to each channel is released. Therefore, it becomes impossible to perform arithmetic processing on musical tone parameters regarding the release portion of the musical tone corresponding to the release key. The key code tables KCT ₁ to KCT ₁₆ are provided for this purpose. registration register
RGNr ₁ to RGNr ₂₂ are registers that store registration data transferred from the first processor section 100. The footswitch flag register FFGr is a register that stores the footswitch flag FFG transferred from the first processor section 100 and indicating the on/off state of the footswitch. Modulation data register MDDr ₁ ~
MDDr ₁₆ and initial data register IZDr ₁ ~
The IZDr ₁₆ is a register that stores the modulation data and initial data for each calculation parameter transferred from the first processor section 100, and each of these registers is "8".
It has a memory capacity of 6" bits, and each calculation parameter is assigned a key code KC to the channel.
It is stored in 8-bit units in association with Parameter calculation registers PRG ₁ to PRG ₁₆ contain a total of 96 registers used to calculate tone parameters for each sound channel for each type and channel.
It is a word (16 channels x 6 parameters) register, and the unit word (48 bits) corresponding to each parameter type is further divided into 6 pieces of 8 bits as shown in Table 26 below, and the calculation parameters related to the calculation cycle are The T area stores T, the JA area stores the jump address JA of the calculation routine to be executed next, such as the attack part calculation routine and the decay part calculation routine, and the tone number supplied to the TCT 210 as upper address information. TCT/ADR that stores the address information TCT/ADR
An ADR area, an n area for storing a computation parameter n related to the number of computations, a Δ area for storing a computation parameter Δ for an increase/decrease value, and a VALUE area for storing an accumulated value VALUE of the computation parameter Δ are secured. One of the parameter calculation registers _{PRG 1} to _{PRG 16} is specified by the channel counter CC provided in the second arithmetic unit 201, and each parameter is calculated according to the contents of the parameter counter PC. A unit word corresponding to the type is designated, and various data are transmitted and received using this unit word.

【table】

[Table] As shown in the following Table 27, the temporary parameter memories TPM ₁ to TPM ₁₆ calculate the VALUE value of each musical tone parameter obtained in each unit word of the parameter calculation registers PRG ₁ to _{PRG 16} described above. The result of adding the modulation data for each parameter is temporarily stored in 96 words (16 channels x
6 parameters), and one of TPM ₁ to TPM ₁₆ depending on the contents of channel counter CC.
is specified, a unit word corresponding to the type of tone parameter is specified according to the contents of the parameter counter PC, and the VALUE value + modulation data of the stored contents is read out.

[Table] The second series set flag register F2Sr is used to set the key code KC of the second series when assigning or canceling the channel assignment of the key code KC for a keyboard whose sound series number is set to "2". This is a register that is set to "1" when performing channel assignment or channel assignment cancellation. Indicates that it is related to a series. Parameter conversion instruction flag register CFGr
is a register that temporarily stores that the parameter currently being calculated should be converted to a new parameter later, and this parameter conversion instruction flag register
Parameter conversion instruction flag of “1” from CFGr
If CFG is output, musical tone parameter G
Among [CA] to G[M ₂ ], musical tone parameters G[CA], G[CT], and G related to the pitch of the generated musical tone
Based on [Pi], frequency parameters R (R ₁ , R ₂ ) are calculated in a parameter conversion routine to be described later. logCA register LCAr and logCT register
LCTr reads out these parameters G by addressing the aforementioned logarithm table 250 with musical tone parameters G[CA] and G[CT].
These registers temporarily store logarithmic values logαCA and logαCT corresponding to [CA] and G[CT], respectively. The y register yr is a register that temporarily stores the frequency parameter logαR calculated by logarithmic operation, and the content of this y register yr is y=logα
When R is given as address information to the RNT 260, a natural number frequency parameter R is read out from the RNT 260. J register Jr corrects the content y of y register yr given as address information to the RNT260 described above to ``0≦y≦251'' when ``y<0'' or ``y>251''. This is a register that temporarily stores the correction value J when given. The K register Kr temporarily stores an instruction flag K (calculation of _R 1 when K= _{0, calculation of R 2 when} K= ₁ ) which instructs which frequency parameter should be calculated next among frequency parameters 1 and R 2. It is a register. The CAT search counter RCC displays the channel assignment table of all musical tone channels when the musical tone of a certain tone channel reaches the release end.
This is a counter used to update the truncate ranking values set for CAT ₁ to CAT ₁₆ . The above is a detailed description of the configuration of each part constituting the second processor section 200. The operation of the second processor section 200 will be described in detail below in accordance with the calculation program stored in the program memory 202. 17 to 27 show the second processor section 20
2 is a flowchart showing an example of an arithmetic program in 0. First, the main routine shown in FIG. 17 will be explained. As mentioned above, this main routine can be roughly divided into the channel sign routine,
It consists of a modulation data get routine, a registration data get routine, a release control routine, and a parameter calculation routine. In the main routine shown in FIG. 17, when the power is turned on by the performer, first, in step 2000, the memory contents of all the circuits' memories, registers, etc. are cleared, so that the second processor section 200 returns to the initial state. becomes. After this, the second processor section 200 enters a standby state waiting for data transfer from the first processor section 100, but when a message with the discrimination code JC is transferred from the first processor section 100, it The type of forwarded message is determined in step 2001 based on the determination code JC. If the determination code JC is related to a key on event or off event, the process moves to a channel assignment routine in step 2002, where channel assignment processing or channel assignment cancellation processing is executed. After this, the process moves to step 2003, where calculation processing of various tone parameters G[CA] to G[ _M2 ] and frequency parameters R( _R1 , _R2 ) corresponding to the pressed keys of each channel is executed. Then, this result is transferred to the third processor section 300. Next, if the discrimination code JC is related to a foot switch on or off event,
Execution of the program moves from step 2001 to a release control routine in step 2006, in which a tone generation channel in which the key has already been released is detected, and processing is performed to shift the tone in this channel to a predetermined release level. Next, if the discrimination code JC is related to modulation data, the program execution moves from step 2001 to step 2007, where the modulation data transferred from the first processor section 100 is processed. Store the modulation data MDDr ₁ to MDDr ₁₄ in association with the key code KC assigned to the channel. Next, if the determination code JC is related to registration data, the program execution moves from step 2001 to step 2008, a registration data get routine, where the registration data transferred from the first processor section 100 is transferred. The registration data is stored in the registration data RGNr ₁ to RGNr ₂₂ in order. When the predetermined processing in each routine of steps 2006 to 2008 is completed, the execution of the program shifts to the parameter calculation routine of step 2003, where various musical tone parameters G
[CA] ~ G [M ₂ ] and frequency parameters R ₁ , R ₂
Perform the calculation. When the calculation process of various parameters related to the pressed keys assigned to each channel is completed in this way, the program execution proceeds to step 200.
4, where it is determined whether the timer flag signal TFG output from the timer 270 has become "1". As a result of this judgment process,
When the timer flag signal TFG is "0", it is determined that the calculation processing time for various parameters regarding all channels has not reached a certain period of time, and the program waits at step 2004 until the timer flag signal TFG becomes "1". I am made to do so.
Thereafter, when the timer flag signal TFG becomes "1", the program execution branches from step 2004 to step 2005, where the timer 270 is reset. After this, the program execution starts from step 2005 to step 200.
Return to step 1 and check the discrimination code JC again here. At this time, the first processor section 100
If no messages are forwarded from
By branching to "Nothing", the process moves to step 2003, a parameter calculation routine. As can be seen from the above explanation, this main routine consists of various subroutines such as a channel assignment routine, a release control routine, a modulation data get routine, a registration data get routine, and a parameter calculation routine, which are combined as a circular program. The processing time of all subroutines is regulated by the set time set in the timer 270. Therefore, in the second processor section 200, various parameters of all the sound channels are created at the time interval set by the timer 270, and as a result, the parameters of the third processor section 30 are created.
0, various musical tone parameters at new times are transmitted at the time intervals set by the timer 270. The reason why the total processing time of various musical tone parameters is regulated by the set time of the timer 270 is that it is possible to control the total processing time of each musical tone parameter by the time set in the timer 270. This is to prevent time from becoming random and envelope control, which requires controlling the amplitude value at regular time intervals, to become impossible. (Channel Assign Routine) Next, the first
This will be explained in detail based on the flowcharts shown in FIG. 8a and FIG. 18b. When the execution of the program in the main routine shifts to the channel assignment routine, it is first determined in step 2010 of FIG. 18a whether the message transferred from the first processor section 100 is related to a key on event or a key off event. It is judged whether This judgment process is determined based on whether the least significant bit information B ₀ (LSB) of the discrimination code JC is "1" or "0". (No. 10
(see table). In other words, if the lowest bit information _B0 of the discrimination code JC is "1", the first processor section 1
The message transferred from 00 is determined to be related to a key on event, and conversely, if the least significant bit information _B0 is "0", it is determined to be related to a key off event. This step 2
As a result of the judgment process in step 010, if the message transferred from the first processor section 100 is related to a key on event, the program execution moves to the next step 2011, and the program after this step 2011 is pressed. If the channel assignment for the key is performed and the transferred message is for a key off event, the program execution moves via terminal CA1 to step 2030 shown in FIG. The channel assignment to the pressed key is canceled by the program. Therefore, this channel assignment routine can be roughly divided into a channel assignment flow for channel assignment and a channel assignment release flow for canceling channel assignment. (Channel allocation flow) First, the notification step 201 shown in Figure 18a
The channel allocation flow from 1 onwards will be explained. First, in step 2010 described above, when it is determined from the first processor unit 100 that the transferred message is related to a key on event, the program execution moves to step 2011, where the on event message is transmitted to any key (UK). , LK, or PK is determined based on bit information _B1 of the second lowest bit of the discrimination code JC (see Table 10).As a result of this determination process, the on-event message related to pedal keyboard PK If it is found that there is, the program moves to step 2012,
At 012, the pedal keyboard PK is stored in the sequence number set register DNr provided in the second arithmetic unit 201.
Load "2", which is the number of pronunciation series. on the other hand,
If it is determined that the on-event message is related to the upper keyboard UK or lower keyboard LK, the program execution moves to step 2013, where the registration registers RGNr ₁ to RGNr ₂₂ in the WRK memory 280 are first read (Table 23). The number of pronunciation series data (see Table 11 Part 1) stored in one of the keys is read out, and then it is detected whether the set number of series for the relevant keyboard is "1 series" or "2 series". As a result of this detection process, if the set number of series for the corresponding keyboard is "1 series", the program execution moves to step 2014, where "1" is loaded into the series number set register DNr. Furthermore, if the set number of series for the corresponding keyboard is "2 series", the program execution moves to step 2015, where the number of series set register DNr is set.
Load "2" into. When the above processing is completed, the key code sent as part of the on-event message
Shift to KC channel allocation processing. Therefore, first in step 2016, a numerical value "16" corresponding to the 16th channel is loaded into the channel counter CC as an initial value. After this, the program execution moves to the next step 2017,
Here, the content of the channel assignment table CAT ₁₆ corresponding to the channel specified by the channel counter CC content "(CC) = 16" is read, and the content (CAT ₁₆ ) is "(CAT ₁₆ ) = 0".
Is it "(CAT ₁₆ ) >0" or "(CAT ₁₆ ) >
0". Channel assignment tables CAT ₁ to CAT ₁₆ provided corresponding to each pronunciation channel are used to assign channels to keys that are pressed, as explained using Table 24 (Part 1) to (Part 2) above. If it is a blank channel, its content will be a negative value, and if it is a blank channel, its content will be "0".
~15'' (in decimal notation) indicates a positive value. This positive value corresponds to the truncate rank value and indicates that the oldest released key was assigned to the channel indicating "0". Therefore, the parameter assignment for the newly pressed key is done in the channel assignment table CAT ₁ ~
It is only necessary to allocate it to the channel assignment table CAT of the channel whose contents indicate "0" among CAT ₁₆ . In this example, if the number of set series is 2 series, the channel assignment table
Among CAT ₁ to _{CAT 16} , channel assignment table whose contents indicate "0" CAT ₁ to CAT 1
Among CAT ₁₆ , the first series sound is assigned to the channel assignment table CAT whose contents indicate "0", and the second series sound is assigned to the channel assignment table CAT whose contents indicate "1". There is. Assume now that the number of series set for both the upper keyboard UK and lower keyboard LK is 2 series, and the channel assignment table corresponding to each sound channel.
It is assumed that the contents of CAT ₁ to CAT ₁₆ are as shown in Table 28 Part 1 to Part 2 below. That is,
Currently, the 16th, 13th, 7th, 5th, 3rd, and 2nd channels are blank parameters, and the truncation ranking values TRi of these channels are "2", "0", "1", and "2", respectively. 3,” “4,” and “5.” In addition, the 1st and 2nd series tones corresponding to the pitch "F ₁ " of the pedal keyboard PK are assigned to the 15th channel and the 14th channel, respectively, and
Upper keyboard for channel 12 and channel 10
The second series tones and the first series tones corresponding to the UK pitch "D ₃ " are respectively assigned. In addition, the 11th channel and the 9th channel are respectively assigned the 1st and 2nd series tones corresponding to the pitch "G ₃ " of the upper keyboard UK, and the 8th and 6th channels are assigned the lower keyboard LK pitch. A second series of tones and a first series of tones corresponding to pitch "C ₂ " are respectively assigned.

[Table] Furthermore, the first series of tones and the second series of tones corresponding to the pitch "E ₂ " of the lower keyboard LK are assigned to the fourth channel and the first channel, respectively. In this state, if an on-event message regarding the pitch "C ₃ " of the upper keyboard UK is newly transferred from the first processor section 100, the key code KC corresponding to this pitch "C ₃ " is (000100000) to any channel, first in step 2017 the 16th
The contents of the channel assignment table CAT ₁₆ corresponding to the channel are examined. In this example, the 16th
The channel is an empty channel, and the truncation ranking value TRi is "TRi=2".
That is, the content of the channel assignment table CAT ₁₆ for the 16th channel is "(CAT)=2". Therefore, the program execution branches from step 2017 to step 2018, where the subtraction instruction "(CAT)←(CAT)" is executed.
- (DNr)”. Then, the content of the channel assignment table CAT ₁₆ for the 16th channel (CAT ₁₆ ) is obtained by subtracting the number of upper keyboard UK series "2" stored in the series number set register DNr from the current value "2". By doing so, “(CAT ₁₆ )=0”. When this process is completed, the program execution moves to step 2019, where the channel assignment table specified by the contents of the channel counter CC is entered.
Determine whether the content of CAT ₁₆ (CAT ₁₆ ) is "(CAT ₁₆ ) ≧ 0" or "(CAT ₁₆ ) <0". As a result of this judgment process, the contents of the channel assignment table CAT ₁₆ (CAT ₁₆ ) become “(CAT ₁₆ ) <
0”, the contents of the channel assignment table CAT ₁₆ (CAT ₁₆ ) before executing the subtraction instruction in step 2018 are the values of “0<(CAT ₁₆ )<2”, that is, “(CAT ₁₆ )=1”. It turns out that this channel 16 has a new key to press, the upper keyboard.
It turns out that all you have to do is assign the second series of sounds from UK's C _3rd edition. However, as in this example, step 20
If the content of the channel assignment table CAT ₁₆ before executing the subtraction instruction in step 18 is "(CAT ₁₆ ) = 2", the judgment result in step 2019 is "(CAT ₁₆ ) ≧ 0", and the priority is It is found that there are other channels with higher truncation ranks and values, and the program execution continues at step 20.
21, and here the channel counter
Decrement the contents of CC to make "(CC) = 15". After this, the process moves to step 2022, where the content of the channel counter CC is "correct".
or whether it is "0".
That is, it is determined whether the contents of channel assignment tables CAT ₁₆ to _{CAT 1} of all channels have been inspected. In this case, the content of the channel counter CC is "15" and the processing of all channels has not been completed, so the program execution returns to step 2017 by branching from step 2022, and this time the new content of the channel counter CC is "15". (CC) = 15'', we move on to inspecting the contents of channel assignment table CAT ₁₅ for the 15th channel. In this example, channel 15 has a pedal keyboard.
Since the first series tone corresponding to the pitch “F ₁ ” of PK is assigned, the judgment result in step 2017 is “(CAT ₁₅ ) < 0”, and the program execution is executed using the decrement command “(CAT 15 ) < 0” in step 2021. CC）←
(CC)-1” and set “(CC)=14”. Then, again at step 2022, the judgment command “(CC)
=0? ”, the program execution returns to step 2017, and the contents of the channel assignment table CAT ₁₄ of the 14th channel are checked based on the new contents of the channel counter CC, “(CC)=14”. As a result of repeating such processing, when it is found that the contents of the channel assignment table CAT ₁₃ of the 13th channel is "(CAT ₁₃ ) = 0", the program execution branches to step 2023 from step 2017. , the upper keyboard is a new key to press for channel assignment table CAT ₁₃ .
Processing is performed to allocate the first series of tones corresponding to pitch C ₃ in the UK. That is, in step 2023,
Upper keyboard for channel assignment table CAT ₁₃
Key code KC corresponding to UK C ₃ key
"000100000" and the BSYG flag are loaded, and the key code KC "000100000" corresponding to the _C3 key is also loaded into the key code table KCT ₁₂ corresponding to the 13th channel. Once this process is complete, program execution will proceed to step 2.
024, where initial settings are made to calculate a series of primary tone parameters G ₁ [CA] to _{G 1} [M ₂ ] regarding the _C3 key. A detailed flowchart of this PRG onset routine is shown in FIG. In FIG. 19, program execution progresses from step 2023 of the channel assignment routine to step 2050 of the PRG onset routine.
At step 2050, the parameter counter PC provided in the second arithmetic unit 201 is set to "6" as an initial value. Then, in the next step 2051, the channel counter CC at this time corresponds to the 13th channel specified by the content "(CC) = 13" and the parameter counter PC content "(PC) = 6". Among the unit words of the parameter calculation register PRG ₁₃ , "0" is loaded and cleared in the T area that stores the calculation parameter Tm related to the calculation cycle, and data "A" is loaded in the JA area that stores the jump address JA. be done. This data “A” includes various musical tone parameters G [CA] to G
This is address information corresponding to the starting address of an initial routine that performs initial settings for calculating [M ₂ ] sequentially and time-divisionally. Once this process is complete, the program returns to the channel assignment routine and
Execute the load instruction in step 2025. In other words, the initial touch data ITD (IZs) for each calculation parameter temporarily stored in FIPO1
[CA], IZs [LA], IZs [CT], IZs [Pi], IZs
[MI], IZa[M ₂ ]) is loaded for each calculation parameter into the initial data register IZDr ₁₃ corresponding to the 13th channel. This completes the channel assignment of the first series of tones corresponding to the pitch C ₃ of the upper keyboard UK and the initial settings for calculating the tone parameters corresponding to the pitch C ₃ assigned to this channel. Thereafter, the program execution moves to step 2026, where the contents of the second series set flag register F2Sr are cleared. The processing in step 2026 has an effective meaning when the second sequence sound is assigned to any channel. After this, the program execution moves to step 2021, where the contents of the channel counter CC are decremented to make the contents "(CC)=12". Thereafter, execution of the program returns to step 2017 by branching to step 2022, and this time processing is performed to assign a channel to the second series of tones corresponding to the _C3 key. In other words, this time, among the channel assignment tables CAT ₁ to CAT ₁₆ , a table whose content is "1" is detected from CAT ₁₂ to CAT ₁ , and the second series tone corresponding to pitch C ₃ is assigned to this table. Perform processing to allocate. Therefore, again in step 2017, the determination command "(CAT)?" is used to determine whether the content of the channel assignment table CAT ₁₂ specified by the content of the channel counter CC "(CC)=12" is positive or negative. However, in this example, other keys have already been assigned to the 12th to 8th channels, so the determination result in step 2017 is "busy" for the 12th to 8th channels. Then, as a result of repeating the same process, if it is found that the content of the channel assignment table CAT ₇ of the 7th channel is "(CAT ₇ ) >0", the program execution will proceed to step 2018.
, and here the subtraction instruction “(CAT) ←
(CAT)-(DNr)”. Then, the contents of channel assignment table CAT ₇ (CAT ₇ ) are as follows:
Series number set register from current value “1”
By subtracting the memory content “2” of DNr, “(CAT ₇ )<0” is obtained. Then, in the next step 2019, the channel assignment table
Determine whether the content of CAT ₇ is positive or negative. As a result of the judgment process, if it is found that the second series tone corresponding to pitch C ₃ should be assigned to the channel assignment table CAT ₇ of the seventh channel, the program execution moves to the next step 2020, The key code KC that will be assigned to the channel from now on is the second key code to indicate that it is related to the second series of sounds.
A flag of "1" is set in the series set flag register F2Sr. After this, the program execution moves to step 2023, where the pitch C ₃
As _in the case of _the first series sound corresponding to
The key code KC "000100000" corresponding to the key, the busy flag BSYFG and the second series flag specified by the contents of the second series set flag register F2Sr
F2S is loaded into a given bit position. At the same time, the key code corresponding to the C ₃ key is also added to the key code table KCT ₇ corresponding to the 7th channel.
KC "000100000" is loaded. When this process is completed, the program execution sequentially moves to steps 2014 to 2026, and the pitch
Processing similar to the processing regarding the first series of sounds of _C3 is executed. However, in the processing related to the second series of sounds,
Load command of step 2026 “(F2Sr)←0”
has a valid meaning, and the contents of the second series set flag register F2Sr are thereby cleared. With the above program, channel assignment of the first and second series notes corresponding to the pitch C ₃ of the upper keyboard UK has been completed, but after this the program execution moves to step 2021. decrements the contents of channel counter CC. Then, according to the judgment command in step 2022, the contents of the channel counter CC are changed to "(CC)=
0”. As a result of this judgment process, if the content of the channel counter CC is "(CC)>0", step 2017 is executed again.
Go back and perform the same process as above. That is, in step 2017, the content of the channel assignment table CAT ₆ specified by the new content "(CC)=6" of the channel counter CC is determined. In this example, the first series of tones corresponding to pitch _C2 of the lower keyboard LK has already been assigned to the sixth channel, so step 201 at this time
The judgment result in step 7 is busy, the program moves to step 2021, and the channel counter CC
Decrement the content of and make it "(CC) = 5",
Thereafter, the process returns to step 2017 via the branch of step 2022. Then, in step 2017, the content of the channel assignment table CAT ₅ specified by the new content "(CC)=5" of the channel counter CC is determined. Then, in this example, the content of channel assignment table CAT ₅ is "(CAT ₅ ) = 3", so the program execution moves to step 2018, where the subtraction instruction "(CAT) ← (CAT )−(DNr)”. Then, the contents of the channel assignment table CAT ₅ for the 5th channel are "(CAT ₅ ) =
1”. When this process is completed, in the next step 2019, it is determined whether the contents of the channel assignment table _CAT5 are positive or negative. As a result of this judgment process, it is found that the contents of the updated channel assignment table CAT ₅ are "(CAT ₅ ) ≧ 0", so the program execution moves to step 2021, where the contents of the channel counter CC are downloaded. Clement and set "(CC) = 4", then step 20
The process returns to step 2017 via branch 22. Thereafter, the same processing as in the above case is performed for the fourth channel to the first channel.
For the 3rd channel and 2nd channel, channel assignment table CAT ₃ and
Since the contents of CAT ₂ are both "positive," the contents are updated by the subtraction instruction in step 2018. In other words, the channel assignment table
The contents of CAT ₃ are updated to "(CAT ₂ )=2" and the contents of channel assignment table CAT ₂ are updated to "(CAT ₂ )=3". Thereafter, the content of the channel counter CC becomes "(CC)=0", and the program execution returns from step 2022 to the main routine. As is clear from the above, Step 20
18 subtraction instruction “(CAT)←(CAT)−(DNr)”
The judgment command "(CAT)?" in step 2019 indicates that the blank channel specified by the contents of the channel counter CC is the first key pressed.
This function detects whether a channel should be assigned a sequenced sound or not, and at the same time detects the truncation ranking value of blank channels that have a set number of sequences or more.
Truncate rank value TRi of channel with TRi
It also has the function of sequentially updating from a larger number to a smaller number. As a result, channel assignment to a new key to be pressed thereafter is executed based on this updated truncate rank value TRi. In this example, if the C ₄ key of the upper keyboard UK is subsequently pressed, the first series note corresponding to the pitch C 4 will be assigned to the 16th channel, and the 5th channel will be assigned the first series tone corresponding to the pitch C ₄ . A second series of tones corresponding to pitch _C4 is assigned. By the way, the above explanation is for the case where the set number of series for both the upper keyboard UK and the lower keyboard LK is "2 series", but when the set number of series is "1 series", the truncate rank value TRi A new pressed key is assigned to the channel whose value is "0", and the update amount of the truncation ranking value TRi of the blank channel becomes "1". Therefore, in the electronic musical instrument of this embodiment, the method of channel assignment differs depending on the set value of the number of tone sequences, and complex truncation control can be realized. Note that the empty channel truncation ranking value TRi updated in this channel assignment routine is also updated when the release end of the release key is detected. This will be discussed later. (Channel Allocation Release Flow) Next, the channel allocation release flow from step 2030 shown in FIG. 18b will be described. First, when it is found in step 2010 that the forwarded message from the first processor unit 100 is related to a key off event,
Program execution moves to step 2030,
The load instructions in step 2030 load the channel counter CC with an initial value of ``16'', the parameter counter PC with an initial value of 6, and the priority set register PRSr with an initial value of 0. is loaded, and "-1" is loaded into the first series and second series channel number registers CNr ₁ and CNr ₂ . When this process is completed, the program execution moves to step 2031, where the key code KC assigned to the channel assignment table CAT specified by the contents of the channel counter CC is the same as the key code KC corresponding to the release key. And it is determined whether or not it corresponds to the channel assignment table CAT regarding the first series of sounds of the release key. If the key code KC assigned to the channel assignment table CAT and the key code KC of the release key are the same, and the channel assignment table CAT is
If it is determined that the key is related to a series note, the program execution moves to step 2032, where the load command "(ONr ₁ )←(CC)" is executed, and the first series note of the release key is assigned. The channel number (contents of the channel counter) is stored in the first series channel number register CNr _1.
temporarily memorize it. After this, step 2033
The process moves to the PRG offset routine, where processing for release control regarding the first series of tones of the release key is performed. Furthermore, this PRG
The offset routine will be explained in detail later. On the other hand, the judgment command in step 2031 determines that the key code KC assigned to the channel assignment table CAT specified by the contents of the channel counter CC is the key code KC corresponding to the release key.
If the key code KC assigned to the channel assignment table is different from the key code KC corresponding to the release key, the program execution moves to step 2034. Here, the second series set flag register F2Sr is set to “1”.
Load. 2nd series set flag register
The reason why "1" is loaded into F2Sr is to determine in the next step 2035 whether the key code KC assigned to the channel assignment table CAT relates to the second series of sounds. When this process is completed, the program execution moves to the next step 2035, where the key code KC assigned to the channel assignment table CAT specified by the contents of the channel counter CC is the key code corresponding to the release key. It is determined whether they are the same and the table relates to the second series of sounds. As a result of this judgment process, the corresponding channel assignment table
If it is found that the key code KC assigned to CAT is the same as the key code KC corresponding to the release key, and that the channel assignment table CAT is related to the second series of sounds, the program execution proceeds to step 2036. Here, the channel number to which the second series tone of the release key is assigned is temporarily stored in the second series channel number register _CNr2 . Thereafter, the process moves to step 2033, the PRG offset routine, where processing for release control regarding the second series of tones of the release key is performed. However, as a result of the judgment process in step 2036,
The key code corresponding to the key code KC and release key assigned to the channel assignment table CAT specified by the contents of the channel counter CC.
If KC is different, the program goes to step 20.
35 to 2037. In step 2037, the contents of the priority set register PRSr (PRSr) and the contents of the channel assignment table CAT (CAT) are compared,
If (CAT) > (PRSr), the channel assignment table CAT corresponds to a blank channel.
It is also found that the channel has a truncate order value TRi that is a lower priority (larger value) than the highest priority truncate order value "0" initially set in the priority set register PRSr, and this low priority truncate order value is TRi is the next step 2038 load instruction “(PRSr)←
(CAT)” to set the priority register.
PRSR transfers are stored. Conversely, step 2037
As a result of the comparison process, if it is found that (CAT) < (PRSr), the corresponding channel assignment table
CAT is determined to correspond to either a channel to which a pressed key other than the release key has already been assigned, or a blank channel with a higher priority than the truncate priority indicated by the truncate order value TRi at this time, and the program The execution moves to step 2039. Here, similar to the channel allocation flow, this channel allocation release flow will be explained using an example. For example, the contents of the channel assignment tables CAT ₁ to CAT ₁₆ before the key off event message is transferred from the first processor unit 100 are as shown in Table 28 Parts 1 to 2 above, and now Assume that the D ₃ key of the upper keyboard UK, which is currently assigned to the 12th channel and the 10th channel, has been released. First, in step 2031, it is determined whether the note assigned to the channel assignment table CAT ₁₆ specified by the content of the channel counter CC "(CC) = 16" corresponds to the first series note of the release key D ₃ . Inspect. In this example, the channel assignment table CAT ₁₆ for the 16th channel is blank, and its contents (CAT ₁₆ ) are "(CAT ₁₆ )=2". Therefore, the program execution moves to step 2034, where "1" is loaded into the second series set flag register F2Sr. And next step 20
In step 35, it is checked whether the sound assigned to the channel assignment table CAT ₁₆ of the 16th channel corresponds to the second series of sounds of the release key _D3 . However, since the 16th channel is a blank channel, the program execution moves to step 2037, where the contents of the channel assignment table _CAT16 and the contents of the priority set register PRSr are compared. Then, since "(CAT ₁₆ ) = 2", the program execution moves to step 2038, where the contents of the channel assignment table CAT ₁₆ , that is, the truncate rank value TRi ("2") are stored in the priority set register PRSr. Transfer to and store.
Therefore, in the process up to this point, it has been found that the release key _D3 is not assigned to the 16th channel, and the program execution continues at step 203.
9, the decrement instruction "(CC)←(CC)-1" of this step 2039 is executed to update the contents of the channel counter CC to "(CC)=15". Thereafter, the process moves to step 2040, where the second series set flag register F2Sr loaded with "1" in step 2034 is cleared. When this process is completed, the next step 20
In step 41, it is determined whether the contents of the channel counter CC are "(CC) = 0", but in this case, since "(CC) = 0" is not determined, the process returns to step 2031, and in step 2039, the updated channel counter CC is determined. The contents of the following channel assignment table CAT ₁₅ will be inspected based on the contents "15" of . In other words, as a result of the judgment process in step 2041,
Since "(CC) = 15", the program execution returns to step 2031, and in this step 2031, the first series note of release key D ₃ is assigned to the channel assignment table CAT ₁₅ of the 15th channel. Check whether it is applicable. However, in this example, the 15th channel has a pedal keyboard.
Since the first series note corresponding to the pitch _F1 of PK is assigned, the program execution starts at step 203.
1 to 2034, and this step 2034
After loading "1" into the second series set flag register F2Sr, step 2035 → step 2037 → step 2039 → step 20
40→Step 2041→Step 2031. Based on the updated content of channel counter CC "(CC) = 14", does it correspond to the first series note of release key D ₂ or the second series note assigned to the 14th channel? Inspect whether However, in this example, the 14th channel has the pitch F ₁ of the pedal keyboard PK.
A second series of sounds corresponding to is assigned. Therefore, the program execution is the same as in the case of the 15th channel, from step 2031 → step 2034 →
Step 2035 → Step 2037 → Step 2039 → Step 2040 → Step 2041
→ Step 2031, and so on.
And again, the updated channel counter
Based on the content of CC "(CC)=13", it is checked whether the 13th channel is assigned to the first series of sounds or the second series of sounds of release key _D3 . However, in this example, the 13th channel is a blank channel, and the contents of the channel assignment table CAT ₁₃ are "(CAT ₁₃ )=0". Therefore, the program execution is the same as in the case of the 16th channel, from step 2031 to step 2.
Step 034→Step 2035→Step 2037 is sequentially executed. Then, in step 2037, the content "(CAT ₁₃ )=0" of the channel assignment table CAT ₁₃ is compared with the content "(PRSr)=2" of the priority set register PRSr. As a result of this comparison process, if it is found that "(CAT) >(PRSr)" is not true, the program execution will proceed to step 2.
The process moves directly from step 037 to step 2039, then moves to step 2039→step 2040→step 2041, and returns to step 2031 again. Then, based on the updated channel counter CC content "(CC) = 12", the 12th channel is assigned to the first series note or the second series note of release key C ₃ . Inspect whether or not. Then, in this example, since the second series of sounds of release key D ₃ is assigned to the 12th channel, the program execution will proceed to step 2034.
→ Step 2035 → Step 2036, and in Step 2036, the second release key D ₃ is
Set the channel number "12" to which the series sound is assigned to the second series channel number register CNr ₂
temporarily memorize it. Thereafter, in step 2033, processing for release control regarding the musical tone generated in the 12th channel is performed. and,
When this process is completed, the program execution proceeds from step 2039 → step 2040 → step 20.
41, and returns to step 2031 again. From now on, we will process the 11th channel, but the 11th channel will contain the upper keyboard UK pitch.
Since the first series sound corresponding to G ₃ is assigned, the program moves through the same steps as for the 15th channel described above, and then returns to step 2031.
Return to From now on, processing will be performed regarding the 10th channel, but since the 1st series of sounds of the release key D ₃ is assigned to the 10th channel, the program execution will move from step 2031 to step 2032, and this step Release key at 2032
The channel number "10" to which the first series sound of D ₃ is assigned is temporarily stored in the first series channel number register CNr ₁ . After this, step 2
At step 033, release control processing regarding the generated musical tone of the 10th channel is performed. When this process is completed, the program execution will proceed to step 2.
039→Step 2040→Step 2041, and then return to Step 2031 again. From then on, from the 9th channel to the 1st
The same process is performed up to the channel, but the most important process is the process of updating the contents of the priority set register PRSr in steps 2037 and 2038. That is, the priority set register
The contents of PRSr (PRSr) are updated to "(PRSr) = 2" in the process of executing processing related to the 16th channel, and updated to "(PRSr) = 3" in the process of executing processing related to the 5th channel. . After that, in the process of executing the process related to the third channel, it is updated to "(PRSr)=4", and further, in the process of executing the process related to the second channel, "(PRSr)=4" is updated.
5'' and finally stores and holds the truncate order value TRi corresponding to the lowest priority among the truncate order values TRi of all blank channels. Then, the processing related to the first channel is completed, and the contents of the channel counter CC are changed to “(CC)=
0, the program execution will proceed to step 20.
41 to step 2042, where the first series channel number register CNr ₁
Determine whether the content of is positive or negative. The first channel number register CNr ₁ and the second channel number register CNr ₂ are each loaded with "-1" as an initial value in step 2030, and then released in the process of processing for all channels from step 2031 to step 2041. The channel numbers to which the first series tones and the second series tones of key D ₃ were assigned are respectively loaded and become "(CNr ₁ )=10" and "(CNr ₂ )=12". Therefore, the program execution moves to step 2043, where the content of the first channel number register CNr ₁ is changed to "(CNr ₁ ) = 10".
For the channel assignment table CAT ₁₀ of the 10th channel specified by , the value obtained by adding "+1" to the contents of the priority set register PRSr (PRSr), that is, "(PRSr)+1=5+1=6"
Load. In other words, the 10th channel is a blank channel, and the channel assignment table is
Let the content of CAT ₁₀ be "(CAT ₁₀ ) = 6". After this, the judgment command in step 2044 is "(CNr ₂ )?"
Execute 2nd series channel number register
Determine whether the contents of CNr ₂ are positive or negative. Then,
Since "(CNr ₂ ) = 12", the program execution moves to step 2045, where the 12th channel number specified by the content "(CNr ₂ ) = 12" of the second channel number register CNr ₂ is For the channel assignment table CAT ₁₂ of the channel, the value obtained by adding "+2" to the contents of the priority set register PRSr (PRSr), that is, "(PRSr)+2=
5+2=7” is loaded. That is, the 12th channel is set as a blank channel, and the contents of the channel assignment table CAT ₁₂ are set as "(CAT ₁₂ )=7". By the way, in this case, the first processor section 100 outputs channel assignment tables CAT ₁ to CAT _14.
Off-event messages that are not assigned to any of these may be forwarded. Such a situation occurs under the following conditions. In other words,
Although it is registered in the key-on file KOF of the 1st processor section, the upper keyboard UK or lower keyboard LK
The number of pronunciation series is set to "2", and the number of keys pressed in the upper keyboard UK and lower keyboard LK is large,
This occurs when the required number of sounding channels exceeds the actual number of sounding channels set for the electronic musical instrument. For example, a 16 channel assignment table
If there is only one blank channel among CAT ₁ to _{CAT 16} , and an on event that requires two channels of sound occurs, only the first series of sounds will be used in the channel assignment table.
It happens that it is not assigned to CAT. Also, when a new on-event occurs, if all channel assignment tables CAT ₁ to CAT ₁₀ are set to busy channels, there is no channel to which the musical tone related to this new on-event should be assigned, and the key press Channel allocation may not be performed even if the Regarding the off event that occurs under the conditions of the former example, only the first series sound is assigned, so its channel number is set to step 2032.
Then, by executing the instructions in steps 2042 and ₂₀₄₃ , the corresponding channel assignment table CAT is made blank and a predetermined truncation order value TRi is loaded. . However, since the second series of sounds has not been assigned, the determination result in step 2044 is "CNr ₂ <0", and the program execution directly returns to the main routine without passing through step 2045. Furthermore, regarding the off event that occurs under the conditions of the latter example, since neither the first series sound nor the second series sound is assigned, the judgment results in step 2042 and step 2044 are respectively "(CNr ₁ ) <0" and "(CNr ₂ )<0", and the program returns directly to the main routine from step 2042 without executing the process of step 2043. Therefore, channel assignment table CAT ₁ ~
When the contents of CAT ₁₆ are as shown in Table 28 Parts 1 and 2, as a result of the release of the D ₃ key of the upper keyboard UK assigned to the 12th channel and the 10th channel, the 12th channel and Channel assignment table corresponding to blank channels including channel 10 CAT ₁₆ , CAT ₁₃ , CAT ₁₂ , CAT ₁₀ ,
The contents of CAT ₇ , CAT ₅ , CAT ₃ , and CAT ₂ are as follows:
The result will be as shown in the table.

[Table] Next, a parameter calculation routine for calculating various musical tone parameters and frequency parameters regarding a new pressed key assigned to a channel by the channel assignment flow described above will be described. The PRG offset routine in the above channel allocation flow will be explained after the parameter calculation routine has been explained. (Parameter Calculation Routine) FIGS. 20 to 27 are detailed flowcharts showing one embodiment of the parameter calculation routine. First, the musical tone parameters G [CA], G [LA], G calculated by this parameter calculation routine.
The calculation formulas for [CT], G[Pi], G[M ₁ ], and G[M ₂ ] will be explained. The musical tone parameters G regarding the attack part, decay part, and sustain part of the generated musical tone
[CA] to G[M ₂ ] are calculated by the following Equations 25 to 42, and for the release part, only the tone parameters G[M ₁ ] and G[M ₂ ] related to the amplitude are calculated.
Calculated based on formulas 43 to 44. (a) Attack part G [CA] at = {Zs [CA] + Zm [CA] +
Zm〔BL〕｝＋MDs〔CA〕＋
n・m [CA]×Δ・m
[CA] ...(25) G[LA]at={Zs[LA]+Zm[LA]+
Zm〔BL〕｝＋MDs〔CA〕＋
n・m [LA]×Δ・m
[LA] ...(26) G[CT]at={Zs[CT]+Zm[LA]+
Zm〔BL〕｝＋MDs〔CA〕＋
n・m [CT]×Δ・m
[LA] ...(27) G[Pi]at={Zs[Pi]+Zm[LA]+Zm
[BL]}+MDs[CA]+n・
m [Pi] × Δ・m [Pi]
...(28) G[M ₁ ]at={Zs[M ₁ ]+Zm[M ₁ ]+Zm
[BL]+R[Mi]}+MDs
[CA]+n・m[M ₁ ]×
Δ・m [M ₁ ] ... (29) G [M ₂ ] at = {Zs [M ₂ ] + Zm [M ₂ ] + Zm
[BL]+R[Mi]}+MDs
[CA]+n・m[M ₁ ]×
Δ・m [M ₁ ] ...(30) (b) Decay part G[CA]dc=G[CA]at+MDs[CA]+n・
m [CA] x Δ・m
[CA] ...(31) G[LA]dc=G[LA]at+MDs[LA]+n・
m [LA] x Δ・m
[LA] ...(32) G[CT]dc=G[CT]at+MDs[CT]+n・
m[CT]×Δ・m
[LA] ...(33) G[Pi]dc=G[Pi]at+MDs[Pi]+n・
m [Pi] × Δ・m [Pi]
...(34) G[M ₁ ]dc=G[M ₁ ]at+MDs[M ₁ ]+n・
m [M ₁ ]×Δ・m [M ₁ ]
...(35) G [M ₃ ] dc = G [M ₂ ] at + MDs [M ₃ ] + n・
m [M ₂ ]×Δ・m [M ₂ ]
...(36) (c) Sustain part G[CA]st=G[CA]dc
+MDs[CA]...(37) G[LA]st=G[LA]dc
+MDs[LA]...(38) G[CT]st=G[CT]dc
+MDs[CT]...(39) G[Pi]st=G[Pi]dc
+MDs〔Pi〕……(40) G〔M ₁ 〕st=G〔M ₁ 〕dc
+MDs〔M ₁ 〕……(41) G〔M ₂ 〕st=G〔M ₂ 〕dc
+MDs〔M ₂ 〕……(42) (d) Release part G〔M ₁ 〕re＝G〔M ₁ 〕st＋Δm〔Re〕
...(43) G[M ₂ ]re=G[M ₃ ]st+Δm[Re]
...(44) Here, "at" in G[CA]at~G[ _M2 ]at represents the "VALUE value" of each tone parameter regarding the attack part, and G[CA]dc~G[ _M2 ]
"dc" in dc represents the "VALUE value" of each musical tone parameter regarding the decay part, and G[CA]st~
“st” in G [M ₂ ] st represents the “VALUE value” of each tone parameter regarding the sustain part, and
"re" in [M ₁ ] re to G [M ₂ ] re represents the "VALUE value" of each tone parameter regarding the release part. In addition, Zm [BL] is the indirect calculation parameter BL and corresponding to each musical tone parameter.
The sum of ADRm and key code KC is “BL・
ADRm+KC'' addresses the NST 220, thereby representing calculation parameters for note scaling for the initial values of each tone parameter read from the NST 220. Also, n・m [CA] ~ n・m [M ₂ ] is
Address the n table 240 with the value "n・ADR・m+KC", which is the sum of the indirect calculation parameter n・ADR・m corresponding to each musical tone parameter and the key code KC, and thereby perform the attack read from the n table 240. It represents the calculation parameters regarding the calculation circuit in the section. Also, n・m [CA] ~ n・m [M ₂ ] is
The n-table 240 is addressed with the value "n-ADR-m+KC", which is the sum of the indirect calculation parameter n・ADR・m corresponding to each musical tone parameter and the key code KC. It represents calculation parameters related to the number of calculations in a portion. Also, Δ・m [CA] ~ Δ・m [M ₂ ] is
The Δ table 230 is addressed with the value "Δ·ADR·m+KC" which is the sum of the indirect calculation parameter Δ·ADR·m corresponding to each musical tone parameter and the key code KC, and the attack read from the Δ table 230 is thereby It represents the calculation parameters regarding the increase/decrease value for each calculation cycle in the part. In addition, Δ・m [CA] to Δ・m [M ₂ ] is the value "Δ・ADR・m+KC" which is the sum of the indirect calculation parameter Δ・ADR・m corresponding to each musical tone parameter and the key code KC. Address table 230, thereby addressing Δ table 2
30 represents the calculation parameters regarding the increase/decrease value for each calculation cycle in the Decay portion read from 30. In addition, Δm [Re] is the release data D
The value “Δ・ADR” corresponding to [Re] and the key code KC is added.
ADR+KD” to address the Δ table 230,
As a result, the musical tone parameters G [M ₁ ], G in the release part read from the Δ table 230
This is a calculation parameter regarding the increase/decrease value of [M ₂ ] for each calculation cycle. By the way, in the calculation formulas (25) to (44) mentioned above, the increase/decrease value Δm corresponding to each musical tone parameter
(Δ・m, Δ・m, Δm[Re]) is the calculation parameter Tm (Tm[CA], Tm[LA]...Tm
[Re]) and is added the number of times specified by the calculation parameter n _n (n·m, etc.). Therefore, for example, the "VALUE value" in the attack part of musical tone parameter G [CA] is the 28th
As shown in the figure, it becomes a time function that changes with the cycle of the calculation parameter Tm, and its final value is determined by the above-mentioned
It can be found using formula 25. In this case, the multiplication value “Δm×n _n ” obtained by multiplying the calculation parameters Δm and n _n obtained from the Δ table 230 and the n table 240 by the indirect calculation parameters Δ・ADR and n・ADR, respectively, and “Δ・ADR ₊ KC" and "n・ADR+KC" are the multiplication values "Δm×
If the stored content Δm of the Δ table 230 and the stored content n _n of the n table 240 are determined so that the stored content Δm of the Δ table 230 and the stored content n n of the n table ₂₄₀ are always approximately equal, that is, the stored content Δm of the Δ table 230 and the stored content n _n of the n table 240 If the relationship is set as shown in Fig. 29, the slope up to the final value "n _n
Changes as shown in the figure. That is, by changing the key code KC, a musical tone parameter G [CA] whose final "VALUE value" is the same and the time required to reach this value changes can be obtained. Of course, the rate of change in this case changes depending on the calculation parameter Tm. In this embodiment, such a principle is used to perform note scaling with respect to time changes in each musical tone parameter G[CA] to G[ _M2 ]. Next, the frequency parameter R is calculated based on the calculation formulas (1) to (4) and calculation formulas (25) to (44) described above.
A parameter calculation routine for calculating the musical tone parameters G[CA] to G[M ₂ ] will be explained. When the program execution in the main routine of the second processor unit 200 shifts to the parameter calculation routine, first, step 210 in FIG.
At 0, the musical tone parameter G of each channel
[CA], G [LA], G [CT], G [Pi], G
[M ₁ ], G [M ₂ ] and frequency parameter R
In order to calculate (R ₁ , R ₂ ) sequentially and time-divisionally from the 16th channel to the 1st channel, "16" is loaded as an initial value into the channel counter CC. Next, in step 2101, the parameter counter
"6" is loaded into the PC as an initial value, and the contents of the parameter conversion instruction flag CFGr are cleared. In this case, the contents of the parameter counter PC and the musical tone parameters G[CA] to G of each channel
The calculation contents of [M ₂ ] have a relationship as shown in Table 30 below,

[Table] These musical tone parameters G [CA] ~ G [M ₂ ]
is calculated by a unique calculation routine for each part of the musical tone signal, such as the attack part and the decay part, and which part should be calculated is determined by the JA area of the unit word of the parameter calculation register PRG corresponding to the musical tone parameter. Specified by content.
For example, if the content of the parameter counter PC is "(PC) = 6", the musical tone parameter G [CA]
The contents of the JA area among the unit words of the parameter calculation register PRG corresponding to "(JA) = A ~
E'' executes a calculation routine as shown in Table 31 below.

[Table] This is the other musical tone parameters G [LA] ~ G
The same is true for [Pi], but predetermined calculations are also performed in the release section calculation routine for musical tone parameters G[M ₁ ] and G[M ₂ ]. When the processing in step 2101 is completed, in subsequent steps, the calculation processing of the various parameters for the channel specified by the contents of the channel counter CC is executed in order from G[CA] to G[M ₂ ]. In other words, when "(PC)=6" is loaded as an initial value to the parameter counter PC in step 2101, the program execution starts at the next step 2.
102, where the parameter calculation register corresponding to the 16th channel specified by the content of the channel counter CC "(CC) = 16" is entered.
The contents (T) [CA] of the T area corresponding to the musical tone parameter G [CA] specified by the contents of the parameter counter PC from PRG ₁₆ are read out, and the contents (T) [CA] are changed to "(T) [CA]. ]=0” or “(T)[CA]>0” or “(T)[CA]<
0". If the result of this judgment process is "(T)[CA]=0", the program execution moves from step 2102 to step 2103, and in the subsequent steps, the JA area corresponding to the musical tone parameter G[CA] is Execute the calculation routine specified by the contents of . The judgment processing result in step 2102 is “Tm
[CA] > 0”, musical tone parameter G [CA]
It is assumed that the calculation cycle to which the increase/decrease value Δm [CA] of .
Decrement [CA]. On the other hand, if the determination processing result in step 2102 is "(T)[CA]<0", the channel is determined to be a blank channel, and the program execution moves from step 2102 to step 2120, where the channel counter CC is decrements the contents of , and then branches to step 2121 with the judgment instruction "(CC) = 0?"
Returning to step 101, calculation of each tone parameter G[CA] to G[[ _M2 ] in the new channel is executed. Now, assuming that a new pressed key belonging to the upper keyboard UK is assigned to the 16th channel using the channel assignment flow described above, each tone parameter G in this 16th channel is
The calculation process of [CA] to G[M ₂ ] is performed as follows. In this case, the content (T) [CA] of the T area of the unit word specified by the content of the parameter counter PC of the 16th channel "(PC) = 6" is
Cleared in the PRG onset routine. Therefore, the judgment processing result in step 2102 is "(T) [CA] = 0", and the program execution moves to step 2103, where the content of the parameter counter PC is "(PC) ≧
3". If the content of the program counter PC is “(PC)≧3”, the musical tone parameter G[CA] related to the pitch of the generated musical tone,
Since we are trying to calculate G[LA], G[CT], and G[Pi], we will use the parameter conversion routine (musical tone parameters G[CA] to G[Pi], which will be described later).
In the next step 2104, "1" is loaded into the parameter conversion instruction flag register CFGr in order to instruct that the processing of the routine for creating frequency parameters R ₁ and R ₂ based on the frequency parameters R 1 and R 2 is executed. Conversely, if the content of the parameter counter PC is "(PC) <3", the musical tone parameters G[M ₁ ], which are related to the amplitude value of the generated musical tone, are
Since we are trying to calculate G[M ₂ ], the program execution moves directly from step 2103 to step 2105. After this, the judgment commands in steps 2105 to 2108 are "(JA)=A?", "(JA)=B?", "(JA)=
E? ", "(JA) = D?", "(PC) = among the unit words of parameter calculation register PRG ₁₆ .
It is determined whether the contents of the JA area in the unit word specified by "6" are among (JA)=A to (JA)=D. As mentioned above, the contents of the JA area (JA) are information that specifies the calculation routine to be executed next, such as the attack part calculation routine and decay part calculation routine for each tone parameter G[CA] to G[ _M2 ]. However, the contents of the JA area of the parameter calculation register PRG ₁₆ corresponding to the tone parameter G [CA] are "A", which was loaded in the PRG onset routine described above. Therefore, the program execution starts from step 2105 to step 21.
The process moves to the initial routine of 09. In the initial routine of step 2109, the contents of the parameter counter PC “(PC)=
In this initial routine, the contents of the parameter counter PC are set to (PC). Initial setting of calculation parameters for calculating the "VALUE value" regarding the attack portion of other tone parameters G[LA] to G[M ₂ ] is also performed. (Initial Routine) The detailed flowchart of the initial routine is shown in FIG. When the program execution moves to step 2130 of the initial routine shown in FIG. 21, first, in step 2130, the tone number data regarding the pressed key assigned to the 16th channel is retrieved from the registration register RGNr (Table 23).
TCN is the parameter calculation register PGR. Among the ₁₆ unit words, the TCT of the unit word specified by the content of the parameter counter PC "(PC) = 6".
Load into ADR area. Then, in the next step 2131, the tone number data TCN loaded into the TCT/ADR area, the content of the parameter counter PC "(PC)=6", and the content of the subparameter counter SPC "(SPC)=2" are used. Addresses TCT210, reads out calculation parameter T・m [CA] for attack part calculation of musical tone parameter G [CA] corresponding to tone number data TCN from TCT210, and uses this calculation parameter T・m [CA] for parameter calculation. register
Load into the T area of the unit word specified by "(PC) = 6" among the unit words of PRG ₁₆ . In other words, the calculation parameter T・m regarding the calculation cycle for the attack part calculation of the musical tone parameter G [CA]
Initialize [CA]. Next, in step 2132, the tone number data TCN loaded into the TCT/ADR area of the parameter calculation register PRG ₁₆ , the content of the parameter counter PC "(PC)=6", and the content of the subparameter counter SPC "(SPC ) = 0'', the calculation parameter Zm [CA] regarding the initial value for the attack part calculation of the musical tone parameter G [CA] corresponding to the tone number data TCN is read from the TCT 210, and this calculation parameter Zm [ CA] among the unit words of parameter calculation register PRG ₁₆ , “(PC)=
6" is loaded into the "VALUE" area of the unit word specified. In other words, this step 2132
In this step, an initial value for attack portion calculation of musical tone parameter G [CA] is set. Next, in step 2133, the initial touch data Zs[corresponding to the musical tone parameter G[CA] among the initial touch data related to the pressed keys assigned to the 16th channel is retrieved from the initial data register _ZD16 (Table 23). CA] is read out as the calculation parameter Zs [CA], and the calculation parameter Zs [CA] is stored in the "VALUE" area of the unit word specified by "(PC) = 6" of the parameter calculation register PRG ₁₆ in step 2132. Loaded calculation parameter Zm
[CA] and this added value “Zm [CA] +
Zs [CA]” is loaded into the “VALUE” area of PRG ₁₆ again. When this process is completed, the program execution moves to the next step 2134, where it is determined whether the content of the parameter counter PC is "(PC)≧3". This is the musical tone parameter G
When calculating [M ₁ ], G [M ₂ ], level data R by series in the registration data
This is to weight [Mi] as the initial value,
When "(PC)<3", the series-specific level data R[Mi] is weighted as an initial value in step 2135 (see equations 29 and 30 above). Contents of parameter counter PC is “(PC)≧3”
, the program execution starts at step 213.
4 to step 2136, where the TCT/TCT of the parameter calculation register PRG ₁₆ is
Tone number data loaded into the ADR area
Contents of TCN and parameter counter PC “(PC)=
6" and the content of the sub-parameter counter SPC "(SPC) = 1" to address the TCT210, and from the TCT210, the indirect calculation parameter BL・ADRm[CA] of the musical tone parameter G[CA] corresponding to the tone number data TCN. This indirect calculation parameter BL・
Determine whether the content of ADRm[CA] is "0" or not. When "BL·ADRm[CA]=0", the balance within the keyboard may be flat as shown in Table 20 above, so the program execution moves to step 2139. However, “BL・
When “ADRm[CA]≠0”, “BL・ADRm
The next step 213 is to perform note scaling within the keyboard (relative to the initial value) based on the characteristic curve specified by [CA] (see Figure 15).
In 7, the indirect calculation parameter BL・
The sum of ADRm [CA] and the key code KC of the pressed key assigned to the 16th channel is "BL.
ADRm [CA] + KC" to address the NST 220, read out from the NST 220 the calculation parameter BL [CA] for note scaling for the initial value of the musical tone parameter G [CA], and load this into the A accumulator AccA. Next, in step 2138, the contents of the A accumulator AccA and the contents of the "VALUE" area in the unit word specified by "(PC) = 6" of the parameter calculation register PRG ₁₆ are added, and this added value is Load it into the "VALUE" area again. Therefore, the contents of the "VALUE" area up to this stage, ie, the VALUE value of musical tone parameter G[CA], are as follows. (i) When BL・ADRm=0, VALUE value of G[CA]=Zm[CA]+Zs
[CA] ...(45) (ii) When BL・ADRm≠, VALUE value of G [CA] = Zm [CA] + Zs
[CA] + Zm [BL] ... (46) Next, in the n・Δ set routine of step 2140, the calculation parameter n・m [CA] and the calculation parameter T regarding the number of calculations in the attack part of the musical tone parameter G [CA] are set.・m
Increase/decrease value Δ・m for each calculation cycle specified by [CA]
Perform initial settings for [CA]. A detailed flowchart of this n·Δ set routine is shown in FIG. In FIG. 22, when the program execution moves to this n・Δ set routine, first 215
0, n table address information for reading out the calculation parameter n·m [CA] from the n table 240 is obtained. This n table address information is stored in parameter calculation register PRG ₁₆ “(PC)
TCT・in the unit word corresponding to “=6”
Tone number data stored in the ADR area
Contents of TCN and parameter counter PC “(PC)=
6” and the contents of the sub-parameter counter SPC “(SPC)=3” to address the TCT210 and read out the indirect calculation parameter n.
It is created by adding ADR・Lm and the key code KC stored in the key code table KCT ₁₆ . Then, the n table address information created in this way “n・ADR・m+
KC'' to address the n table 240 and read out the calculation parameter n·m [CA] corresponding to the tone number TCN and key code KC. Then, in the next step 2151, the calculation parameter n·read out from the n table 240 is
m [CA] to parameter calculation register PRG ₁₆
is loaded into the n area in the unit word corresponding to "(PC)=6". These two steps 21
50 and 2151 calculate the calculation parameter n・m
The initial setting of [CA] is completed, and then step 215
2 and 2153, the calculation parameter Δ・m
Initial settings for [CA] are performed. In other words, in step 2152, the Δ
Table address information is created. This Δ table address information is stored in the parameter calculation register as in the case of creating n table address information.
Tone number data TCN stored in the TCT/ADR area in the unit word corresponding to "(PC)=6" of PRG ₁₆ , contents of parameter counter PC "(PC)=6" and sub-parameter counter
TCT210 by SPC content “(SPC)=4”
It is created by adding the indirect calculation parameter Δ・ADR・m read out by addressing , and the key code KC stored in the key code table KCT ₁₆ . Then, the Δ table address information created in this way “Δ・
Address the Δ table 230 with "ADR・m+KC" and read out the calculation parameter Δ・m [CA] corresponding to the tone number TCN and key code KC.
Then, in the next step 2153, the calculation parameter Δ·m read from the Δ table 230
[CA] is the Δ in the unit word corresponding to “(PC)=16” in parameter calculation register PRG ₁₆ .
Load into area. As a result, the processing of the n/Δ set routine is completed, and the program execution returns to the initial routine in _FIG . The contents of the JA area in the specified unit word are "A"
to "B". This means that the initial setting process for calculating the musical tone parameter G [CA] has been completed, and that the next step should be to move on to the attack part calculation process. Next, program execution moves to step 2142, where it is determined whether the content of the parameter counter PC is "(PC)=1". If "(PC) = 1", it is assumed that the initial routine processing of the musical tone parameters G [CA] to G [M ₂ ] of the 16th channel has been completed, and the program execution proceeds to the parameter calculation routine shown in Figure 20. return. However, if "(PC)≠1", musical tone parameters G[CA] to G[M ₂ ] regarding the 16th channel
The process proceeds to step 2143 assuming that the initial routine processing has not yet been completed.
At step 143, the contents of the parameter counter PC are decremented to "(PC)=5". After this, the program is executed at step 2130.
Returning to the parameter counter PC, the updated content “(PC) = 5” allows the tone parameter G
Performs initial routine processing for [LA]. The content of parameter counter PC is "(PC) = 5"
The initial routine processing of the musical tone parameters G[LA] to G[M ₂ ] in the case of ~ "(PC) = 1" is the same as the initial routine processing of the musical tone parameter G[CA], so the explanation thereof will be omitted. do. When the initial routine processing of each tone parameter G[CA] to G[ _M2 ] in the 16th channel is completed in this way, the program execution moves to step 2115 in FIG. 20, where the parameter counter PC is Decrement the contents. Next, the content of the parameter counter PC decremented in step 2116 is determined, and if "(PC)>0", the tone parameters G[CA] to G of the channel at the current time are determined.
It is assumed that the time-division calculation process of [M ₂ ] has not been completed, and the program execution returns from step 2116 to step 2102, where a new parameter counter PC is
The corresponding tone parameters are calculated based on the contents of . But the decremented parameter counter
If the content of the PC is "(PC) = 0", the musical tone parameter G of the channel at the current time
It is assumed that all the time-sharing calculation processes from [CA] to G[M ₂ ] have been completed, and the program execution continues at step 211.
6 to step 2117, where the contents of the parameter conversion instruction flag register CFGr are determined. In this case, the content of the parameter counter PC when the initial routine processing regarding the newly pressed key is completed is "(PC) = 1", and this is changed to "(PC) = 0" by the decrement instruction in step 2115. becomes. Therefore, when the initial routine processing is completed, the program execution proceeds from step 2115 to step 2116.
→Proceed to step 2117. Also, at the start of parameter calculation for a new pressed key, "1" is set in the parameter conversion instruction flag register CFGr.
The parameter conversion instruction flag CFG is loaded. Therefore, the execution of the program moves from step 2117 to the parameter conversion routine of step 2118, where the musical tone parameter G initialized in the above-mentioned initial routine is changed.
Among [CA] to G[M ₂ ], G[CA], G[CT], G
Frequency parameters R 1 , R ₂ are calculated based on [Pi], registration pitch data R [Pi] and registration foot data R [Fe] corresponding to _the pressed key assigned to the 16th channel.
are calculated, and the calculated frequency parameters R ₁ , R ₂ and musical tone parameters G [CA],
G[LA] is sent to the third processor section 300. Thereafter, in the next step 2119, musical tone parameters G[M ₁ ] and G[M ₂ ] calculated in the initial routine are sent to the third processor section 300. The above program completes the initial setting process regarding the new pressed key assigned to the 16th channel. Therefore, in order to calculate the tone parameters G[CA] to G[M ₂ ] regarding the 15th channel from now on, in the next step 2120, the contents of the channel counter CC are decremented to "(CC) = 15". . And next step 21
When the content of the channel counter CC is determined to be "(CC)>0" by the judgment instruction "(CC)=0?" in step 21, the program execution proceeds to step 212.
1 returns to step 2101, and calculation processing of musical tone parameters G[CA] to G[M ₂ ] regarding the 15th channel is performed. For convenience of explanation, it is assumed that only the 16th channel is assigned the key to be pressed. When the content of the channel counter CC becomes "(CC) = 15", the program is executed in step 210.
After initializing the parameter counter PC and clearing the parameter conversion instruction flag register CFGr in step 1, the process moves to step 2102, where the parameter calculation register is cleared.
The contents of the T area in the unit word specified by "(PC)=6" in PRG ₁₅ is "(T)[CA]=0" or "(T)[CA]>
0” or “(T)[CA]<0”. For channels that have no assigned keys, the contents of the T area (T) [CA] will be "(T)
[CA]<0”. Therefore, the program execution is from step 2102 to step 2120.
and here channel counter CC
Decrement the content of and make it "(CC) = 14". This is the same flow from the 14th channel to the 1st channel, and if the content of the channel counter CC becomes "(CC) = 0" after the processing related to the 1st channel is completed, the judgment in step 2121 is made. Command “(CC)=
0? ”, the program execution returns to the main routine of FIG. 17. If the time required to allocate channels and calculate various parameters for all channels does not reach a certain time,
Execution of the program is in a standby state until the timer flag signal TFG is output from the timer 270.
After that, the timer flag signal from the timer 270
When the TFG is output, the program execution starts at step 200 in the main routine (Figure 17).
5→Step 2001→Step 2003 to proceed to the parameter calculation routine again.
Then, various parameters of the 16th channel at the new time are calculated. In this way, the content of channel counter CC is 1.
Each time a cycle is made, time-division calculation processing of various parameters at a new time for the same channel is performed, but the parameter calculation register
In the T area of each unit word specified by "(PC)=6" to "(PC)=1" of PRG ₁₆ , the calculation parameter T・ related to the calculation period which shows a positive value by the initial routine processing is stored. m [CA] ~
T·m [M ₂ ] is stored. Therefore, immediately after the initial routine processing is completed, only the decrement processing of the calculation parameters T.m[CA] to T.m[ _M.sub.3 ] in step 2114 is executed. In other words, the execution of the program moves from step 2101 to step 2.
The process moves to step 102, where the content of the T area in the unit word of the parameter calculation register PRG ₁₆ specified by the content of the parameter counter PC "(PC) = 6" is judged. T) [CA]" is "(T) [CA] >0", so the program is executed at step 2102.
Then, the process moves to step 2114. Then, by the decrement command in step 2114, T.m
The value of [CA] is decremented. When this process is completed, the program execution proceeds to step 2115.
and here the parameter counter PC
decrements the contents of ``(PC)=5'' and returns to step 2102 again after receiving the judgment based on the judgment command in step 2116. Then, this time, the contents of the updated parameter counter PC “(PC)=
5", the inside of the T area corresponding to the musical tone parameter G [LA] is read out, and the content (T) [LA] of the read T area is judged in step 2.
102. However, musical tone parameter G
In the T area corresponding to [LA], the calculation parameter T.
Since m [LA] is memorized, step 2
The judgment processing result by 102 is “(T) [LA] > 0”
Therefore, the program execution moves from step 2102 to step 2114, where the calculation parameter T・m [CA] is decremented, and then in the next step 2115, the contents of the parameter counter PC are decremented and "(PC )=4'', and the process returns to step 2102 again after receiving the judgment based on the judgment command in step 2116. Thereafter, in the same way, the calculation parameters T・m[CT] to T・corresponding to each of the musical tone parameters G[CT] to G[M ₂ ] specified by the contents of the parameter counter PC "(PC)=4 to 1" are calculated. Decrement processing of m [M ₂ ] is executed. Then, when the content of the parameter counter PC becomes "(PC) = 0",
The execution of the program moves from step 2116 to step 2117 due to the branch caused by the judgment instruction in step 2116, where the content of the parameter conversion instruction flag register CFGr is changed to "(CFGr)".
= 1" or "(CFGr) = 0". However, in the steps before this, only the decrement processing of the contents of the T area (T) [CA] to (T) [M ₂ ] specified by the contents of the parameter counter PC is executed, and the tone parameter G
Since no calculations from [CA] to G[M ₂ ] have been executed (step 2104 has not been passed), the parameter conversion instruction flag register CFGr
The content of is "(CFGr)=0". Therefore, the execution of the program moves from step 2117 to step 2119, where the musical tone parameter G of the 16th channel related to the amplitude value is selected.
Only [M ₁ ] and G [M ₂ ] are processed by the third processor section 30.
Perform processing to send to 0. After this, in step 2120, the contents of the channel counter CC are decremented to "(CC=15"), and the process moves on to calculation processing of various parameters of the 15th channel. Each time the contents of CC go through one round, time-division calculation processing of various parameters at _a new time regarding the same channel is performed.
If the contents of the area (T) [CA] to (T) [M ₂ ] indicate positive values, no calculations related to pitch will be performed, and the musical tone related to the amplitude value calculated at the previous time will not be executed. Parameters G [M ₁ ] and G
Only [M ₂ ] is sent to the third processor section 300. In other words, even if the musical tone parameters G [M ₁ ] and G [M ₂ ] related to the amplitude value do not change between the previous time and the current time, the contents of the channel counter CC will change once. This means that musical tone parameters G[CA] to G[Pi] related to pitch are sent to the third processor unit 300 each time ] is decremented by the decrement process in step 2114, and only when the value becomes "0" is a predetermined calculation process (calculation process by an attack part calculation routine, etc.) executed, and thereby the previous time is VALUE value at and at this time
This means that the data is sent to the third processor section 300 only when there is a change in the VALUE value. (Attack section calculation routine) Next, after a certain period of time, the channel counter
The contents of CC have gone through a cycle and become "(CC) = 16", and the tone parameters of the 16th channel G [CA] ~ G
Contents of T area corresponding to [M ₂ ] (T) [CA] ~
(T) Assuming that all the values of [M ₂ ] have become "0", the program execution is as follows: Step 2101 → Step 2102 → Step 2103 → Step 21
04→Step 2105→Step 2106. Then, when the contents of the JA area specified by the contents of the parameter counter PC are read out in step 2106, the contents are "B" (step 2141 of the initial routine).
reference). Therefore, the execution of the program moves from step 2106 to an attack section calculation routine at step 2110, where calculations are performed regarding the attack section of the tone parameter specified by the contents of the parameter counter PC. In addition, each musical tone parameter G [CA] ~ G [M ₂ ]
Contents of T area corresponding to (T) [CA] ~ (T)
The point at which [M ₂ ] becomes "0" differs depending on the values of calculation parameters T・m [CA] to T・m [M ₂ ], and this attack part calculation routine is based on the contents of the T area. This is performed only for musical tone parameters for which the value is "0".
However, below, for convenience of explanation, the above (T) [CA]
The explanation will be made assuming that ~(T) [M ₂ ] become "0" at the same time. FIG. 23 is a diagram showing a detailed flowchart of an attack part calculation routine, a decay part calculation routine, and a sustain part calculation routine,
In this example, the attack part calculation routine and the decay part calculation routine are shared, and when "(JA)=B" or "(JA)=C", the attack part and decay part calculation routine shown in FIG. A partial calculation routine is executed. Therefore, if the judgment result "(JA)=B" is obtained in step 2016 of the parameter calculation routine in FIG.
The process moves to the attack part and decay part calculation routine shown in FIG. And first, the parameter counter
The content (n) [CA] of the n area specified by the PC content “(PC) = 6” is the register for parameter calculation.
It is read from PRG ₁₆ , and it is determined whether the value of the content (n)[CA] of this n area is "(n)[CA]>0" or "(n)[CA]=0". If the value of (n) [CA] is “(n) [CA] > 0”, the calculation parameter Δ・m regarding the increase/decrease value
The number of additions of [CA] is the calculation parameter n・m
It is assumed that the number of times specified by [CA] has not been reached, that is, the VALUE value regarding the attack part of musical tone parameter G [CA] has reached the final target value "n m
×Δ・m” has not been reached, and in the next step 2161, the contents of area n (n) are
Decrement [CA] and then proceed to step 216.
In 2, the VALUE of musical tone parameter G [CA]
The value and the calculation parameter Δ·m [CA] are added, and this added value [VALUE+Δ·m [CA]” is stored again in the parameter calculation register PRG ₁₆ as the VALUE value regarding the musical tone parameter G [CA]. Then, in the next step 2163, the calculation parameter T·m [CA] regarding the calculation cycle is reset to the T area of the unit word specified by "(PC)=6" among the unit words of the parameter calculation register PRG ₁₆ . . This calculation parameter T・
m [CA] is the tone number data as mentioned above.
Contents of TCN and parameter counter PC “(PC)=
6” and the content of the sub-parameter counter SPC “(SPC)=2” is read from the TCT 210. Calculation parameter T・m regarding calculation cycle
When the [CA] reset process is completed, the program execution moves to step 2164, where G[CA] of the parameter calculation register PRG ₁₆ is reset.
Modulation data MDs [CA] is further added to the _VALUE value for in the unit word
Stored as a VALUE value. Therefore, since the calculation parameter Δ·m[CA] is added only once, the VALUE value of the calculation parameter G[CA] at this point is expressed by the following equation 47. VALUE value of G [CA] = {Zm [CA] + Zs
[CA]+Zm[BL]}+Δ・m[CA]
+MDs [CA] ... (47) After this, the program execution returns to the parameter calculation routine shown in Fig. 20, and in step 2115, the contents of the parameter counter PC are decremented to "(PC) = 5", and after this, Step 21
16, the process returns to step 2101, and this time the musical tone parameter G specified by the content of the parameter counter PC "(PC)=5" is returned.
Perform calculations regarding [LA]. In other words, when the content of the parameter counter PC becomes "(PC) = 5",
On the condition that the content of the T area (T) [LA] corresponding to the musical tone parameter G [LA] is "0", the program is executed as follows: Step 2102 → Step 2103 → Step 2104 → Step 21
05→Step 2106→Step 2110, and enters the attack section calculation routine again, where the musical tone parameter G specified by the content of the parameter counter PC "(PC)=5" is entered.
The calculation regarding the attack part of [LA] is performed in the same way as the calculation of musical tone parameter G [CA]. As a result, the unit word specified by the content "(PC) = 5" of the parameter counter PC in the temporary parameter memory TPM ₁₆ has the VALUE value related to the attack part of the musical tone parameter G [LA] shown by the following equation 48. Stored. VALUE value of G [LA] = {Zm [LA] + Zs
[LA]+Zm[BL]}+Δ・m[LA]
+MDs [LA] ... (48) In this way, the musical tone parameter G specified by the content of the parameter counter PC "(PC) = 5"
When the first calculation process belonging to the attack part of [LA] is completed, the program execution returns to the parameter calculation routine shown in FIG. 20, and proceeds to step 2115.
decrement the contents of the parameter counter PC to "(PC) = 4", and then calculate the attack part of the musical tone parameter G [CT] specified by the contents of the parameter counter PC "(PC) = 4". This is done in the same way as in the case of "(PC)=5" described above. From now on, the contents of the parameter counter PC will be changed from "(PC)=4" to "(PC)=
3”, “(PC)=3” → “(PC)=2”, “(PC)=
2" → "(PC) = 1", and the corresponding musical tone parameters G [Pi], G
The calculations regarding the attack portions of [M ₁ ] and G[M ₂ ] are performed in the same manner as in the previous case. Then, the first calculation regarding the attack part of all tone parameters G[CA] to G[M ₂ ] in the 16th channel is completed, and the contents of the parameter counter PC are changed to step 2115 (the 20th
When “(PC)=0” is obtained by the decrement instruction shown in the figure), the program execution starts at step 2116→
The process moves from step 2117 to step 2118, and in step 2118, frequency parameters R ₁ and R ₂ are calculated, and the calculated frequency parameters R ₁ and R ₂ and musical tone parameters G [CA] and G [LA] are transferred. . Thereafter, in the next step 2119, the musical tone parameters G[M ₁ ] and G[M ₂ ] obtained by the first calculation process regarding the attack section are transferred. Through the above processing, the musical tone parameter G
The first calculation process regarding the attack part of [CA] to G[M ₂ ] is completely completed, but in order to execute the calculation regarding the 15th channel, the channel counter is started in the next step 2120.
Decrement the contents of CC to make "(CC) = 15". In this case, if there are no keys to press from the 15th channel to the 1st channel, the program execution will proceed from step 2121 to step 21.
01→Step 2102→Step 2120→Step 2121 are repeated, and when the content of the channel counter CC becomes "(CC)=0" at the stage where the processing related to the first channel is completed, the judgment command "(CC)" of step 2121 is repeated. )=
0? '', the program returns to the main routine shown in FIG. If the time required to allocate channels and calculate various parameters for all channels has not reached a certain time, execution of the program will be in a standby state until the timer flag signal TFG is output from the timer 270. At this time, when the timer flag signal TFG is output from the timer 270, the execution of the program shifts to the parameter calculation routine again through the path of step 2005→step 2001→step 2003 in the main routine. Then, in this parameter calculation routine (Fig. 20), the
Performs calculation processing of various parameters for 16 channels. In this case, the contents of the T area (T) [CA] to T [M ₂ ] corresponding to the musical tone parameters G [CA] to G [M ₂ ] of the parameter calculation register PRG ₁₆ are

[0]
The second calculation is performed in the attack part calculation routine in step 2110 only when .
If [M ₂ ] is a positive value, the values of these (T) [CA] to (T) [M ₂ ] are calculated in step 211.
It is only decremented by the decrement instruction of 4. After that, as a result of repeating this process,
The arithmetic processing of musical tone parameters G[CA] to G[M ₂ ] by the attack part calculation routine in step 2110 results in calculation parameters n・m[CA] to n・m.
It is executed the number of times indicated by [M ₂ ], and then the contents of the channel counter CC go through a cycle and become “(CC)=
16" and the contents of the T area (T) [CA] to (T) [M ₂ ] corresponding to the musical tone parameters G [CA] to G [M ₂ ] of the 16th channel become "0". Then, the program execution is at step 21.
02 → Step 2103 → Step 2104 → Step 2105 → Step 2106 → Step 2
The flow returns to the attack portion calculation routine via the path 110. Then, the musical tone parameters G [CA] to G specified by the contents of the parameter counter PC
Contents of n areas (n) corresponding to [M ₂ ] respectively
On the condition that [CA] ~ (n) [M ₂ ] is "0", the program execution starts at step 21.
60, the process moves to step 2165. In addition, the contents of each n area (n) [CA] to (n) corresponding to musical tone parameters G[CA] to G[M ₂ ]
When [M ₂ ] becomes “0”, the calculation parameter n・
It differs for each parameter depending on the value of m [CA] to n・m [M ₂ ], and this attack part calculation routine is performed only for musical tone parameters for which the content of the n area is "0". It will be. However, below, for convenience of explanation, the above (n)
The explanation will be made assuming that [CA] to (n) [M ₂ ] become "0" at the same time. The transition of the program execution to step 2165 means that musical tone parameters G[CA] to G[M ₂ ]
This means that the calculation process for the attack part has been executed the number of times specified by the calculation parameters n・m [CA] to n・m [M ₂ ], and then the calculation process for the decay part is started. It means should. Therefore, the execution of the program starts at step 2160.
When the process moves to step 2165, preparation processing for calculating tone parameters G[CA] to G[M ₂ ] relating to the decay section is performed in each subsequent step. In other words, in step 2165, TCT21
The calculation parameter T·m [CA] relating to the calculation cycle of the decay section is read from 0 and stored in the T area of the unit word corresponding to G [CA] of the parameter calculation register PRG ₁₆ . In this case, the calculation parameter T・m [CA] is the tone number data TCN, the content of the parameter counter PC "(PC) = 6", and the subparameter counter SPC.
Based on the content “(SPC) = 5” (see Table 19)
Read by addressing TCT 210. Next, in step 2166, JA of the unit word of the parameter calculation register PRG ₁ (C) specified by the content of the parameter counter PC "(PC) = 6".
The contents of the area are read and it is determined whether "(JA)=B" or "(JA)≠B". "(JA)=B"
If so, this is replaced with "(JA)=C" in the next step 2167. This indicates that the calculation regarding the decay part should be performed next. Further, if "(JA)≠B", this is replaced with "(JA)=D" in the next step 2168. This indicates that the operation related to the sustain section should be executed next. In this case, the reason for replacing it with "(JA)=D" is that the program shown in FIG. 23 is commonly used for calculations in the attack section and the decay section. Here, it is assumed that the calculation regarding the attack part has been completed, and that "(JA)=0" has been obtained. Next, in step 2169, the n table 24
Calculation parameter n for the decay part from 0
Create n table address information for reading m[CA]. This n table address information addresses the TCT210 using the tone number data TCN, the content of the parameter counter PC "(PC) = 6", and the content of the subparameter counter SPC "(SPC) = 6" (see Table 19). Indirect calculation parameters n・ADR・m read out
(CA) and the key code KC stored in the key code table KCT ₁₆ . Then, the n table address information created in this way “n・ADR・m[CA]+
KC'' to address the n table 240 and read out the calculation parameter n·m [CA] corresponding to the tone number data TCN and key code KC. The calculation parameters n·m[LA] to n·m[ _M2 ] corresponding to the musical tone parameters G[LA] to G[ _M2 ] are also read out in the same manner. And next step 2
At step 170, the calculation parameter n·m [CA] read from the n table 240 is loaded into the n area of the unit word corresponding to "(PC)=6" of the parameter calculation register PRG ₁₆ . These two steps 2169 and 2170 complete the process of setting the calculation parameter n·m [CA], and then the process of setting the calculation parameter Δ·m [CA] is executed in steps 2171 and 2172. That is, in step 2171, Δ table address information for reading out the calculation parameter Δ·m [CA] from the Δ table 230 is created. This Δ table address information includes the tone number data TCN, the content of the parameter counter PC "(PC) = 6", and the ab parameter counter, as in the case of creating the n table address information described above.
TCT210 by SPC content “(SPC)=7”
The indirect calculation parameter Δ・ADR・m [CA] read by addressing , and the key code KC stored in the key code table KCT ₁₆ .
It is created by adding . Then, with the Δ table address information “(Δ・ADR・m[CA]+KC”) created in this way, Δ table 2
30, and the calculation parameter Δ・m corresponding to the tone number data TCN and key code KC.
Read [CA]. Musical tone parameter G [LA] ~
Calculation parameter Δ・m corresponding to G [M ₂ ]
[LA] to Δ·m [M ₂ ] are also read out in the same manner. Then, in the next step 2172, the calculation parameters Δ・
m [CA] to parameter calculation register PRG ₁₆
is stored in the Δ area of the unit word corresponding to "(PC)=6". Through such processing, the preparation process for calculating the musical tone parameter G [CA] regarding the decay part is completed, and the program execution returns to the parameter calculation routine shown in FIG. Update the contents of the parameter counter PC to “(PC) = 5”
Then, the tone parameter G specified by the new parameter counter PC content "(PC) = 5"
Preparation processing for calculating the decay part of [LA] is performed in the same way as in the case of "(PC)=6" described above. Thereafter, preparation processing for executing calculations regarding the decay part of musical tone parameters G[CT] to G[ _M2 ] specified by "(PC)=5" to "PC)=1" is performed in the same manner. . Then, the preparation process for performing the calculations regarding the attack part and the calculation of the decay part of musical tone parameters G[CA] to G[ _M2 ] in the 16th channel is completed, and the contents of the parameter counter PC are changed to step 2115 (step 2115). When "(PC) = 0" is obtained by the decrement instruction in Figure 20), the program execution proceeds from step 2116 → step 2117 →
The process moves to step 2118, in which the final frequency parameters R ₁ and R ₂ in the attack section are calculated, and the calculated frequency parameters R ₁ and R ₂ and musical tone parameters G [CA] and G [LA] are transferred. Perform processing. Thereafter, in the next step 2119, the tone parameters G[M ₁ ] and G[M ₂ ] obtained by the last arithmetic processing in the attack section are transferred. Through the above processing, all processing related to the attack part in the 16th channel is completed, but in order to execute calculations related to the 15th channel, the contents of the channel counter CC are decremented in the next step 2120. and set "(CC) = 15". In this case, if there are no keys to press for the 15th channel to the 1st channel, the program is executed at step 212.
1→Step 2101→Step 2102→Step 2120→Step 2121 are repeated, and when the content of the channel counter CC becomes "(CC)=0" after the processing regarding the first channel is completed, the judgment command of step 2121 is executed. The process returns to the main routine of FIG. 17 by branching to "(CC)=0?". If the time required to allocate channels and calculate various parameters for all channels has not reached a certain time, the timer 270 sends a timer flag signal.
Program execution is in a standby state until TFG is output. After that, when the timer flag signal TFG is output from the timer 270, the program execution starts from step 2005 in the main routine.
The process returns to the parameter calculation routine via the path from step 2001 to step 2003. In this parameter calculation routine, musical tone parameters G[CA] to G regarding the decay section are
[M ₂ ] is calculated. In this case, the calculation of the musical tone parameters G[CA] to G[M ₂ ] regarding the decay section is the same as in the case of the attack section, the contents of the T area corresponding to the musical tone parameters G[CA] to G[M ₂ ], respectively ( T) [CA] ~ (T) [M ₂ ] is “0”
This _is executed in the Decay part calculation routine in step 2111 on the condition that The contents of the T area are only decremented by the decrement command in step 2114. This decrement processing of the contents (T) [CA] to (T) [M ₂ ] of the T area is executed every time the contents of the channel counter CC go around. (Decary section calculation routine) Next, after a certain period of time, the channel counter
The contents of CC have gone through a cycle and become "(CC) = 16", and the tone parameters of the 16th channel G [CA] ~ G
Contents of T area corresponding to [M ₂ ] (T) [CA] ~
Assuming that (T) [M ₂ ] has become "0", first the tone parameter G specified by "(PC) = 6"
The calculation regarding the decay part of [CA] is executed as follows. In this case, the contents of the JA area (Table 26) corresponding to the musical tone parameter G [CA] specified by "(PC) = 6" are "(JA) = C" (steps in Figure 23). 2167). Therefore, the execution of the program starts from step 2101→step 2102→step 2103 shown in FIG.
→ Step 2104 → Step 2105 → Step 2106 → Step 2107 → Step 210
8→Step 2111, and in the Decay part calculation routine of Step 2111, calculation processing regarding the Decay part of the musical tone parameter G [CA] specified by the content "(PC)=6" of the parameter counter PC is performed. As mentioned above, the Decay section calculation routine is shared with the attack section calculation routine, and a detailed flowchart thereof is shown in FIG. When the program execution moves to the Decay part calculation routine shown in Fig. 23, the parameter counter is first
Contents of n area (n) corresponding to musical tone parameter G [CA] specified by PC content “(PC) = 6”
[CA] is read from the parameter calculation register PRG ₁₆ , and the contents of this n area (n) [CA] are either “(n) [CA] > 0” or “(n) [CA] =
0" is determined. The content of n area (n) [CA] is “(n) [CA]>
0”, the calculation parameter Δ・
The number of additions of m [CA] is the calculation parameter n・
It is assumed that the number of times specified by m [CA] has not been reached, that is, the VALUE value regarding the decay part of musical tone parameter G [CA] has reached the final target value "n.
It is assumed that the content (n) [CA] of this n area has not been reached in the next step 2161, and then in step 2162 the musical tone parameter G [CA] is decremented.
Add the VALUE value and the calculation parameter Δ・m [CA], and this added value “VALUE + Δ・m
[CA]” again to the parameter calculation register PRG _16.
is stored as a VALUE value related to G[CA]. Then, in the next step 2163, the calculation parameter T·m [CA] regarding the calculation cycle is reset to the T area of the unit word specified by "(PC)=6" among the unit words of the parameter calculation register PRG ₁₆ . . Calculation parameter T・m regarding calculation cycle
When the [CA] reset process is completed, the program execution moves to step 2164, where G[CA] of the parameter calculation register PRG ₁₆ is reset.
Modulation data MDs [CA] is further added to the _VALUE value for in the unit word
Stored as a VALUE value. Therefore, the VALUE value of the calculation parameter G[CA] at this point is expressed by the following equation 49 since the calculation parameter Δ·m[CA] is added only once. VALUE value of G [CA] = G [CA] at + Δ・
m[CA]+MDs[CA] (49) In Equation 49, G[CA]at is the VALUE value of the musical tone parameter G[CA] calculated in the attack section calculation routine. After this, the execution of the program returns to the parameter calculation routine shown in FIG.
16, the process returns to step 2101, and this time the musical tone parameter G specified by the content of the parameter counter PC "(PC)=5" is returned.
Perform calculations regarding the decay part of [LA]. In other words, the contents of the parameter counter PC are “(PC)=
5", the program is executed from step 2102 → step 2103 → step 21 on the condition that the contents of the T area (T) [LA] corresponding to the musical tone parameter G [LA] is "0".
04 → Step 2105 → Step 2106 → Step 2107 → Step 2108 → Step 2
111, and enters the decay part calculation routine again, where the calculation regarding the decay part of the musical tone parameter G [LA] specified by the content of the parameter counter PC "(PC) = 5" is calculated as the musical tone parameter G [CA ] is performed in the same way as the calculation. As a result, the unit word specified by the content of the parameter counter PC in the temporary parameter memory TPM ₁₆ "(PC) = 5" contains the decay part of the musical tone parameter G[LA] shown by the following equation 50.
VALUE value is stored. VALUE value of G [LA] = G [LA] at + Δ・
m [LA] + MDs [LA] ... (50) In this way, the musical tone parameter G specified by the content of the parameter counter PC "(PC) = 5"
When the first calculation process regarding the decay part of [LA] is completed, the program execution returns to the parameter calculation routine shown in FIG. 20, and proceeds to step 2115.
decrement the contents of the parameter counter PC to ``(PC) = 4'', and then calculate the decay part of the musical tone parameter G [CT] specified by the contents of the parameter counter PC ``(PC) = 4''. This is done in the same way as in the case of "(PC)=5" described above. From now on, the contents of the parameter counter PC will be changed from "(PC)=4" to "(PC)=
3”, “(PC)=3” → “(PC)=2”, “(PC)=
2"→"(PC)=1", and the corresponding musical tone parameters G[P ₁ ], G
The calculations regarding the decay parts of [M ₁ ] and G[M ₂ ] are performed in the same manner as in the above case. In addition, the musical tone parameter G in the Decay section
Calculation parameters Δ・corresponding to [M ₁ ], G [M ₂ ]
m[M ₁ ] and Δ·m[M ₂ ] are negative values because the musical tone signal level in the decay section generally decreases sequentially. Then, the first calculation regarding the decay part of the musical tone parameters G [CA] to [M ₂ ] in the 16th channel is completed, and the contents of the parameter counter PC are changed to " (FC)=
0”, the program execution goes to step 21.
16→Step 2117→Step 2118, and in Step 2118, the frequency parameters R ₁ and R ₂ are calculated and the transfer processing of the calculated frequency parameters R ₁ and R ₂ and musical tone parameters G [CA] and [LA] is performed. conduct.
Thereafter, in the next step 2119, the tone parameters G[M ₁ ] and G[M ₂ ] obtained by the first calculation process regarding the decay section are transferred. Through the above processing, the first calculation processing regarding the decay part of musical tone parameters G[CA] to G[M ₂ ] in the 16th channel is completed, but now the calculation processing regarding the 15th channel is completed. In order to execute this, in the next step 2120, the contents of the channel counter CC are decremented to "(CC)=15". In this case, assuming that there are no keys to press from the 15th channel to the 1st channel, the program execution will proceed from step 2121 to step 2101 to step 21.
02→Step 2120→Step 2121 are repeated, and after that, when the processing for the first channel is completed, the channel counter is
When the content of CC becomes "(CC) = 0", step 2
The process returns to the main routine of FIG. 17 by branching to the judgment instruction "(CC)=0?" at step 121. If the time required to allocate channels and calculate various parameters for all channels has not reached a certain time, execution of the program will be in a standby state until the timer flag signal TFG is output from the timer 270 (see Fig. 17). (See step 2004 of the main routine shown in Figure 1). Then timer 270
When the timer flag signal TFG is output from the main routine, the program execution proceeds from step 2005 to step 2001 to step 200 in the main routine.
The process returns to the parameter calculation routine via route 3. Then, in this parameter calculation routine (Fig. 20), the 16th
Performs calculation processing of various parameters of the channel.
In this case, musical tone parameters G [CA] ~ G [M ₂ ]
Contents of T area corresponding to each (T) [CA]
The second calculation is performed in the decay part calculation routine of step 2111 on the condition that ~(T) [M ₂ ] is "0", but the contents of the T area (T) [CA] ~ (T) If [M ₂ ] indicates a positive value, the contents of this T area are transferred to step 2114.
It is only decremented by the decrement instruction. Thereafter, as a result of repeating such processing, the calculation processing of musical tone parameters G[CA] to G[M ₂ ] by the decay part calculation routine in step 2111 results in calculation parameters n・m[CA] to n・m.
It is executed the number of times indicated by [M ₂ ], and then the contents of the channel counter CC go through a cycle and become “(CC)=
16'', and the contents of the T area (T) [CA] to (T) [M _{2 ] corresponding to the musical tone parameters G [CA] to G [M 2 ]} of the 16th channel are "0".
Assuming that
04 → Step 2105 → Step 2106 → Step 2107 → Step 2108 → Step 2
The process returns to the decay part calculation routine via path 111. Then, the parameter counter
Musical tone parameter G [CA] specified by the contents of the PC
On the condition that the contents of n areas (n) [CA] to (n) [M 2 ] corresponding to ~G [M ₂ ] are "0", the program is executed _according to the judgment command in step 2160. The branch of step 216
Move to 5. This is the musical tone parameter G [CA]
This means that the calculation process for the decay part of ~G [M ₂ ] has been executed the number of times specified by the calculation parameters n・m [CA] ~ n・m [M ₂ ], and then the sustain part This means that we should move on to arithmetic processing related to Therefore, the execution of the program starts at step 2160.
When the process moves from step 2165 to step 2165, preparation processing for calculating tone parameters G[CA] to G[M ₂ ] related to the sustain section is performed in each subsequent step. The preparation process for calculating the musical tone parameters G[CA] to G[M ₂ ] regarding the sustain section is the same as the preparation process regarding the decay section, so a description thereof will be omitted. In this case, in the processing in _the sustain section, modulation data MDs[ Since only CA] to MDs[M ₂ ] are added, steps 2165 to
Effective processing in the preparation process in step 2172 is based on the calculation parameters T and T in step 2165.
The only steps are the setting process of m[CA] to T.m[M ₂ ] and the replacement process of changing the contents of the JA area corresponding to each tone parameter to "(JA)=D" in step 2168. Then, the preparation process for calculating the decay part and the sustain part of musical tone parameters G[CA] to G[M ₂ ] in the 16th channel is completed, and the contents of the parameter counter PC are changed to step 2115 (step 2115). When "(PC) = 0" is obtained by the decrement instruction in Figure 20), the program execution proceeds from step 2116 to step 2117.
→Proceed to step 2118, and step 2118
In this step, the final frequency parameters R ₁ and R ₂ in the decay section are calculated, and the calculated frequency parameters R ₁ and R ₂ and tone parameters G[CA] and G[LA] are transferred. Thereafter, in the next step 2119, the musical tone parameters G[M ₁ ] and G[M ₂ ] obtained by the last arithmetic processing in the decay section are transferred. Through the above processing, all processing related to the decay section in the 16th channel is completed, but in order to execute calculations related to the 15th channel, the contents of the channel counter CC are decremented in the next step 2120. and set "(CC) = 15". In this case, if there are no keys to press for the 15th channel to the 1st channel, the program execution will proceed to step 21.
21 -> Step 2101 -> Step 2102 -> Step 2120 -> Step 2121 are repeated, and after that, when the content of the channel counter CC becomes "(CC) = 0" at the stage when the processing related to the first channel is completed, the process returns to Step 2121.
Due to the branch of the judgment instruction “(CC)=0?”, the 17th
Return to the main routine shown in the figure. Then, when the timer flag signal TFG is output from the timer 270, the execution of the program shifts to the parameter calculation routine again, as in the case of transitioning from the arithmetic processing related to the attack section to the arithmetic processing related to the decay section. Musical tone parameters related to the sustain section G [CA] ~
Calculation processing of G [M ₂ ] is performed. In this case, musical tone parameters G [CA] to G related to the sustain section
[M ₂ ] is calculated using the contents of the T area (T) [CA] to (T) [M ₂ ] corresponding to the tone parameters G[CA] to G[M ₂ ], respectively, as in the case of the Decay section.
The content of this T area (T) [CA] is executed in the sustain part calculation routine in step 2112 on the condition that the value is "0".
If ~(T) [M ₂ ] indicates a positive value, the contents of this T area are only decremented by the decrement command in step 2114.
This decrementing process of the contents of the T area is executed every time the contents of the channel counter CC go around. (Sustain part calculation routine) Next, after a certain period of time, the channel counter
The contents of CC have gone through a cycle and become "(CC) = 16", and the tone parameters of the 16th channel G[CA]~G
Contents of T area (T) corresponding to [M ₂ ]
Assuming that [CA] to (T) [M ₂ ] have become "0", first calculate the sustain part of the musical tone parameter G [CA] specified by "(PC) = 6" as follows. is executed. In this case, “(PC)=
The content of the JA area corresponding to the musical tone parameter G[CA] specified by "6" is "(JA)=D" (see step 2168 in FIG. 23). Therefore, the program execution starts at step 210.
1 → Step 2102 → Step 2103 → Step 2104 → Step 2105 → Step 21
06 → Step 2107 → Step 2108 → Step 2112, and then Step 2
In the sustain part calculation routine 112, calculation processing regarding the sustain part of the musical tone parameter G[CA] specified by the content "(PC)=6" of the parameter counter PC is performed. The sustain section calculation routine shares some steps with the attack section calculation routine and decay section calculation routine described above, and a detailed flowchart thereof is shown in FIG. Regarding the calculation processing in this sustain section calculation routine, similar to the calculation processing in the attack section and decay section described above, the tone parameters G[CA] to G[M ₂ ] for each channel are calculated in a time-sharing manner and for each parameter. Parameter T・m
It is calculated with a period determined by [CA] ~ T・m [M ₂ ], but T・m [CA] ~ T・m
The increase/decrease value for each calculation cycle determined by [M ₂ ] is the modulation data MDs [CA] to MDs [M _{2 ] corresponding to each musical tone parameter G [CA] to G [M 2 ]} .
Only. This modulation data MDs [CA] ~
The addition process of MDs [M ₂ ] is performed in step 21 in Fig. 23.
64. As a result, each unit word of the 16th channel polar parameter memory TPM ₁₆ contains the VALUE of each tone parameter G[CA] to G[M ₂ ] as shown in the above-mentioned equations 37 to 42.
The value is stored. Processing other than this, namely parameter conversion processing and musical tone parameter G [M ₁ ],
The transfer process of G[M ₂ ] is the same as the process in the attack section and the decay section, so a description thereof will be omitted. The above is an explanation of the arithmetic processing contents of musical tone parameters G[CA] to G[ _M2 ] from the attack section to the sustain section when a new pressed key is assigned to the 16th channel. Next, a description will be given of the calculation processing of musical tone parameters G[CA] to G[ _M2 ] in the release section when the pressed key assigned to the 16th channel is released. In addition, in the arithmetic processing from the attack section to the sustain section mentioned above, each tone parameter G
Calculation parameters T・corresponding to [CA] to G[M ₂ ]
m [CA] ~ T・m [M ₂ ], T・m [CA]
~T・m [M ₂ ] and n・m [CA] ~n・
m [M ₂ ], n・m [CA] to n・m [M ₂ ] are all explained as the same value for convenience of explanation, but in reality, a unique value is set for each musical tone parameter. . Therefore, in this embodiment, the time change speed and change width per unit time of each musical tone parameter G[CA] to G[M ₂ ] and the initial value of the attack part can be individually controlled, and as a result, Complex musical sound waveforms can be easily generated. Also, the above explanation is for the case where a new key to press is assigned only to the 16th channel, but when a key to press is assigned to other channels, the same applies to each channel independently. Of course, it is processed. (PRG Offset Routine) For example, when the pressed key assigned to the 16th channel is released, the channel assignment release process is executed according to the channel assignment release flow shown in FIG. , a preparatory process for calculating tone parameters G[M ₁ ] and G[M ₂ ] regarding the release part of the tone corresponding to this release key is executed. In this case, for the release part of the generated musical tone, the calculation processing of musical tone parameters G[CA] to G[Pi] related to pitch is not performed, and the musical tone parameter G related to the amplitude value is not executed.
Arithmetic processing is performed only for [M ₁ ] and G [M ₂ ]. FIG. 24 shows the PRG of step 2033 in the channel allocation flow shown in FIG. 18b.
This is a diagram showing a detailed flowchart of the offset routine, which shows the preparation process for calculating the musical tone parameters G[M ₁ ] and G[M ₂ ] regarding the release part of the musical tone corresponding to the release key in this PRG offset routine. will be carried out. That is, similar to the preparatory process for calculating the musical tone parameters G[CA] to G[ _M2 ] for the attack and decay sections described above, this PRG offset routine calculates the musical tone parameters G for the release section.
A process for setting the calculation parameter T[Re] regarding the calculation cycle for calculating [M ₁ ] and G[M ₂ ] and the calculation parameter Δ[Re] regarding the increase/decrease value is executed. In this case, the values of the calculation parameters T[Re] and Δ[Re] to be set differ depending on the on/off state of the foot switch. Below, the 24th
This will be explained along the flowchart shown in the figure. When the program execution moves to the PRG offset routine shown in FIG.
At 0, the on/off state of the footswitch is checked. If the foot switch is in the OFF state, program execution moves to step 2181, where the JA area of the unit word specified by "(PC) = 6" in parameter calculation register PRG ₁₆ (Table 26) Replace the contents of with "(JA)=E". In this case, the unit word specified by "(PC) = 6" in the parameter calculation register PRG ₁₆ corresponds to the musical tone parameter G [CA], but the musical tone parameters G [M ₁ ] and G related to the release part
When calculating [M ₂ ], the tone parameter G
Parameter calculation register corresponding to [CA]
PRG ₁₆ T area and JA area and TCT
-The ADR area is also used. This means that the arithmetic processing in the parameter calculation routine (Fig. 20) described above first starts with the musical tone parameter G specified by the content of the parameter counter PC "(PC) = 6".
Since it starts from [CA], if you do not use the above area, "(PC) = 6" ~
This is because the result is that unnecessary processing is performed until "(PC)=3" is reached. When the JA area replacement processing is completed, the content of the parameter counter PC is set to "(PC) = 0" in the next step 2182, and the next step 218
3, the calculation parameter Tm[Re] regarding the calculation cycle of the release portion is read from the TCT 210 and temporarily stored in the working register _WRKr1 . This calculation parameter Tm [Re] is based on the tone number data TCN, the content of the parameter counter PC "(PC) = 0", and the subparameter counter
TCT210 by SPC content “(SPC)=2”
read from the release data area (18th
(see Table and Table 19). Then, in the next step 2184, the indirect calculation parameter Δ·ADRm[Re] regarding the increase/decrease value of the release portion is read out and temporarily stored in the working register _WRKr2 .
This indirect calculation parameter Δ・ADRm
[Re] is determined by the tone number data TCN, the contents of the parameter counter PC “(PC) = 0” and the contents of the sub-parameter counter SPC “(SPC) = 4”.
It is read from the release data area of TCT210. When the above processing is completed, the next step 218
In step 5, the content of the parameter counter PC is set to "(PC) = 6", and after this, the next step 21
At step 86, the calculation parameter Tm [Re] temporarily stored in the working register WRKr ₁ is loaded into the T area of the unit word of the parameter calculation register PRG ₁₆ corresponding to the musical tone parameter G [CA]. Next, in step 2187, the calculation parameter Δ[Re] regarding the release part is set in the Δ table 2.
Δ table address information for reading from 30 is created. This Δ table address information is the indirect calculation parameter Δ・ADRm[Re] stored in working register WRKr ₂ .
and the key code KC stored in the key code table KCT ₁₆ . After this, the Δ table 230 is addressed with the Δ table address information "Δ・ADRm+KC" created in this way, and the calculation parameter Δm[Re] read out is stored in the working register.
Store it temporarily in WRKr ₃ . Next, in step 2188, the content of the parameter counter PC is set to "(PC)=2", and in the next step 2189, the content of the working register is set to "(PC)=2".
Calculation parameter Δm stored in WRKr ₃
[Re] is loaded into the Δ area of the unit word corresponding to the tone parameter G[M ₁ ] of the parameter calculation register PRG ₁₆ . After this, the next step 219
0, the content of the parameter counter PC is set to "(PC) = 1", and in the next step 2191, the calculation parameter Δm[Re] stored in the working register WRKr ₃ is set to the tone parameter G of the parameter calculation register PRG ₁₆ .
Load into the Δ area of the unit word corresponding to [M ₂ ]. By executing each of the above steps, the preparation process when the foot switch is in the OFF state is completed, but when this preparation process is completed, the program execution shifts to the parameter calculation routine shown in FIG. The musical tone parameters G[M ₁ ] and G[M ₂ ] related to the release part are calculated. The calculation of these tone parameters G[M ₁ ] and G[M ₂ ] is as follows:
Parameter calculation register PRG ₁₆ “(PC) =
The calculation parameter Tm [Re] stored in the unit word specified by ``6'' and the musical tone parameter G specified by ``(PC) = 2'' and ``(PC) = 1''.
It is executed based on the calculation parameters Δm[Re] stored in the unit words corresponding to [M <sub>1</sub> ] and G[M <sub>2</sub> ], respectively, and the execution results are the musical tone parameters G[M <sub>1</sub> ] and G[M <sub>2</sub> ]. ] of the unit word corresponding to
Stored sequentially in the VALUE area. Next, the preparation process when the foot switch is in the on state will be explained. First, when it is determined in step 2180 that the foot switch is in the on state, the program execution moves to the next step 2192.
Here, it is checked whether the keyboard code KBC of the released key corresponds to one of the upper keyboard UK, lower keyboard LK, and pedal keyboard PK. If the keyboard code NKBC of the release key corresponds to the upper keyboard UK, in the next step 2195, the upper keyboard code NKBC corresponds to the upper keyboard UK.
Registration release data for R
[Re]u is read from the registration register RGNr and loaded into the A accumulator AccA. If the keyboard code KBC of the release key corresponds to the lower keyboard LK, in the next step 2194, the registration release data R[Re]l regarding the lower keyboard LK is read from the registration register RGNr, and this is set to A. Load into accumulator AccA. Further, if the keyboard code KBC of the release key corresponds to the pedal keyboard PK, in the next step 2193, the registration release data R[Re]p regarding the pedal keyboard PK is read from the registration register RGNr,
Load this into the A storage unit. When the process of loading the registration release data R [Re] of the keyboard to which the release key belongs in this way into the A accumulator is completed, the release data R [Re] is loaded in the next step 2196.
The value of [Re] is “R[Re]>0” or “R
It is determined whether [Re]<0" or "R[Re]=0". Registration release data R [Re]
If the value is "R[Re]=0", the program execution moves to step 2181, and in the subsequent steps, the same preparation process as when the foot switch is in the OFF state is performed. If the value of the registration release data R[Re] is "R[Re]>0", the program execution moves from step 2196 to step 2197, and in step 2197 the parameter calculation register PGR <sub>16</sub> is set to "(PC )=6" is replaced with "(JA)=E", and then in the next step 2198, the parameter counter is
Let the contents of PC be "(PC)=2". Next, in step 2199, the release time data ΔV[Re] of the registration release data R[Re] stored in the A accumulator AccA is transferred to the parameter calculation register.
Load into the Δ area of the unit word specified by "(PC)=2" in PRG <sub>16</sub> . After this, in the next step 2200, the content of the parameter counter PC is set to "(PC)=1", and in the next step 2201, the release time data ΔV[Re] stored in the A accumulator AccA is set to the parameter calculation register <sub>PRG16.</sub> Load into the Δ area of the unit word specified by "(PC) = 1". The processing in steps 2199 and 2201 is the same as in step 21 when the foot switch is in the OFF state.
This corresponds to the processing in step 89 and step 2191. When the process of step 2201 is completed, the program execution shifts to the parameter calculation routine shown in <sub>FIG .</sub>
Perform the calculation. This musical tone parameter G [M <sub>1</sub> ], G
The calculation of [M <sub>2</sub> ] is performed using the calculation parameter Tm [Re] stored in the T area of the unit word specified by "(PC) = 6" of the parameter calculation register PRG <sub>16</sub> in the release section calculation routine described later. It is executed based on the release time data ΔV [Re] stored in the Δ area of the unit word corresponding to the musical tone parameters G [M <sub>1</sub> ] and G [M <sub>2</sub> ],
The execution results are musical tone parameters G [M <sub>1</sub> ], G
It is sequentially stored in the VALUE area of the unit word corresponding to [M <sub>2</sub> ]. Next, if the foot switch is in the on state and the registration release data R[Re] of the keyboard to which the release key belongs is "R[Re]<0", that is, if the registration release data setting pushbutton If the piano-shaped setting pushbutton is turned on, no processing is executed in this PRG offset routine, and the program execution continues at step 2 with "(JA) = D".
From 196, the process moves to a parameter calculation routine.
As a result, the release part characteristics of the generated musical sound will be in a state similar to the state in which the key is pressed, similar to operating the sustain pedal on a piano, and after that, when the foot switch is turned off,
Preparation processing is performed in steps 2181 to 2191 in the PRG offset routine described above. The above is the preparation process for calculating the tone parameters G[M <sub>1</sub> ] to G[M <sub>2</sub> ] regarding the release section when the pressed key assigned to the 16th channel is released. Next, the release portion calculation routine of the parameter calculation routine (FIG. 20) executed immediately after the execution of the PRG offset routine will be described. (Release Portion Calculation Routine) FIG. 25 is a detailed flowchart showing the release portion calculation routine in step 2113 of the parameter calculation routine shown in FIG. In this release part calculation routine, the content (T) [CA] of the T area of the unit word specified by "(PC) = 6" in the parameter calculation register PRG <sub>16</sub> is the initial value "(T) [CA] = When the value is sequentially decremented from ``Tm[Re]'' to ``0'', step 2102 → step 2103 → step 2104 in FIG.
This is executed when the execution of the program shifts according to the path of → step 2105 → step 2106 → step 2107 → step 2113. By the way, as is clear from the explanation of the PRG offset routine above, when the foot switch is off, the parameter calculation register is
The calculation parameters related to the calculation cycle are stored in the T area of the unit word specified by "(PC) = 6" in PRG <sub>16</sub> .
Tm[Re] is loaded, but when the foot switch is on and the registration release data R[Re] shows a positive value, "(PC) = 6" in the parameter calculation register PRG <sub>16</sub> .
No calculation parameters are loaded into the T area of the unit word specified by , and its contents remain the same as they were at the stage when the calculation processing related to the sustain section was completed, which is ``(T) = 0''. .
Therefore, the path from the final step of the PRG offset routine described above to step 2103 of the parameter calculation routine in FIG. 20 is as follows:
There are different types. The first route is when the foot switch is in the on state and the release data R [Re] shows a positive value (corresponding to the data pattern (a) described above), and is the one at step 2201 ( or 219
6) → Step 2100 in Figure 20 → Step 2
The route is 101→step 2102→step 2103. The second path is when the footswitch is in the OFF state, from step 2191 in FIG. 24 to step 2100 in FIG. 20 to step 2101.
The calculation parameter Tm[Re] is decremented from step 2102 to step 2114, and then the contents of the channel counter CC complete one cycle, and the decrement processing at step 2114 results in "(PC)=6". The contents of the T area (T) [CA] of the unit word specified by is "0"
When , step 2101 → step 210
2→step 2103. First, a description will be given of the processing when the execution of the program shifts to the release section calculation routine of FIG. 25 through the latter second path. In this case, first, in step 2210, the content of the parameter counter PC is set to "(PC)=2", and in the next step ₂₂₁₁ , the unit word ( The VALUE value of the unit word corresponding to the musical tone parameter G [M ₁ ] and the content Δm [Re] of the Δ area are added, and the added value "VALUE +
Δm[Re]' is stored again as the VALUE value of the unit word. Next, in step 2212, the new VALUE value obtained in step 2211 is loaded into the unit word specified by "(PC) = 2" in the temporary parameter memory TPM ₁₆ , and is also temporarily stored in the working register WRKr ₁ . let After this, in the next step 2213, the content of the parameter counter PC is set to "(PC)=1", and in the next step ₂₂₁₄ , the unit word ( VALUE value of unit word corresponding to musical tone parameter G [M ₂ ] and contents of Δ area Δm [Re]
and the added value "VALUE + Δm [Re]"
is stored again as the VALUE value of the unit word. Next, in step 2215, the new VALUE value obtained in step 2214 is set to "(PC)=1" in the temporary parameter memory TPM ₁₆ .
At the same time, the working register WRKr ₂ is also temporarily stored. Therefore, the VALUE values of musical tone parameters G[M ₁ ] and G[M ₂ ] obtained at this stage are calculated using the following equations 51 and 52, since the calculation parameter Δm[Re] is added once. It is expressed by the formula. VALUE value of G [M ₁ ] = G [M ₁ ] st + Δm
[Re] ... (51) VALUE value of G [M ₂ ] = G [M ₂ ] st + Δm
[Re] ...(52) Note that Δm[Re] is generally a negative value. Next, in step 2216, the VALUE value of the musical tone parameter G [M ₁ ] stored in the working register WRKr ₁ and the working register
The musical tone parameters stored in WRKr ₂
Add the VALUE values and load the added value into the A accumulator AccA. Then, in the next step 2217, it is determined whether the content of the A accumulator AccA is "(AccA) = 0",
If "(AccA)=0", it is considered as a release end, and in the next step 2118 and subsequent steps, processing is performed to rewrite the transkate ranking values TRi of channel assignment tables CAT ₁ to CAT ₁₆ . Conversely, the judgment processing result in step 2217 is "(AccA)".
≠0”, processing for performing calculations regarding the release portion continues in the next step 2228 and subsequent steps. If the result of the judgment process in step 2217 is "AccA=0", the execution of the program moves to step 2228 via the terminal _RL1 , where the content of the parameter counter PC is set to "(PC)=0". And next step 22
At step 29, the calculation parameter Tm[Re] regarding the calculation cycle of the release section is read from the TCT 210 and temporarily stored in the working register _WRKr1 . After this, in step 2230, the content of the parameter counter PC is set to "(PC) = 6", and in the next step 2231, the calculation parameter Tm [Re] temporarily stored in the working register WRKr ₁ is set to the parameter calculation register.
Load into the T area of the unit word specified by "(PC)=6" in PRG ₁₆ . As a result, the second musical tone parameter G regarding the release part
This means that the calculation parameter Tm [Re] related to the calculation cycle for calculating [M ₁ ] and G [M ₂ ] has been set. When this process is completed, the program execution moves to the next step 2227, where the content of the parameter counter PC is set to "(PC) = 1", and the parameter conversion instruction flag register is set to "(PC) = 1".
Clear CFGr. The parameter conversion display flag register CFGr contains information about step 210 before the program execution moves to the release part calculation routine.
4 (FIG. 20), the parameter conversion instruction flag CFG is set to "1", but the calculation processing in the release section only calculates the calculation parameters G[M ₁ ] and G[M ₂ ] regarding the amplitude value. Therefore, there is no need to execute the parameter conversion routine processing in step 2218 (FIG. 20).
In step 2227, the contents of the parameter conversion instruction flag register CFGr are cleared. The process of the release part calculation routine is completed by the above steps, but after this, the program execution returns to the parameter conversion routine of FIG.
In step 2115, the contents of the parameter counter are decremented to "(PC)=0".
Then, the execution of the program moves to step 2117 according to the judgment instruction in step 2116, where the parameter conversion instruction flag register is set.
It is determined whether the contents of CFGr are "(CFGr)=1" or "(CFGr)=0". The parameter conversion instruction flag register CFGr is cleared in step 2227 (FIG. 25) of the release section calculation routine. Therefore, the program execution starts from step 2117 (FIG. 20) to step 2.
119, where musical tone parameters G[M ₁ ] and G[M ₂ ] related to the amplitude value are sent to the third processor section 300. As a result, the musical tone parameters G [M ₁ ], G regarding the release part of the generated musical tone of the 16th channel
The first calculation process and transfer process for [M ₂ ] are completed. Therefore, the program execution moves to the next step 2120, where the contents of the channel counter CC are decremented and "(CC)=
15'', and the process moves on to calculation processing of various parameters related to the 15th channel. In this case, the 15th
Assuming that there is no assigned key to be pressed from channel to channel 1, the program execution is from step 2120 to step 2121 to step 2101.
→ Step 2102 → Step 2120 are repeated, and Step 21 regarding the first channel is repeated.
When the process at step 2120 is completed, the content of the channel counter CC becomes "(CC)=0", and the execution of the program returns to the main routine (FIG. 17) by the judgment command at the next step 2121. After that, when the timer flag signal TFG is outputted from the timer 270, the program execution starts from step 2005 → step 2001 → step 2 in FIG.
The process returns to the parameter calculation routine via route 003. In this parameter calculation routine, the content (T) [CA] of the T area of the unit word specified by "(PC) = 6" is "(T) [CA]>
0'', the contents (T) [CA] of this T area are decremented by the decrement command in step 2114 every time the channel counter CC goes through the cycle. After that, the contents of this T area (T) [CA] are sequentially decremented by the decrement command in step 2114 to become "(T) [CA] = 0", and the contents of the channel counter CC have gone through the cycle to "( CC) = 16'', the program execution goes from step 2102 to step 2103 to step 2.
104→Step 2105→Step 2106→
The process returns to the release section calculation routine via the path from step 2107 to step 2113. Then, in steps 2211 and 2214 in the release section calculation routine of FIG. 25, the calculation parameter Δm[Re] is added again to the VALUE values of the musical tone parameters G[M ₁ ] and G[M ₂ ].
(Δm[Re] is generally a negative value), so that the musical tone parameter G[M ₁ ] at the new time,
The VALUE value of G[M ₂ ] is formed, but if the sum of the new VALUE values of the musical tone parameters G[M ₁ ] and G[M ₂ ] formed at this time is "0", The release end is determined by the judgment command in step 2217, and the program execution moves to the next step 2218. In the subsequent steps, channel assignment tables CAT ₁ to
Performs processing to rewrite the CAT ₁₆ truncation ranking value TRi. The truncate ranking values TRi of channel assignment tables CAT ₁ to CAT ₁₆ are shown in Figure 18b described above.
The priority to be truncated in the order in which the pressed keys are released by the channel allocation release flow is primarily set as a high value. Now, hypothetically, the channel assignment table CAT ₁ to _{CAT 16} before the musical tone corresponding to the pressed key assigned to the 16th channel becomes the release end.
Assuming that the contents of Table 32 are as shown below, then Table 16
Since the musical tone corresponding to the pressed key assigned to the channel is detected as the release end, the program execution moves from step 2217 to step 2218, where the content of the parameter counter PC is set to "(PC) = 6". Then, in the next step 2219, "-1" is loaded into the contents of the T area of the unit word specified by "(PC)=6" in the parameter calculation register _PRG16 . That is, the contents of the T area are made negative. As a result, the 16th channel is determined to be an empty channel in the parameter calculation routine. Also, in step 2219, the content "TRi]2" of the channel assignment table CAT ₁₆ specified by the content "(CC)=16" of the channel counter CC is loaded into the release end channel number register RECr.

【table】

[Table] When this process is completed, the next step 2220
All channel assignment tables in
The corresponding channel counter from CAT ₁ to CAT ₁₆
To detect a channel assignment table CAT with a smaller value (higher truncate rank value) than the truncate rank value TRi of channel assignment table CAT ₁₆ of the 16th channel specified by the CC content "(CC) = 16", CAT search counter
Set "16" as the initial value in RCC. Then, in the next step 2221, the content of the channel assignment table CAT ₁₆ specified by the content "(RCC)=16" of the CAT search counter RCC is read out, and it is determined whether this content is greater than "0". If "(CAT ₁₆ ) <0", the 16th channel is determined to be a busy channel, that is, the channel to which the pressed key is currently assigned and the corresponding musical tone is being produced, and the program execution proceeds to step 2225. and here
The contents of the CAT search counter RCC are decremented and the process moves on to determining the contents of the channel assignment table for the next channel. As in the example in Table 32, if the content of the channel assignment table CAT ₁₆ of the 16th channel is "(CAT ₁₆ ) ≧ 0", the program execution moves to the next step 2222, where the release end channel is The difference between the stored contents of the number register RECr and the contents of the channel assignment table CAT ₁₆ specified by the contents of the CAT search counter RCC "(RCC) = 16" is calculated, and whether the difference value is positive, negative, or "0". As in the example in Table 31, if the difference value at step 2222 is “0”, then the “(RCC)=
The 16th channel specified by "16" is determined to be the channel that has become the release end, and in the next step 2223, the truncation ranking value of the 16th channel is changed from "TRi=2" to "TRi=0".
can be rewritten as When this process is completed, the program execution moves to step 2225, where the content of the CAT search counter RCC is decremented to "(RCC)=15". Then, in the judgment processing at the next step 2226, if "(RCC)>0" is satisfied, the execution of the program returns to step 2221 by branching at step 2226, and this time, the new CAT search counter content "(RCC) ) = 15'', reads the contents of the channel assignment table CAT ₁₅ (CAT ₁₅ ), and
Determine whether this content is greater than "0". As in the example in Table 32, if the content of the channel assignment table CAT ₁₅ for the 15th channel is "(CAT ₁₅ ) = 0", the program execution moves from step 2221 to step 2222, where the release is performed. Calculates the difference between the contents of the end channel number register RECr and the contents of the channel assignment table CAT ₁₅ specified by "(RCC) = 15", and determines whether the difference value is positive, negative, or "0". to judge. In the case of this example in Table 32, “(REC)r=2”
And since "(CAT ₁₅ ) = 0", the difference value "(CAT ₁₅ ) - (REC) r" is negative, and the channel specified by the contents of the CAT search counter RCC is the release end channel number register.
This channel is determined to have a higher truncate rank value than the CAT ₁₆ truncate rank value TRi stored in RECr. In other words, the 15th channel specified by the content of the CAT search counter RCC "(RCC) = 15" is the channel counter
It is determined that the channel has a higher truncation ranking value TRi than the 16th channel specified by the CC content "(CC) = 16", and the next step 222 is performed.
In step 4, the content of the channel assignment table CAT ₁₅ specified by the content of the CAT search counter RCC "(RCC)=15" is incremented by "+1". That is, the truncate order value "TRi=0" of the channel assignment table CAT ₁₅ of the 15th channel is rewritten to a value "TRi=1" which is larger by "1". When the rewriting of the truncate rank value TRi of the sounding channel having the higher truncate rank value TRi than the truncate rank value of the sounding channel specified by the contents of the channel counter CC is completed in this way, the program execution moves to step 2225. Here, the content of the CAT search counter RCC is decremented to "(RCC) = 14", and this new content "(RCC)
Channel assignment table specified by "14"
Let's move on to determining the content of CAT ₁₄ . In the case of this example in Table 32, the truncate rank value for the 14th channel is "TRi = 1", so the truncate rank value for the 14th channel is “+1” is added and rewritten as “TRi=2”. When this process is completed, the contents of the CAT search counter RCC are decremented to "(RCC)=13" in step 2225, and the channel assignment table corresponding to the 13th channel is now
Let's move on to determining the content of CAT ₁₃ . In the case of this example in Table 32, the content of CAT ₁₃ in the 13th channel, that is, the truncate ranking value is "TRi=3". Therefore, when the difference value between the contents of the release end channel number register RECr "(RECr) = 2" and the truncation ranking value "TRi = 3" for this 13th channel is calculated in step 2222, the difference value is positive. , this 13th channel is determined to be a channel with a lower truncation rank value TRi than the 16th channel specified by the contents of the channel counter CC, and the program execution moves from step 2222 to step 2225. In other words, the truncate ranking value TRi of a sounding channel having a lower truncate ranking value TRi than the sounding channel specified by the contents of the channel counter CC is not changed in any way. The above processing is performed using the CAT search counter RCC.
is repeatedly executed until the content becomes "(RCC)=0". When "(RCC)=0", the execution of the program moves to step 2227 in response to the judgment command in step 2226, where predetermined processing is performed, and then the process returns to the parameter calculation routine of FIG. 20. Thus, step 222
The process leading to the 0 step 2226 sets the truncate rank value TRi of the channel that has become the latest release end to the highest "0", and also sets the truncate rank value TRi that is higher than the truncate rank value TRi of the channel that has become the release end. TRi
Detects a channel with , and lowers the truncation rank value TRi of this detected channel by "1", that is, adds "+1" to TRi.
This is the process of By doing this,
A new pressed key is no longer assigned to a channel that is producing a musical note in the middle of the release section, and a new pressed key is assigned to a channel that has truly reached the release end. This allows you to use pronunciation channels efficiently. Therefore, by rewriting the truncate order value TRi as described above, the above-mentioned
The truncation ranking value TRi in the example of Table 32 results in the results shown in Table 33 below.

[Table] Next, when the foot switch is on and the registration release data R [Re] is
[Re] > 0”, tone parameters G[M ₁ ], G[M ₂ ] are set in the PRG offset routine described above.
The release time data ΔV of the registration release data R [Re] is in the Δ area corresponding to
[Re] is set as the calculation parameter related to the increase/decrease value, but the calculation parameter related to the calculation cycle is
Tm[Re] is not set. Therefore, when the arithmetic processing in steps 2211 to 2215 of the release section calculation routine is executed, the VALUE values of the musical tone parameters G[M ₁ ] and G[M ₂ ] obtained by the first arithmetic processing are determined by the following equations 53 to 2215. It is expressed by the formula 54. VALUE value of G [M ₁ ] = G [M ₁ ] st + ΔV
[Re] ... (53) VALUE value of G [M ₂ ] = G [M ₂ ] st + ΔV
[Re] ...(54) And these tone parameters G[M ₁ ], G
If the sum of the VALUE values of [M ₂ ] is a VALUE value corresponding to the release end, the truncate order value TRi is rewritten from step 2218 onwards in the release part calculation routine. Processing ends. However, the musical tone parameters G[M ₁ ] and G[M ₂ ]
The sum of VALUE values corresponds to the release end
If it is not the VALUE value, the program execution moves to step 2228 (FIG. 25), and in subsequent steps 2229 to 2231, the calculation parameter Tm[Re] is set. In other words,
Load Tm[Re] as an initial value into the T area specified by "(PC) = 6". The calculation parameter Tm[Re] initialized here is then decremented each time the channel counter CC makes one round. And this “(PC)=
The contents of the T area of the unit word specified by "6" (T) [CA] is the initial value "(T) [CA] = Tm [Re]"
When the value of the channel counter CC is sequentially decremented to "0" and the contents of the channel counter CC have completed one cycle, the program execution returns to the release section calculation routine, where the tone parameter G is
[M ₁ ] and G [M ₂ ] are calculated. This calculation process is performed using the VALUE of musical tone parameters G [M ₁ ] and G [M ₂ ].
It is executed repeatedly until the sum of the values reaches the VALUE value corresponding to the relean end. Therefore, in this case, the VALUE values of musical tone parameters G[M ₁ ] and G[M ₂ ] up to the release end are expressed by the following formula 55 ~
It is expressed by the formula 56, and the VALUE value of G[M ₁ ]=G[M ₁ ]st+n×ΔV
[Re] ... (55) VALUE value of G [M ₂ ] = G [M ₂ ] st + n x ΔV
[Re] ... (56) (where n: an integer representing the number of calculations) It is a time function that changes by a value indicated by ΔV [Re] at each period determined by the calculation parameter Tm [Re]. As a result, the release part characteristics of the generated musical tone are determined by the parameters Tm[Re] and ΔV[Re]
The release part characteristics of the electronic organ type are determined by The new key to be pressed is assigned to the channel,
The attack part, decay part, and
This is an explanation of various programs that calculate the musical tone parameters G[CA] to G[M ₂ ] _leading to the sustain section and the release section. The processing to be performed when a message regarding an on event or an off event of the foot switch is transferred from the first processor section 100 during the operation will be described. (Release control routine) Musical tone parameters of all channels G [CA] ~ G
During the calculation of [M ₂ ], when a foot switch on-event message or off-event message is transferred from the first processor section 100, the release control routine of step 2006 in the main routine of FIG. 17 is executed. Ru. FIG. 26 is a diagram showing a detailed flowchart of the release control routine. When the program execution moves from step 2001 of the main routine to this release control routine, first, in step 2240, it is determined whether the transfer message regarding the foot switch is an on-event message. , or is an off-event message. If the transfer message regarding the footswitch is an on-event message, the program moves to step 2241, where the footswitch flag FFG of "1" is set in the footswitch flag register FFGr. Thereafter, the process moves to a parameter calculation routine, and if there is a release key at this point, release control regarding this release key is performed in response to the ON state of the foot switch. On the other hand, if the message regarding the foot switch is an off-event message, the program execution moves to step 2242, and in subsequent steps the key assignment has already been canceled.
And the parameter calculation register PRG "(PC) =
A process of detecting a channel in which the contents of the JA area of the unit word specified in "6" are not "(JA) = E" and replacing the contents of the JA area of this channel with "(JA) = E". At the same time, the same processing as when the foot switch is in the OFF state in the PRG offset routine described above is performed. That is, in step 2242, the channel counter CC is loaded with "16" as an initial value, and then in the next step 2243, the content of the parameter counter PC is set to "(PC)=6". Then, in the next step 2244, the contents of the channel assignment table CAT specified by the contents of the channel counter CC are read, and it is determined whether the contents are "(CAT)<0" or "(CAT)≧0". . If “(CAT) Clement and “(CC) =
15". Conversely, if "(CAT)≧0", the channel is judged to be a blank channel, and in the next step 2245, the parameter calculation register corresponding to the blank channel is specified by "(PC)=6". Read the contents of the JA area of the unit word to be
E” or “(JA)≠E”.
If "(JA)=E", the program execution moves to step 2257, where the contents of the channel counter CC are decremented. However, if "(JA)≠E", even though the channel has already been deallocated regarding the release key, the "(PC)=
Since the content "E" for instructing the operation related to the release part is not set in the JA area of the unit word specified by "6", the content of the JA area is changed to "(JA )=E”. Next, step 2
In step 247, the content of the parameter counter PC is set to "(PC)=0", and in the next step 2248, the calculation parameter Tm[Re] regarding the calculation cycle of the release portion is read from the TCT 210, and is temporarily stored in the working register _WRKr1 . This calculation parameter Tm [Re] is based on the tone number data TCN, the content of the parameter counter PC "(PC) = 0", and the subparameter counter SPC.
is read out from the TCT 210 with the content "(SPC)=2". Then, in the next step 2249, the indirect calculation parameter Δ·ADRm[Re] regarding the increase/decrease value of the release portion is read out and temporarily stored in the working register _WRKr2 .
This indirect calculation parameter Δ・ADRm
[Re] is determined by the tone number data TCN, the contents of the parameter counter PC “(PC) = 0” and the contents of the sub-parameter counter SPC “(SPC) = 4”.
Read from TCT210. When the above processing is completed, the next step 225
0, the content of the parameter counter PC is set to "(PC) = 6", and after this, the next step 22
In step 51, the calculation parameter Tm [Re] temporarily stored in the working register WRKr ₁ is loaded into the T area of the unit word of the parameter calculation register PRG ₁₆ corresponding to the musical tone parameter G [CA]. Next, in step 2252, Δ table address information for reading out the calculation parameter Δm[Re] regarding the release portion from the Δ table 230 is created. This Δ table address information is
Indirect calculation parameter Δ・ADRm [Re] stored in working register WRKr ₂
and the key code KC stored in the key code table KCT ₁₆ . After this, the Δ table 230 is addressed with the Δ table address information "Δ・ADRm+KC" created in this way, and the calculation parameter Δm[Re] read out is stored in the working register.
Store it temporarily in WRKr ₃ . Next, in step 2253, the content of the parameter counter PC is set to "(PC)=2", and in the next step 2254, the content of the working register is set to "(PC)=2".
Calculation parameter Δm stored in WRKr ₃
[Re] is loaded into the Δ area of the unit word corresponding to the tone parameter G[M ₁ ] of the parameter calculation register PRG ₁₆ . After this, the next step 225
In step 5, the content of the parameter counter PC is set to "(PC) = 1", and in the next step 2256, the calculation parameter Δm[Re] stored in the working register WRKr ₃ is set as the musical tone parameter G in the parameter calculation register PRG ₁₆ .
Load into the Δ area of the unit word corresponding to [M ₂ ]. When this process is completed, program execution moves to the next step 2257, where the contents of the channel counter CC are decremented, and the decremented channel counter is
If the content of CC is "(CC) = 0", step 2
By branching at step 258, the process returns to step 2244, and the same processing as described above is performed again. Then, when the content of the channel counter CC becomes "(CC)=0", the program execution shifts to a parameter calculation routine. As is clear from the above explanation, step 22 of this release control routine
The processes 42 to 2258 correspond to the post-processing ``when the foot switch is in the OFF state or the registration release data R[Re] is negative'' in the aforementioned PRG offset routine (FIG. 24). (Parameter Conversion Routine) Next, the parameter conversion routine of step 2118 in the parameter calculation routine of FIG. 20 will be described. FIG. 27 is a diagram showing a detailed flowchart of the parameter conversion routine.
Executed when the content of CFGr is "(CFGr) = 1",
Musical tone parameters G [CA], G [CT], G [Pi], R obtained by the above parameter calculation routine
Based on [Pi], frequency parameters R <sub>1</sub> and R <sub>2</sub> are obtained by logarithmic operation. The calculation process of frequency parameters R <sub>1</sub> and R <sub>2</sub> is as follows:
This is carried out based on the above-mentioned equations 1' to 2' and equations 3 to 4. The process will be explained below along with a flowchart. First, in step 2270, the K register is
Set Kr to “0”. This indicates that R <sub>1</sub> among the frequency parameters R <sub>1</sub> to <sub>R 2</sub> should be calculated first. Then, in the next step 2271, the tone parameter G calculated by the parameter calculation routine is
Logarithm table 250 with [CA] as address information
(Fig. 1), thereby reading out the logarithmic tone parameter logαCA corresponding to the tone parameter G [CA] from the logarithm table 250, and
Temporarily stored in the logCA register LCAr (Table 23). Similarly, in the next step 2272, the tone parameter G calculated by the parameter calculation routine is
Logarithm table 250 with [CT] as address information
As a result, the logarithmic tone parameter logαCT corresponding to the tone parameter G[CT] is read out from the logarithm table 250 and temporarily stored in the logCT register LCTr (Table 23). When this process is completed, the next step 2273
The operation expressed by the following equation 57 is performed in , and the execution result is temporarily stored in the y register yr (Table 23). y=(logαCA−logαCT)+21−NC+G <sub>2</sub>
[Pi] + R[Pi] ... (57) In equation 57, NC is multiplied by 21 because the space between each note is divided into 21. As a result, a logarithmically expressed frequency parameter y corresponding to the timbre number data TCN, registration pitch data, initial touch data, modulation data, and pressed key pitch is obtained. By the way, the value of the frequency parameter y calculated in step 2273 may be ``y<0'' or ``y≧252'' depending on how the values of the various data are given. frequency parameter y
If the value of is "y <0" or "y ≥ 252", it is impossible to read the frequency parameter y expressed as a natural number from the RNT 260 because the address of the RNT 260 is only in the range from 0 to 251. Become. Therefore, the value of the frequency parameter y is "y<0"
Or if “y≧252”, set it to “0”
Processing for correcting so that y≦251 is satisfied is executed in steps 2274 to 2282. That is, in step 2274, the J register Jr (Table 23) in which the correction value J is stored is cleared, and in the next step 2275, the y register Jr is cleared.
It is determined whether the content of is “y<0” or “y≧0”. If the content of the y register yr is “y≧0”, program execution moves to the next step 2276,
Here, the content of the y register yr is “y≦
250” or “y>251”. As a result of this judgment process, “y≦251” and “y≧
0'', that is, 0≦y≦251, the program execution proceeds to step 228.
3, where the contents of the y register yr are supplied to the RNT 260 (FIG. 1) as address information, and thereby the frequency parameter R' expressed as a natural number is read from the RNT 260. If the content of the y register yr is "y<0", program execution moves to step 2277, where "252" is added to the content of the y register yr, and
This is set as the content of the new y register yr. Adding "252" to the contents of the y register yr means shifting the contents of the y register yr by a range corresponding to one octave. in this case,
Since the content of the y register yr is "y<0", this means that the pitch has been shifted by one octave toward the treble range. Therefore, in order to remember that this process has been performed, in the next step 2278, J
Decrement the contents of register Jr by "1". Then, in the next step 2279, the contents of the y register are shifted by one octave.
Determine whether the content of yr is "y≧0" or "y<0". As a result of this judgment process, y register yr
If it is found that the content of is "y≧0", the program execution moves to the next step 2283,
Here, the contents of the y register yr, whose contents have been shifted by one octave, are supplied to the RNT 260 as address information, and thereby the RNT
Frequency parameter expressed as a natural number from 260
Read R′. After this, the next step 2284
, the frequency parameter R' read out from the RNT260 is corrected by one octave based on the content "(Jr) = -1" of the J register Jr, and the frequency parameter R' read out from the RNT260 is corrected by one octave based on the registration foot data R [Fe]. Make corrections. This correction process is expressed by Equation 58 below, and is expressed as "OC+J
This is realized by shifting the bit position of the frequency parameter R' toward the most significant bit by an amount corresponding to the value of "+R[Fe]"R=R'×20C+J+R[Fe] (58). On the other hand, as a result of the judgment process in step 2279, if it is found that the content of the y register yr is "y<0", the program execution returns to step 2.
277, where the contents of the y register yr are further shifted by one octave. This correction process is performed so that the contents of the y register yr are “0≦y≦
This process is repeated until the number reaches 251. Further, the correction process when the contents of the y register yr is "y>251" is performed in the same way. In other words, if it is found through the judgment process in step 2276 that the contents of the y register yr are "y>251", the program execution proceeds to step 2280.
Then, "252" is subtracted from the contents of the y register yr to shift it to the lower range by one octave. Then, in the next step 2281, the contents of the J register Jr are incremented by "+1". Next, in step 2282, the contents of register yr are checked again, and if "y≦251", the next instruction in step 2283 is executed, and "y>
251”, step 2282 to step 2
Returning to step 280, the content of the y register yr is corrected again. The frequency parameter R ₁ calculated by the above calculation process is calculated in step 2285.
The data is transferred to the third processor section 300 via FIFO2. After this, program execution moves to step 2286, where the K register
Determine whether the content of Kr is "(Kr) = 1".
If the content of K register Kr is "(Kr)≠1", the process moves to the next step 2288, where the content of K register Kr is set to "(Kr)=1", and then in the next step 2289, "G[ CA〕=1024−G
[CA]" and "G[CT]=1024-G[CT]", and based on these newly calculated musical tone parameters G[CA] and G[CT], step 2 is performed.
Frequency parameter R ₂ at 271-2284
Performs the calculation process. And the frequency parameter
When the transfer processing of _R2 is completed, the program execution moves from step 2286 to step 2287 because the content of the K register Kr is "(Kr) = 1", where the tone parameters G[CA] and G [LA] is transferred to the third processor section 300. When this transfer process is completed, the program executes the parameter calculation routine (Figure 20).
The process moves to step 2119, where musical tone parameters G[M ₁ ] and G
[M ₂ ] is transferred to the third processor section 300. The frequency parameters R ₁ and R ₂ transferred to the third processor unit 300 are two-word data R _1H (integer part), R _1L and R _2H (integer part), R _2L each consisting of an integer part and a decimal part. Each is sent as . And these frequency parameters R _1
H , R _1L and R _2H , R _2L and musical tone parameters G [CA], G [LA], G [M ₁ ], G [M ₂ ] are as follows:
As shown in Table 34 below, identification codes corresponding to each parameter are attached, and the channel number of the pronunciation channel corresponding to the discrimination code is attached as the leading data and transferred. This also applies to the case where only musical tone parameters G[M ₁ ] and G[M ₂ ] relating to amplitude values are transferred.

[Table] Incidentally, since all processing in the second processor section is regulated by the set cycle of the timer 270, the data transferred to the third processor section 300 is assumed to be transferred at the set cycle of the timer 270. Become. Therefore, there is an advantage that the amplitude envelope of the generated musical tone can be easily controlled. The above is a detailed explanation of the detailed configuration of the second processor section 200 and the programs that perform various processes. Next, the detailed configuration and operation of the third processor section 300 will be explained. Third processor section 300 (Configuration explanation) Figure 30 shows the FIFO from the second processor section 200.
Musical tone parameters G transferred via 2
[CA], G[LA], G[M ₁ ], G[M ₂ ] and frequency parameters R ₁ (R _1H , R _1L ), R ₂ (R _2H , R _2
FIG . 3 is a block diagram showing the overall configuration of an embodiment of a third processor section 300 that generates a corresponding musical tone signal based on a musical tone signal. This third processor section 300 also has a microprocessor type circuit configuration, and musical tone signals Gv ₁ to Gv ₁₆ of each channel are formed in a time-sharing manner based on the various parameters described above. In other words, as shown in the time chart in Figure 3, out of the musical tone signal conversion time DAC・T called DAC time, which consists of a total of 20 time slots, there are 16 time slots corresponding to 16 sound generation channels. Musical tone signals Gv ₁ to _{Gv 16} of each channel are formed in the generation region GEN・R, and one of them is temporarily stored in FIFO 2 in the frequency region FCH・R, which consists of four time slots. Four of the above-mentioned various parameters of the channel are imported. In this case, Generation Region GEN・R
Each time slot in the fetch region FCH.R is specified by the contents of a channel counter CC provided in the CLU 301, which will be described later. And the Generation Legion
In each time slot of GEN・R, the sample point amplitude value corresponding to the first phase of the waveform memory is calculated in the first half, and the sample point amplitude value corresponding to the second phase of the waveform memory is calculated in the second half. Calculated. The musical tone signals Gv ₁ to _{Gv 16} of each channel, which are formed by repeating such processing, are then accumulated in an accumulator and converted into analog signals using the fetch signal FCH ₅ generated at the period of the musical tone signal conversion time DAC·T. is converted into a musical tone signal. Note that the first waveform memory
The calculation time of the sample point amplitude value corresponding to the phase and the second phase is determined by the clock pulse φcc. In FIG. 30, a third processor 300 includes a control logic unit (hereinafter referred to as CLU) 301 that performs control to execute various arithmetic processing according to a predetermined program stored in advance in a program memory PGM, and a FIFO 2. Various parameters for each channel transferred from G [CA]
A parameter memory 302 in which R ₂ is written for each channel under the control of the CLU 301 (therefore, it has a memory area corresponding to 16 channels x 8 parameters) and various parameters for each channel read from the parameter memory 302. Parameter register 303 that stores and holds the frequency parameters R ₁ and R ₂ (q= ₁ , ₂ , 3...) and the cumulative values qR ₁ and qR Calculation of address information A (A ₁ , A ₂ ) for the waveform memory using ₂ and musical tone parameter G [LA] related to phase difference, and comparison of musical tone parameter G [CA] with the accumulated values qR ₁ , qR ₂ An arithmetic logic unit (hereinafter referred to as ALU) 304 that performs processing, and an ALU 30
A working memory 305 that temporarily stores the cumulative values qR ₁ and qR ₂ calculated in step 4 and address information A for each channel, and an output that temporarily stores the address information A read from the working memory 305 under the control of the CLU 301. register 306
, a phase register (PH/REG) 307 that captures and temporarily stores address information A output from the output register 306, and a parameter register 3.
Among the various parameters output from 03, the musical tone parameters G[M ₁ ] and G[M ₂ ] related to the amplitude value are set to 1.
A magnitude register (MG/REG) 308 stores parameters in units of parameters, and a sample point amplitude value of a desired musical sound waveform is logarithmized and stored at each address.Address information A is output from a phase register 307. the sample point amplitude value output from the waveform memory 309 and the musical tone parameter G [M ₁ ] or G [M ₂ ] output from the magnitude register 308. an adder 310 that adds
an accumulator 312 that accumulates the sample point amplitude values of each channel output from the accumulator 311 in the period of the clock pulse φcc; and an output that latches and stores the accumulated value of the sample point amplitude values of each channel output from the accumulator 312. register 3
13, and a DA converter (hereinafter referred to as DAC) 314 that converts the output of the output register 313 into a corresponding analog musical tone signal G.
The output of 314 is produced by the sound system 400 as a musical tone. In this case, address information A (A ₁ , A ₂ ) for the waveform memory 309 is calculated in a time-sharing manner based on the above-mentioned equations 5 to 6. Therefore, if the sample point amplitude value of the musical sound waveform stored in the waveform memory 309 corresponds to a pure sine waveform, the instantaneous value of the musical sound signal of one channel obtained from the output of the LLC 311
Gvi(t) is expressed by the above-mentioned equations 9 and 10. Note that the sample point amplitude width value logSinA ₁ (or logSinA ₂ ) output from the waveform memory 309 and the musical tone parameter G [M ₁ ] (or G [M ₂ ]) are added to the adder 3.
What is added at 10 is the musical tone parameter G
[M ₁ ] and G[M ₂ ] are expressed logarithmically (expressed as digital values) as described above, and the amplitude setting for each sample point amplitude value is performed by performing addition processing. Furthermore, the processing timing in the fetch region FCH-R is determined by the clock pulse _φ1 output from the clock oscillator 3010.
The processing timing in the generation region is determined by the clock pulse φcc (1/2 period of _φ1 ) output from the clock oscillator 3010. The above is a brief explanation of the overall configuration of the third processor section 300, and the meanings of the various signals shown in FIG. 30 are as shown in Table 35 below.

【table】

【table】

[Table] Figure 31 is a block diagram showing the detailed internal configuration of the CLU301.
a channel counter CC that outputs channel data CH specifying each time slot in the
A condition selector CNS performs sequence control of the program counter PGC, and a parameter memory 302 performs various arithmetic operations.
A program memory PGM that outputs control signals and control data to the ALU 304, working memory 305, etc., and a program counter that outputs address information to the program memory PGM.
The PGC and the address information ADR/I for the parameter memory 302 are transferred to the FCH region.
It consists of an address selector ADRS for switching between R and generation regions. Various control data and control signals are stored in each address of the program memory PGM in a word structure as shown in Table 36 below.

[Table] These control signals and control data control the channel counter CC, condition selector CNS, program counter PGC, address selector ADRS, and program memory PGM. In this case, the program counter PGC is sequentially incremented at the cycle of clock pulse _φ1 , but the condition inputs (ALL, NEV, FLG,
OPT, RQ, BOR) matches the branch condition specified by the branch condition code BCC, the branch address information B/ADR output from the program memory PGM becomes the branch address output from the condition selector CNS. It is loaded by the load signal B/LD, and as a result, the program is loaded at the branch address B/ADR.
Jump to the address indicated by . Of the condition inputs input to the condition selector CNS, ALL is a branch command that says "always jump to the address specified by branch address information B/ADR," and NEV is a branch command that says "jump to the address specified by branch address information B/ADR." Execute the program as specified in
BOR is a borrow signal when the content of channel counter CC changes from "1" to "0". (Operation explanation) Third processor section 30 configured as above
The operation of 0 will be explained based on the flowchart shown in FIG. First, in step 3020, the waveform memory 3
Musical tone signal G _vr6 for channels 09 to 16
In order to create address information A16 for reading the sample point amplitude value of , "16" is loaded into the channel counter CC as an initial value. As a result, the content of channel counter CC is "(CC) = 16"
Then, in the next step 3021, the current integer part address information AH of the 16th channel is
and musical tone parameter G [CA] are compared, and “AH
<G[CA]'', in the next step 3022 new integer part address information A _H is calculated based on the frequency parameters R _1L and R _1H . Moreover, if "AH>G[CA]", in the next step 3023, the frequency parameters R _2L and R
New integer part address information A _H is calculated based on _2H . In this case, the integer part address information A _H is the cumulative value of the integer parts R _1H and R _2H of the frequency parameters R ₁ and R ₂ .
It corresponds to qR _1H and qR _2H , and is the cumulative value qR _1L of the decimal parts R _1L and R _2L of the frequency parameters R ₁ and R ₂ .
If there is a signal from the decimal part address information A _L corresponding to qR _2L , it is added to this integer part address information A _H. In this embodiment, only the integer part address information A _H is supplied to the waveform memory 309 as the address information A. The carry signal of the decimal part address information A _L is displayed as □C in steps 3022 and 3023. In this way, new integer part address information A _H
Once calculated, the next steps 3024-302
Through the processing in step 5, the instantaneous amplitude value Gv ₁₆ (t) of the musical sound waveform Gv ₁₆ related to the 16th channel designated by the content "(CC)=16" of the channel counter CC is formed. That is, in step 3024, the integer part address information A _H is sent to the PH/REG 307 to be stored and held, and the tone parameter G
[M ₁ ] is sent to M _G and REG 308 to be stored and held. As a result, the sample point amplitude value of the first phase corresponding to the address information A _H is obtained from the waveform memory 309.
logPv ₁ (=logSinA _H ) is read out, and this first phase sample point amplitude value logPv ₁ and musical tone parameter G
[M ₁ ] are added in the adder 310 to obtain the first
Amplitude setting is performed for the phase sample point amplitude value _logPv1 . The output of the adder 310 logPv ₁ ′ (=logPv ₁・G
[CA]) is a natural number signal in LLC311
After being converted to Pv ₁ , it is supplied to the accumulator 312. Next, in step 3025, the integer part address information A _H and musical tone parameter G [LA] are added,
The added value “A _H + G [LA]” is PH・REG307
At the same time, the musical tone parameter G [M ₂ ] is sent to the MG/REG 308 to be stored and held. As a result, the second phase _sample point amplitude value logPv ₂ (=logSin(A _H +
G[LA]) is read out, and the second phase sample point amplitude value logPv ₂ and musical tone parameter G[M ₂ ] are added in an adder 310 to obtain the amplitude for the second phase sample point amplitude value logPv ₂ Settings are made. The output of the adder 310 logPv ₂ ′ (=logPv ₂・G
[M ₂ ]) is a natural number signal Pv ₂ in LLC311
is converted to The sample point amplitude value Pv ₂ of the second phase output from the LLC 311 is supplied to the accumulator 312.
12, it is added to the sample point amplitude value Pv ₁ of the first phase, thereby forming the instantaneous amplitude value Gv ₁₆ (t) of the musical sound waveform Gv ₁₆ for the 16th channel. In this case, step 3024 forms the first phase sample point amplitude value _Pv1 , and step 302
5 is the process of forming the second phase sample point amplitude value Pv ₂ in the first half and second half of the time slot specified by "(CC) = 16" of the energy generation region GEN・R. It is done in parts. When the process of forming the instantaneous amplitude value Gv ₁₆ (t) of the musical sound waveform Gv ₁₆ for the 16th channel is completed in this way, the program execution proceeds to the next step 30.
26, where the channel counter
Decrement the contents of CC to make "(CC) = 15". As a result of the decrement processing in step 3026, a borrow signal is generated from the channel counter CC.
If BOR is not output, the execution of the program is branched by the judgment command "BOR?" at the next step 3027 and returns to step 3021, where the musical tone signal Gvi related to the channel specified by the new contents of the channel counter CC is output. Perform processing to form. Then, at the stage when the process of forming the musical tone signal Gv ₁ of the first channel is completed, step 3026 is performed.
As a result of executing the decrement process, when a borrow signal is output from the channel counter CC, the execution of the program branches according to the judgment instruction at step 3027 and proceeds to step 3028. Then, in this step 3028, the content of the channel counter CC is set to "(CC) = 4", and after this, in the next step 3029, it is checked whether the output request signal OPT/RQ output from FIFO2 is "1". to decide. If the output request signal OPT/RQ of "1" is output from FIFO 2, the program execution moves to step 3030, where the shift out signal SFTo is output to FIFO 2, and various parameters are output from FIFO 2. One of them is read into the parameter memory 302. vice versa,
Output request signal OPT/RQ is “0”
If so, program execution moves to step 3031 where a "non-operation" instruction is executed. This "non-operation" instruction is literally an instruction for which no effective processing is performed. This "non-operation" command in step 3031 is executed by the energy region GEN/R and the fetish region FCH/R, regardless of whether the output request signal OPT/RQ is "1" or "0". This is to ensure that each time slot in R has the same time width. When the processing in step 3030 or step 3031 is completed, the decrement instruction "(CC)←(CC)-1" in step 3032 is executed to set the content of the channel counter CC to "(CC)=3". After this, in the next step 3033, it is determined whether or not the borrow signal BOR is output from the channel counter CC. If the borrow signal
If BOR is not output, the program execution returns to step 3029 and performs processing to read the second parameter. On the contrary, the boro signal
If BOR is output, fetish region
FCH.R has ended, and the program execution returns to step 3021 to perform processing in the generation region GEN.R again. By performing the above processing, the accumulator 312 has a maximum of 16 types of musical sound waveform instantaneous amplitude values Gv ₁₆ (t) to Gv ₁ (t) per 1 DAC time.
is supplied, and here its composite value

[Formula] is obtained. Then, this synthetic vibration width value

[Formula] is supplied to the DAC 314 via the output register 313, and in this DAC 314, the corresponding analog musical sound waveform instantaneous amplitude value Gv
(t) and supplied to the sound system 400. By repeating such processing, up to 16 types of musical tones can be produced simultaneously from the sound system 400. In this case, the musical tone signal Gv supplied to the sound system 400 is the time-varying musical tone parameter G calculated in the second processor section 200.
[CA] to G[M ₂ ], and is also formed based on the waveform memory 309 in the third processor section 300.
Since the address signal A corresponding to the address signal A is switched over time, its waveform shape changes complicatedly over time. In addition, the second processor section 20
Musical tone parameter G [CA] calculated at 0
Since initial touch data and after touch data have already been added to ~G [M ₂ ],
The waveform of the musical tone signal Gv changes depending on the performance state. As a result, the tone of the musical tones produced by the sound system 400 changes over time, and also changes depending on the performance state. As explained above, the electronic musical tones according to this embodiment include detection of pressed keys, channel assignment of pressed keys and corresponding tone generation assignment, truncation control of generated musical tones, calculation of various musical tone parameters, and address information for waveform memory. All processing, including calculations, is performed using a general-purpose microprocessor. Therefore, it is extremely easy to change the processing contents such as the various detection processing, assignment processing, parameter calculation processing, etc., and it is possible to freely form desired musical tone signals and produce complex, varied, and rich musical tones. . Furthermore, musical tones can be created with a small-scale configuration that takes into consideration a wide variety of complex parameters. Furthermore, the relationship between the first processor section 100, the second processor section 200, and the third processor section 300 is as follows.
combined by an asynchronous buffer memory FIFO,
Transfer data is attached with a unique identification code JC before being transferred. For this reason, these first processor 100 to third processor section 300
Each process in the processor can be made asynchronous with each other, and only the processing speed of the entire system needs to be set in a predetermined relationship, which has the advantage that the processing contents within each processor can be determined and changed separately. be. In addition, since the truncation control of the generated musical tone is performed at two points: when the pressed key is released and when the musical tone related to the released key reaches the release end, the generated musical tone that does not reach the release end is This eliminates the problem of being forcibly erased mid-way or making it impossible to allocate a sound, and it is possible to eliminate the sense of incongruity between the pressed key state and the generated musical sound. Furthermore, since the tone generation assignments for the musical tones corresponding to the pressed keys are varied depending on the number of tone generation sequences set on the keyboard section, the types of musical tones that are generated simultaneously with the number of pressed keys can be made different. Furthermore, the musical tone parameters G[CA] to G[M ₂ ] calculated in the second processor section 200 include:
Since the initial touch data and aftertouch data corresponding to the key depression state are taken into account, the tone of the generated musical tone corresponds to the tone setting information and changes in response to the initial touch signal and aftertouch signal. In this case, the initial touch data and after touch data are obtained by mixing analog initial touch signals and after touch signals, sampling this mixed output at different timings, and extracting these touch signals separately from one output terminal. These two touch signals are then decomposed with different weights depending on the type of tone parameter, and then converted into digital initial touch data and aftertouch data and extracted. Therefore, the touch sense circuit for obtaining initial touch data and after touch data can be simplified and economicalization can be achieved. In addition, the calculation parameters for calculating the musical tone parameters G [CA] to G [M ₂ ] are changed not only by the tone setting information but also by the range of the pressed key, so even if the pressed keys of the same note are The tones differ slightly due to the different ranges. In addition, in the process of calculating the musical tone parameters G[CA] to G[M ₂ ] in the second processor section 200, the program flow changes as the number of pressed keys changes, and the musical tone parameters G[CA] to G [ _M2 ]
In order to prevent the calculation processing time from becoming random, a timer is used to regulate the calculation processing so that it is performed at fixed time intervals. Therefore, envelope control of the generated musical tones can be precisely performed at regular time intervals. Further, the frequency parameters R ₁ and R ₂ calculated in the second processor section 200 are calculated by logarithmic operation, and a logarithm table used for the logarithm operation stores a special base logarithm value. There is. Therefore, the calculation time for the frequency parameters R ₁ and R ₂ is shortened, and there is an advantage that a general-purpose memory element can be used efficiently as the memory element for storing the logarithm table. (Application example of the embodiment shown in FIG. 1) The electronic musical instrument shown in the embodiment shown in FIG. 200, and predetermined musical tone parameters G[CA] to G[ _M2 ] are calculated in the second processor section 200.As an example of this application, an electronic musical instrument as shown in FIG. configuration is possible. That is, in FIG. 34, in addition to the output port Po 1 for data from the _{first processor section 100 to the second processor section 200, an output port Po 2 and} an input port Pi ₁ are provided, and when data is transferred to the second processor section 200, the same Data output port
Transfer to external device via Po ₂ . in this case,
The input port Pi ₁ is configured to input an interrupt request signal INT so that an interrupt request can be made to the first processor section 100 from an external device, and when an interrupt request occurs, the first processor section 10
0 receives data (DB) from input port Pi ₁ , and processes the data as if it were performance information input in real time from the touch sensor circuit of the key switch circuit or the registration switch circuit. . Or input port
Transfer the data from Pi ₁ as is to output port Po ₁ without any processing. On the other hand, on the external device side, input/output ports Pi 1 ′, Po ₂ ′ are provided corresponding to the input/output ports Pi ₁ , Po ₂ of _the first processor section 100, and a buffer memory RAM for temporary storage of various data is provided.・A～
RAM・C and memory FM for data storage
Set it up. Furthermore, the first processor section 100
Data transfer and buffer memory RAM・A~
a microprocessor CPU for controlling data transfer to RAM/C and memory FM;
Program memory that stores control programs
Command setting panel for instructing the data transfer format between the PGM and the first processor unit 100
CMD/P and a timer TM that generates time information for storing the occurrence time or elapsed time of various events together with event-related data.
Let's set this. Then, make it possible to specify the following modes on the command setting panel CMD/P. (a) Normal mode A mode in which no data is exchanged between the external device and the first processor section 100. (b) Get mode The external device side takes in only the transfer data from the first processor section 100 and stores it in the buffer memory.
Mode that only stores data in RAM・A~RAM・C or memory FM. (c) Replay mode This is a mode in which processing is the opposite of the get mode, in which the first processor unit 100 captures only transfer data from the external device side. (d) Sink mode A mode in which data is exchanged between the external device and the first processor section 100. By making such a mode selectable, the following can be achieved. That is, in the gate mode described above, the data transferred from the first processor section 100 can be stored in the memory FM together with the time signal of the timer TM. For example, performance information by a famous performer can be stored as digital data and this can be stored in the memory FM. It can then be played back. In this case, since the performance information includes initial touch data and aftertouch data, when this is subsequently played back, an effect can be obtained as if the performance was being performed by a famous performer. In addition, in the aforementioned replay mode, the memory FM
The performance information stored in the replay mode can be read, and the performance information can be transferred to the first processor section 100 according to the time information stored together with the performance information.Using this replay mode, the performance information can be read as if it were a concert performance. can produce musical tones that sound like a musical instrument being played. In this case, by increasing the frequency of the reference clock pulse of the timer TM, the tempo of the reproduced musical tone can be increased. Further, in the sync mode, for example, while playing the performance information stored in the buffer memory RAM-A, performance information performed synchronously by the performer can be simultaneously stored in the buffer memory RAM-B. In this case, if a mixing circuit for the performance information transferred from the first processor section 100 and the performance information output from the output port Po ₂ is provided inside the external device, a synthesis circuit that combines both performance information can be created. It is also possible to record liquid performance information. As described above, according to the application example shown in FIG. 34, the same player can be sounded not only based on key press information from the keyboard section but also based on information from other external devices. D. Effects of the Invention As explained above, according to the present invention, musical tone parameters are formed once every N times in accordance with an appropriately set frequency in response to an instruction of calculation timing at each predetermined time interval by the timer means. Since the calculations are repeated, it becomes possible to arbitrarily and easily control the temporal change of the musical tone parameters to be formed with high precision on the time axis with a simple configuration by setting the frequency. Further, according to the present invention, the parameter formation calculations for a plurality of musical tone parameters are performed in a time-sharing manner using one calculation means, and the frequency is set for each musical tone parameter. With a simple configuration using the calculation means of
A plurality of musical tone parameters whose change speeds (change timings) are independently controlled can be created simultaneously.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of an electronic musical instrument to which the present invention is applied, FIG. 2 is a diagram for explaining the principle of musical tone signal formation of the electronic musical instrument shown in FIG. 1, and FIGS. 3 a and b. 4 is a detailed circuit diagram showing an embodiment of the key switch circuit in the electronic musical instrument shown in FIG.
The figure is a detailed circuit diagram showing one embodiment of the touch sensor circuit in the electronic musical instrument shown in Figure 1.
6 is a detailed circuit diagram showing an example of the effect modulation oscillator, EXP pedal switch circuit, and modulation circuit in the electronic musical instrument shown in FIG. 1. 7 is a diagram showing an example of the registration panel in the electronic musical instrument shown in FIG. 1, FIGS. 8a and 8b are flow charts showing an example of the main routine program in the first processor section,
10 is a flowchart showing an example of a play event search routine program in the first processor section. FIGS. 10a and 10b are flowcharts showing an example of a manual event search routine program in the first processor section. FIG. FIG. 12 is a flowchart showing an example of a key-off routine program in the first processor section; FIGS. 13 a to c are examples of a pedal event search routine program in the first processor section. FIG. 14 is a flowchart showing an example of a modulation data get routine program in the first processor section, and FIG. 15 is a flowchart showing an example of a modulation data get routine program in the first processor section. A diagram showing an example, No. 16 is the first
17 is a flowchart showing an example of the main routine program in the second processor section, and FIGS. 18a and b are channels in the second processor section. A flowchart showing an example of an assignment routine program, FIG.
FIG. 20 is a flowchart showing an example of the PRG onset routine in the processor section. FIG. 20 is a flowchart showing an example of the parameter calculation routine program in the second processor section. FIG. 21 is a flowchart showing an example of the initial routine program in the second processor section. FIG. 22 is a flowchart showing an example of the n.Δ set routine program in the second processor section.
FIG. 3 is a flowchart showing an example of an attack part calculation routine program, a decay part calculation routine program, and a sustain part calculation routine program in the second processor part, and FIG. 24 shows an example of a PRG offset routine program in the second processor part. Flowchart: FIG. 25 is a flowchart showing an example of the release section calculation routine program in the second processor section; FIG. 26 is a flowchart showing an example of the release control routine program in the second processor section; FIG. 27 is a flowchart showing an example of the release control routine program in the second processor section. A flowchart showing an example of a parameter conversion routine program in the processor section, FIG. 28 is a diagram for explaining the principle of calculation of musical tone parameters in the second processor section, and FIG. 30 is a detailed block diagram showing an embodiment of the third processor section, and FIG. 31 is a control logic unit (CLU) shown in FIG. 30.
32 is a flowchart showing an example of a processing program in the third processor section, FIG. 33 is a time chart for explaining the operation of the third processor section, and FIG. 34 is a flowchart showing an example of the processing program in the third processor section.
FIG. 2 is a block diagram showing an example of application of the electronic musical instrument shown in the figure. 1, 2...FIFO, 100...first processor section, 101...first arithmetic unit, 110...key switch circuit, 120...touch sensor circuit, 13
0...Effect modulation oscillator, 140...EXP pedal switch circuit, 150...Modulation circuit, 170...
...Registration switch circuit, 180...
Wattswitch circuit, 201... second arithmetic unit,
210... Tone control information table, 220... Note scaling table, 230... Δ table, 240... n table, 250... logarithmic table, 260... R table, 300... third
Processor section, 301... Control logic unit, 302... Parameter memory, 304
...Arithmetic logic unit, 305
... Working memory, 307 ... Phase register, 308 ... Magnitude register, 30
9... Waveform memory, 311... Logarithm/natural number converter, 312... Accumulator, DAC...D.
A converter, 400...sound system.

Claims (1)

[Scope of Claims] 1. In a musical tone parameter forming device for an electronic musical instrument that is used for generating musical tone signals and forms musical tone parameters that change sequentially over time, a parameter formation device for forming new parameter values of the musical tone parameters. parameter formation calculation means for performing calculations using predetermined values corresponding to the musical tone parameters; timer means for instructing the timing of the parameter formation calculations at predetermined time intervals set in advance for the calculation means; and means for setting the frequency of execution of the parameter formation operation in the calculation means, wherein the calculation means sets the parameter at a rate according to the frequency with respect to the instruction of calculation timing at each predetermined time interval by the timer means. A musical tone parameter forming device for an electronic musical instrument, characterized in that a musical tone parameter forming device for an electronic musical instrument is configured to execute a forming operation to form musical tone parameters that sequentially change according to the predetermined value, the predetermined time interval, and the frequency. 2. In a musical tone parameter forming device for an electronic musical instrument that is used for generating musical tone signals and forms a plurality of musical tone parameters that change sequentially over time, a parameter forming operation is performed to form new parameter values for each of the musical tone parameters. ,
parameter formation calculation means that can be executed on a time-sharing basis for each musical tone parameter using a predetermined value corresponding to the musical tone parameter; and timing of the parameter formation calculation at predetermined time intervals set in advance for the calculation means. timer means for commonly instructing each of the musical tone parameters, and means for independently determining the frequency of execution of the parameter forming operation in the calculation means for each of the musical tone parameters, the calculation means , in response to the instruction of the calculation timing at each predetermined time interval by the timer means, the parameter forming calculation for each of the musical tone parameters is executed at a rate according to the frequency, and for each of the musical tone parameters. A musical tone parameter forming device for an electronic musical instrument, characterized in that a parameter value is formed that sequentially changes according to the predetermined value, the predetermined time interval, and the frequency, respectively.