JP3117482B2 - Electronic musical instrument assigner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument, and more particularly, to an electronic musical instrument assigner for selecting a tone generation channel to which new tone information is assigned when a new tone is generated by a so-called level assign method.

[0002]

2. Description of the Related Art Generally, an electronic musical instrument has a plurality of tone generating channels. When a tone is generated based on a new key depression or the like, a tone generating channel to which a new tone is to be assigned is selected from the plurality of tone generating channels. Has been selected. For example, there is the following method for this selection. • Select a vacant tone generation channel that has finished sounding.・ Select the tone generation channel that started sounding (key pressed) earliest. -Select the tone generation channel corresponding to the key released the earliest.・ Select a tone generation channel with the least amount of sound (envelope level, etc.). This is a so-called level assignment method. -For example, a key release order-a key press order and the like are selected in combination.

[0003] By the way, musical tones produced by electronic musical instruments include musical tones of an attenuated tone such as a piano and musical tones of a continuous tone such as a flute. Since the transition of the envelope during key depression is different between the attenuated sound system and the sustained sound system, the above-described method of selecting the tone generation channel is appropriate or inappropriate depending on the type of the tone.

[0004] For example, in the case of a musical tone of an attenuated sound system, the envelope waveform after a key is pressed is generally fixed.
As a selection method, a selection method based on a so-called level assignment for selecting a tone generation channel having the smallest sound generation amount is suitable. On the other hand, a selection method such as a key pressing order for selecting a tone generation channel which has been depressed earliest is based on a tone generation channel which has been depressed first but generates a useful tone with a large volume of sound, and then a depressed key. However, it is selected earlier than the tone generation channel that generates the tone with a small sound volume,
For this reason, useful musical tones are stopped from being produced, and the natural feeling in the performance expression may be impaired.

[0005] In addition, since the tone volume of a sustained tone system is maintained at a certain value during a key depression or a pedal on as a so-called sustain period, a method of selecting a key release order or a key depression order is used. Therefore, the selection method by the level assignment is not suitable.

[0006]

As described above, in the case of an electronic musical instrument assigner using the level assignment method, the tone generation amount of each tone generation channel is compared, and generally, the tone generation channel having a small tone generation amount is compared with the tone generation channel. Is selected, the sound generation is stopped, and new tone information is assigned.

On the other hand, even if the tone of the tone generating channel has a small sound volume, the tone is gradually attenuated if the player intentionally continues to press the key or depress the pedal. Will be prolonged or prolonged. In general, it can be considered that such a musical tone is considered to be a useful musical tone in performance expression even if the sound volume is small.

However, when the level assignment method is used, even a musical tone considered to be useful,
Since the tone generation amount is small, there is a possibility that the tone is selected and stopped before the tone of another tone generation channel is assigned in allocating new tone information. In other words, in the conventional level assignment method, the state of the key press or the pedal state of each tone generating channel is not sufficiently considered when selecting the tone generating channel, which may impair the natural feeling in the performance expression.

There is a so-called multi-timbral electronic musical instrument which simultaneously handles attenuated and sustained musical tones. In this multi-timbral electronic musical instrument, the decay tone and the continuous tone are played simultaneously.
The tone generation channels to be selected include attenuated sounds and sustained sounds. However, there is no conventional method for selecting a tone generation channel that is commonly suitable for both the damped sound system and the sustained sound system. Is not taken into account, and there is a possibility that the natural feeling in the performance expression may be impaired, such as the stoppage of the production of useful tones that should be continued to be produced due to the nature of the musical tones. For this reason, in the multi-timbral electronic musical instrument, it is necessary to select a tone generation channel by a separate selection method separately for an attenuated sound system and a sustained sound system, and the selection process becomes very complicated.

The present invention has been made in view of the above problems, and an object thereof is to provide an electronic musical instrument assigner using a so-called level assign method.
An object of the present invention is to make it possible to select a tone generation channel to which new tone information is to be assigned while also reflecting a key pressed state and a pedal state, thereby reducing a sense of incongruity in performance expression.

Another object of the present invention is to allow a so-called level assignment system selection method to be adopted for a multi-timbral electronic musical instrument as a common selection method for the decay sound system and the sustained sound system. An object of the present invention is to reduce a sense of incongruity in performance expression caused by an inappropriate selection of a tone generation channel based on a difference in pronunciation between a system and a continuous sound system.

[0012]

In order to achieve the above-mentioned object, an electronic musical instrument assigner according to the present invention, as a first form, detects a tone generation amount of each tone generation channel or a value corresponding thereto. First detecting means, a second detecting means for detecting a note status of each musical tone generating channel, and an evaluation level of each musical tone generating channel based on the sound generation amount detected by the first detecting means or a value corresponding thereto. For a tone generation channel whose note status detected by the second detection means is note-on, so that it is difficult to select the tone generation channel in calculating the evaluation level of the tone generation channel. Weighting and correcting the weighting so as to decrease with the lapse of time of the note-on state; It is obtained by a selecting means for performing selection of the musical tone-generating channel to assign a new music information on the basis of the evaluation level of the musical tone-generating channel.

[0013]

Further, as a second embodiment, the assigner of the electronic musical instrument according to the present invention is applied to a multi-timbral electronic musical instrument that handles both the decay tone musical tone and the sustain tone musical tone together. It is configured to be used commonly for continuous tone musical tones.

[0015]

The operation of the assigner of the electronic musical instrument according to the present invention will be described below with reference to FIG. 22, which shows an example of the sound generation amount and the evaluation level of the decay sound system and the continuous sound system. In the figure, [A] is an attenuated sound system, [B] is a sustained sound system, and the waveform indicated by a broken line is the amount of tone generation of the tone generation channel being generated (for example, the amplitude level of the generated tone, the tone generation channel of the tone generation channel). Envelope level or pseudo envelope level), and the solid-line waveform is the evaluation level.

In the assigner of the electronic musical instrument according to the present invention, during normal operation, the first detecting means detects the tone volume of each musical tone generating channel or a value corresponding thereto (for example, a pseudo envelope level). Alternatively, the evaluation means calculates the evaluation level based on the value corresponding thereto. For example, the magnitude of the pronunciation amount is directly used as the evaluation level. Based on the evaluation level, the selecting means sequentially selects, for example, the tone generation channels having the lowest evaluation level, and sets the selected tone generation channel as a tone generation channel to which new tone information is assigned.

In the assigner of the electronic musical instrument according to the first embodiment, as shown in a section β in FIG. 22, for the musical tone generation channel whose note status detected by the second detecting means is note-on, the arithmetic processing means In calculating the evaluation level of the musical tone generating channel, weighting is performed so that the musical sound generating channel is hardly selected, for example, the evaluation level is calculated based on the sound generation amount or a value corresponding thereto being weighted in a predetermined manner. In addition, the weighting is reduced with the lapse of time of note-on continuation, so that the tone generation channel is gradually selected.

In this way, even in the so-called level assignment method, when selecting a musical tone generation channel, the state of note-on such as key depression is reflected, and useful musical tones are smaller than other musical tones even if the sound volume is small. Can be prevented from being selected first. In addition, if the weighting is reduced over time, it is generally considered that a tone that is depressed earlier is released earlier than a tone that is depressed afterwards. By lowering, the key pressing order is also reflected in the selection of the level assignment method, so that a more appropriate tone generation channel can be selected, and the unnatural feeling in the performance expression can be reduced.

[0019]

When the assigner of the first embodiment described above is applied to a multi-timbral electronic musical instrument, a tone generation channel is selected by a level assignment method for a tone of a sustained tone in particular. Since the key state is also reflected, it is not an inappropriate selection method,
Therefore, since the present invention can be used for both attenuated tones and sustained tones, the selection process in such a multi-timbral electronic musical instrument can be simplified, and the feeling of incongruity in performance expression can be reduced. Can be.

The interval α in FIG. 22 extends over a predetermined period (generally, during an attack considered to be important for expressing the characteristics of a musical tone, or during an attack and a decay) from the start of the tone generation channel. Although the evaluation level is set to a large value, it is possible to prevent a tone generation channel, which is producing an important part in tone expression, from being stopped and assigned to a new key press. Of course, in implementing the present invention, such a section may not be provided.

[0040]

FIG. 1 shows an electronic musical instrument to which an assigner according to one embodiment of the present invention is applied. The electronic musical instrument of this embodiment is a multi-timbral electronic musical instrument having a plurality of independent timbre parts. In this multi-timbral electronic musical instrument, performance information for the parts is transmitted to a MIDI channel corresponding to each part. It is designed to be used and supplied. In FIG. 1, reference numeral 20 denotes a MIDI circuit for receiving a MIDI signal. This MIDI circuit receives a MIDI message from an external automatic performance device (not shown) via a MIDI bus (not shown) and decodes the MIDI message into performance information and the like.
Each time the reception of the DI message is completed, a corresponding interrupt is issued to the CPU 22 via the bus 21. For example, when a note-on and / or note-off message is received, a key data reception interrupt is generated. The ROM 23 has a CPU 2
2, data and tables required for each process are stored in advance together with the program to be executed. R
A working area including various registers required for executing a program is set in the AM 24. The timer 25 interrupts the CPU 22 at predetermined time intervals (1 mSec). The CPU 22 executes a predetermined program, receives performance information and the like in response to an interrupt from the MIDI circuit 20, and writes the information into a corresponding register of the RAM 24. Further, a tone generation circuit 26 having 16 tone generation channels is controlled by executing a predetermined program based on the written data and the like. The tone generator 26 generates a desired tone signal and sends it to a speaker 28 via an amplifier 27 to generate a tone. The tone generation channel generates a tone signal based on a tone generation instruction from the CPU 22 and tone generation parameters given at that time, and shifts the generated tone signal in accordance with the passage of time. The tone generation channel is C
The smoothing envelope is generated by interpolating the envelope level based on the target value indicating the next envelope level provided by the PU 22 and the rate indicating the amount of change of the envelope level per predetermined time, and the amplitude of the tone signal is controlled. At the same time, according to the instruction of the rapid decay, the envelope level is attenuated in accordance with a predetermined rapid decay rate. Next, various maps set in a predetermined area of the RAM 24 will be described with reference to FIGS. 2 to 7 show some of these maps.

MIDI Channel Map (FIG. 2) The following items are stored by “0 to 15” in correspondence with MIDI channel numbers indicating the types of 16 MIDI channels. (1) Part number: The type of 16 parts is "0-15"
I will show it.

Part maps (FIG. 3) The following are stored in accordance with the part numbers indicating the types of the 16 parts using "0 to 15". (1) Tone number: Indicates the tone. (2) Truncate prohibition phase number: Indicates the last number of the phase for which the assignment of a new musical tone is prohibited.
Sec)) Prohibit new tone assignment. In this embodiment, it is the phase number until the end of the attack. (3) Reserve number: Indicates the number of tone generation channels for which the assignment of a new tone is prohibited. (4) Sustained sound flag: A sustained tone is indicated by "1" and a damped sound is indicated by "0". (5) Damper flag: Set the damper on to “1”
Damper off is indicated by "0".

The note map (FIG. 4) is provided for each of the 16 part numbers indicated by "0 to 15" .
The following are stored in correspondence with the note number indicating the pitch of the musical tone by 27 ". (1) Note status: With note-on being" 1 ",
Note-off is indicated by “0”. (2) Sostenuto status: Shows sostenuto on with “1” and sostenuto off with “0”.

The task management map (FIG. 6) The following items are stored in correspondence with the task numbers indicating the types of tasks according to "1 to 7". The task number is
“1” is a key data receiving task, “2” is a main assigner task, “3” is a sounding task, “4” is a pre-assigner task, “5” is an envelope task, “6” is a pedal data receiving task, 7 "is an operator data reception task, and the lower the number, the higher the priority. (1) Timer processing request flag: Indicates that timer processing is required with “1”. (2) Status: “0” indicates that the task is in the run state, and “1” indicates that the task is ready.
The weight is indicated by “2”. (3) Waiting event value: Indicates the type of waiting event whose status is wait. (4) Event occurrence flag: The occurrence of an event is indicated by “1” for each event of the task.

Tone generation channel management map (FIG. 7) The following numbers are stored in correspondence with the tone generation channel numbers indicating the 16 tone generation channels by numbers "0 to 15". (1) Sound volume: The sound volume of the currently sounding musical tone is “0000”.
H ”to“ FFFFH ”(2) Truncate prohibition flag: Indicates the prohibition of allocation of new musical sounds with“ 1 ”(3) Rapid decay flag: The previous musical sound is being rapidly decayed Is indicated by “1.” (4) Processing wait flag 1: Indicates the waiting of the first processing in the sound generation task by “1” (5) Processing wait flag 2: Waits for the second processing in the sound generation task (6) Processing wait flag 3: Indicates the processing wait of the third processing in the sound generation task with “1.” (7) Note number: Indicates the pitch of a musical tone (8) Velocity : Indicates the velocity of the musical tone (9) Musical tone generation parameter group: Indicates the value of various parameters related to musical tone generation (10) Key pressing order: Note-on receiving order is indicated by “0 to 15”, and the oldest note-on The reception order is indicated by “0”. (11) Note status (12) Part number

Envelope management map (FIG. 5) The followings are stored in correspondence with the envelope channel numbers indicating the 16 envelope channels by numbers "0 to 15" corresponding to each tone generation channel. (1) Envelope level: Set the envelope level to “00”.
00H ”to“ FFFFH ”(2) Target value: The next envelope level to be reached is“ 0 ”.
000H ”to“ FFFFH ”(3) Rate: Indicates the amount of change in the envelope level per a predetermined time (5 mSec). (4) Phase number: Indicates the current phase number (elapsed stage from the start of musical tone generation) (5) Truncate prohibited phase number: Last phase number for which allocation of new musical sounds is prohibited (6) Envelope generation parameter group: Indicates the values of various parameters related to the envelope generation of musical sounds (7) Correction amount: Indicates the correction amount that reflects the sound generation state, etc.

The operation of the electronic musical instrument configured as described above
First, a brief description will be given. In the electronic musical instrument of this embodiment,
Are various tasks, that is, key data reception task,
Assigner task, pronunciation task, pre-assigner task,
Envelope task, pedal data reception task, operator
Each task of the data reception task manages a monitor program
Below, multitasking with priority processing between tasks
It is executed. Here, the monitor program
Set routine, event wait monitor call routine,
Event occurrence monitor call routine, timer interrupt processing
Routine, key data reception interrupt processing routine, pedal
Data reception interrupt processing routine, operator data reception interrupt
There is only a processing routine. Key data reception task (Fig. 1
3) is the tone information (note-on and
And / or note-off message)
Note-on processing is performed when a message
Launch the assigner. Main Assigner Task (Figure 1
4) is a tone generation channel set in the pre-assigner task.
Select sound generation channel according to channel assignment order
Then, a pronunciation request is made to the pronunciation task. Pronunciation task
(Figs. 15 and 16) are selected by the main assigner task.
If it is sounding for the selected tone generation channel
Performs processing to stop the sound, and stops the sound
If stopped or stopped, the input
To generate the musical information
Calculates various necessary parameters, etc., and calculates the calculated parameters.
Transfer parameters, etc. to the tone generation channel and start sounding
Instruct. The pre-assigner task (Fig. 17) is a timer
Is activated periodically by the
Read the tone volume of each tone generation channel from the
The pre-assigner pronunciation volume, and in principle this pre-assigner
Pre-assignment order setting routine based on sound volume (Fig. 1
Set the pre-assignment order of the tone generation channels according to 8).
And set the assignment order. In addition, reserve
Only the tone generation channel is selected. Tone generator
The sound volume of the flannel management map depends on the envelope task.
It is sequentially updated. Envelope task (Fig. 19, Fig. 2
In 0), whether or not the tone generation channel has finished sounding
And, for those whose pronunciation has ended,
Set to “0”. For those whose pronunciation has not ended
Check whether the musical sound is a decay sound or a sustained sound.
Update of the sound volume of the damping sound system corresponding to that (Fig. 21)
To the continuous sound system,
The pronunciation amount is updated (FIG. 22). In addition, the sound volume
Make the following settings to enable note-on and pedal-on
This makes it difficult to select a tone generation channel. Note
If a rapid decay is required when receiving ON, "FFFF
H ”. Attack level / 2 during attack
+ Set to "8000H". Only end the attack
If one note-on state is selected, the envelope level /
Set to 2 + correction amount. Here, the correction amount is
When the note-on initial correction amount is set and the attack ends
While the note-on state continues, the note-on decreases at predetermined intervals.
Decrease by the amount until the note-on minimum correction amount is reached.
You. Note-off state and pedal state is on
Set to envelope level / 2 + correction amount
You. The amount of correction depends on the type of pedal that is on.
Set based on the pedal-on initial correction amount. No
To the off state and all pedal states are off
Is set to envelope level / 2. Next, FIGS.
Various variables used in the flowchart of 2
There are the following. NSTK request source task number: Indicates the task number of the task that made the monitor call. NSET request source event value: Indicates the type of event to be processed next in the task that made the monitor call. NDTK request destination task number: Execute next Indicates the task number of the task scheduled to be executed. NDET Request destination event value: Indicates the type of event to be processed in the task scheduled to be executed next. IEDF Initialization completion flag: Indicates completion of initialization in all tasks TCTN Timer interrupt processing target number: Indicates the task number of the timer interrupt processing target. TCNE [N] Nth task timer counter value: Indicates the value of the timer counter for the task whose task number is N. TCND [N] Nth task time interval: Indicates the time interval at which a timer event is issued for the task whose task number is N. TCNE [TCTN] TCTN task Ima counter value: Indicates the value of the timer counter for tasks whose task number is timer interrupt processing target number TCTN. TCND [TCTN] TCTN task time interval: Timer for tasks whose task number is timer interrupt processing target number TCTN Indicates the time interval for issuing the event.

[Key Data Receiving Task] NTNM Note Number: Indicates the pitch of performance information based on the note-on and / or note-off message. NTST Note Status: "1" indicates that the performance information is based on the note-on message. Thus, the performance information based on the note-off message is indicated by "0". NTVL velocity: Indicates the velocity of the performance information based on the note-on message. MCNM MIDI channel number: based on the note-on and / or note-off message Indicates the MIDI channel number of performance information. PTNM part number

[Main Assigner Task] MASS [N] The tone generation channel number of the Nth assignment order:
Indicates the tone generation channel number of the tone generation channel whose assignment order is the Nth assignment order (the Nth assignment order). TASN Target assignment order: Indicates the assignment order number of the assignment target. MAEF Main assigner processing flag: Main assigner Indicates that new assignment processing has been performed by the task with “1”. MASS [TASN] Tone generation channel number of assignment order TASN: The tone generation channel number of the tone generation channel whose assignment order is the target assignment order TASN. GACN Number of assignable tone generation channels: Indicates the number of assignable tone generation channels.

[Sound Generation Task] GCTN Sound generation processing target tone generation channel number: Indicates the tone generation channel number to be processed. TDNF rapid decay incomplete flag: Indicates that any tone generation channel is undergoing rapid decay with “1”.

[Preassigner task] GN Music generation channel number PPTN Preassigner part number PLEV [GN] Preassigner sound volume of music generation channel number GN PACT [GN] Preassigner rapid decay flag PTRN [PPTN] of music generation channel number GN Preassigner part number PPTN reserve number PTRC [PPTN] Preassigner part number PPTN reserve processing number PAIT [GN] Preassigner truncation prohibition flag for musical sound generation channel number GN PAST [GN] Preassigner note status for musical sound generation channel number GN PAPN [GN] Key assignment order of pre-assigner of tone generation channel number GN PRCN Pre-assigner Reserve over total number of tone generation channels: Indicates the total number of tone generation channels not to be reserved. N pre-assigned order PASS [N] N-th pre-assigned order tone generation channel number:
Indicates the tone generation channel number of the tone generation channel whose pre-assignment rank is the Nth rank. PN processing target key press rank

[Envelope task] ECTN envelope processing target number EPNM envelope processing target part number ELEN envelope level ENNM envelope processing target note number ECLV correction amount EVOL sound volume

[0063]

First, FIG. 8 to FIG.
This will be described with reference to the flowchart shown in FIG. Re
Set Routine (FIG. 8) This is a routine that is executed when a reset is applied when the power is turned on or the like. Each step Z
The processing in A1 to ZA3 is as follows. [ZA1] The statuses of all task numbers in the task management map are set to “1: ready”, and the timer processing request flag, the wait event value, and the event occurrence flag are set to “0”. Further, initialization such as setting an initialization completion flag IEDF to “0: initialization not completed” is performed. [ZA2] The request source task number NSTK is updated to “1: key data reception task”, and the status of the task number “1: key data reception task” in the task management map is set to “0: run”. [ZA3] Execute the key data reception task.

Event Waiting Monitor Call Routine (FIG. 9) This routine is executed when the task being executed makes an event waiting monitor call. The processing in each of steps ZB1 to ZB5 is as follows. [ZB1] Regarding the task number corresponding to the request source task number NSTK in the task management map, one of the event generation flags corresponding to the bit “1” in the binary representation of the request source event value NSET is set to “1: event occurrence” Is determined. If any of the corresponding event occurrence flags is "1: event occurrence", the process returns to the task that made the event wait monitor call. In determining the event occurrence flag, for example, if the request source event value NSET is "1", a first event occurrence flag is set, if the request source event value NSET is "2", a second event occurrence flag is set. Requester event value NS
When ET is "3", the first and second event occurrence flags are determined. [ZB2] In the determination in step ZB1, if none of the event occurrence flags to be determined is “1” and does not indicate that an event has occurred, the task number corresponding to the request source task number NSTK in the task management map is determined. The status is set to "2: wait" and the wait event value is set to the request source event value NSET. Also, in preparation for the resumption of the process, an interrupting process such as saving the contents of the registers and the like used in the requesting task to the stack area (hereinafter simply referred to as a requesting task interrupting process) is performed. [ZB3] The task management map is examined, and a task having a lower priority than the task that has made the event wait monitor call and having a corresponding status of "1: ready" is searched in order of task number. If there is no task that indicates this ready, the request source task number NSTK is set to “8” indicating sleep, and the process goes to sleep. It should be noted that, from sleep, the timer 25
Alternatively, based on a hardware interrupt from the MIDI circuit 20, a timer interrupt processing routine, a key data reception interrupt processing routine, a pedal data reception interrupt processing routine, or an operator data reception interrupt processing routine to be described later is started. [ZB4] When the highest priority ready task is found in step ZB3, the request source task number NSTK is updated to the task number of the task, and the status of the task number of the task in the task management map is set to "0: run". I do. [ZB5] Execute the task corresponding to the request source task number NSTK. When the task is executed, resumption processing (hereinafter, simply referred to as resumption processing) such as returning data and the like saved in the stack area to the original register or the like in the interruption processing of the task is performed.

Event Occurrence Monitor Call Routine (FIG. 10) This routine is executed when an executing task makes an event occurrence monitor call. The processing in each of steps ZC1 to ZC7 is as follows. [ZC1] For the task number corresponding to the requested task number NDTK in the task management map, the event occurrence flag corresponding to the bit of "1" in the binary representation of the requested event value NDET is set to "1". For example, if the requested event value NDET is "1", the first event occurrence flag is set to "1". If the requested event value NDET is "2", the second event occurrence flag is set to "1".
Set to. [ZC2] It is determined whether the status of the task number corresponding to the request destination task number NDTK in the task management map is "2: wait", and whether the waiting event value corresponds to the request destination event value NDET. If the status is not “2: wait” or the wait event value does not correspond to the request destination event value NDET, the process returns to the task that made this monitor call. Whether the wait event value corresponds to the request destination event value NDET is determined by the request destination event value corresponding to the bit “1” in the binary representation of the wait event value.
The determination is made based on whether any one of the bits in the binary representation of NDET is “1”. For example, when the wait event value is "1", the first bit of the request destination event value NDET is "1", and when the wait event value is "2", the second bit of the request destination event value NDET is "1". If the wait event value is "1" and the first or second bit of the request destination event value NDET is "1", it is determined that this corresponds. [ZC3] In the determination in step ZC2, if the status to be determined is “2: wait” and the wait event value corresponds to the request destination event value NDET, this status is set to “1: ready”. [ZC4] Requested task number NDTK is the requesting task number
It is determined whether or not the priority of the request destination task is higher than the priority of the request source task based on whether or not it is less than NSTK. If the requested task number NDTK is not less than the requested task number NSTK and the priority of the requested task is not high, the process returns to the task that made this monitor call. [ZC5] In the determination in step ZC4, if the requested task number NDTK is less than the requested task number NSTK and the priority of the requested task is high, the status of the task number corresponding to the requested task number NSTK in the task management map Is set to "1: ready", and the requesting task is suspended in preparation for the resumption of the processing. [ZC6] Request source task number NSTK is requested task number
While updating to NDTK, the status of the task number corresponding to the requested task number NDTK in the task management map is set to “0: run”. [ZC7] The task of the task number corresponding to the requested task number NDTK is executed. When the task is executed, the task is restarted.

Timer Interrupt Processing Routine (FIG. 11) In this timer interrupt processing routine, the timer 25
When a timer interrupt occurs, the timer counter corresponding to each task is checked first, and if the value exceeds “1”, the timer counter is decremented by “1”.
If it does not exceed “1”, the first event occurrence flag of the task number in the task management map is set to “1: event occurrence”, and if the status of the task is “2: wait”, the status is changed to “1”. Set to “1: Ready”. Next, it is determined whether tasks should be executed in order from a task having a higher priority, and a task that satisfies a condition is executed first. Each step ZD
The processing in 1 to ZD16 is as follows. [ZD1] It is determined whether or not the initial setting completion flag IEDF is "1: initial setting completed". If the initial setting completion flag IEDF is not “1”, the initial setting of all tasks has not been completed yet, so the timer interrupt processing is terminated and the processing returns to the processing before the timer interrupt. Since the initial setting of each task described below has been completed, the process proceeds to the next step ZD2. [ZD2] The timer interrupt processing target number TCTN indicating the task number of the timer interrupt processing target is set to “7”. [ZD3] It is determined whether or not the timer processing request flag of the task number corresponding to the timer interrupt processing target number TCTN in the task management map is "1: Requested". If the timer processing request flag is not "1", the process proceeds to step ZD8. [ZD4] In the determination in step ZD3, if the timer processing request flag to be determined is “1: request”, the TCTN task timer counter value TCNE [TCTN]
Is greater than or equal to “1”. If the TCTN task timer counter value TCNE [TCTN] exceeds "1", the flow proceeds to step ZD10.

[ZD5] If it is determined in step ZD4 that the TCTN task timer counter value TCNE [TCTN] does not exceed “1”, first the TCTN task timer counter value TCNE [TCTN] is added to the TCTN task time. Interval TCND [T
CTN] is added, and this value is set as a new TCTN task timer counter value TCNE [TCTN]. Next, the first event occurrence flag of the task number corresponding to the timer interrupt processing target number TCTN in the task management map is set to “1: event occurrence”.
Set to. [ZD6] The status of the task number corresponding to the timer interrupt processing target number TCTN in the task management map is “2: wait”, and the first bit in the binary representation of the wait event value of the task is “1” (for example, wait event It is determined whether the value is “1”, “3”).
If the status is not “2: wait” or the first bit in the binary representation of the wait event value is not “1”, the process proceeds to step ZD8. [ZD7] In the determination in step ZD6, if the status to be determined is “2: wait” and the first bit in the binary representation of the wait event value to be determined is “1”, the timer in the task management map The status of the task number corresponding to the interrupt processing target number TCTN is set to “1: ready”. [ZD8] It is determined whether or not the timer interrupt processing target number TCTN exceeds "1". If the timer interrupt processing target number TCTN does not exceed "1", all the event occurrence flag setting processes have been completed.
Proceed to D11. [ZD9] If it is determined in step ZD8 that the timer interrupt processing target number TCTN exceeds “1”, the timer interrupt processing target number TCTN is decremented by “1” and the process returns to step ZD3. [ZD10] In the determination in step ZD4,
If the TCTN task timer counter value TCNE [TCTN] exceeds “1”, the TCTN task timer counter value TCNE
[TCTN] is decremented by "1", and the flow advances to step ZD8.

[ZD11] Timer interrupt processing target number
In this routine, the TCTN determines whether or not the request source task number NSTK indicating the processing before the occurrence of the timer interrupt is less than NSTK. If the timer interrupt processing target number TCTN is not less than the request source task number NSTK, the priority of the task executed at the time of occurrence of the timer interrupt is not lower than the priority of the task corresponding to the processing target number TCTN. Ends processing and returns to the task. [ZD12] In the determination in step ZD11, the timer interrupt processing target number TCTN is the request source task number.
If it is less than NSTK, it is determined whether or not the status of the task number corresponding to the timer interrupt processing target number TCTN in the task management map is “1: ready”. If this status is not "1", then step ZD1
Proceed to 6. [ZD13] In the determination in step ZD12, if the status of the determination target is “1: ready”, the request source task number NSTK in the task management map
, The status of the task number corresponding to the task number NSTK is set to “1: ready”, and the task corresponding to the request source task number NSTK is suspended in preparation for the resumption of the process. [ZD14] The request source task number NSTK is updated to the timer interrupt processing target number TCTN, and the status of the task number corresponding to the timer interrupt processing target number TCTN in the task management map is set to “0: run”. [ZD15] A timer event is generated. That is,
Executes the task with the task number corresponding to the timer interrupt processing target number TCTN. When the task is executed, the task is restarted. [ZD16] If it is determined in step ZD12 that the status to be determined is not “1: ready”, the timer interrupt processing target number TCTN is incremented by “1” and the process returns to step ZD11.

Key Data Reception Interrupt Processing Routine (FIG. 12) This routine is executed when an interrupt is received from the MIDI circuit 20, and generates a key data reception event. The processing in each of the steps ZE1 to ZE6 is as follows. [ZE1] It is determined whether or not the initialization completion flag IEDF is "1: completed". If the initial setting completion flag IEDF is not "1", the initial setting of all tasks has not been completed yet, so that the key data reception interrupt processing ends and the processing returns to the processing before the key data reception interrupt occurred. [ZE2] If it is determined in step ZE1 that the initial setting completion flag IEDF is "1: completed", the first event occurrence flag of the task number "1: key data receiving task" in the task management map is set to "1: generated". Set to "". [ZE3] It is determined whether the status of the task number "1: key data reception task" in the task management map is "2: wait" and the wait event value is "1: key data reception event wait". If this status is not “2: wait” or the wait event value is not “1: key data reception event wait”,
The key data reception interrupt processing ends, and the processing returns to the processing before the occurrence of the key data reception interrupt. [ZE4] In the determination in step ZE3, if the status of the determination target is “2”, the wait event value is “1”, and the key data reception event is waiting,
In this routine, it is determined whether or not the request source task number NSTK indicating the processing before the occurrence of the key data reception interrupt is less than "8". If the requesting task number NSTK is less than “8”, the status of the task number corresponding to the requesting task number NSTK in the task management map is set to “1: ready”, and a timer interrupt is prepared in order to resume the processing. Suspend the task before occurrence. Note that "8"
If not, no special processing is required. [ZE5] The request source task number NSTK is changed to the task number "1:
In addition to updating to "key data receiving task", the status of task number "1: key data receiving task" in the task management map is set to "0: run" [ZE6] A key data receiving event is generated, that is, a key is generated. The data receiving task is executed, and the key data receiving task is restarted when the task is executed.

The pedal data reception interrupt processing routine is executed when a pedal data reception interrupt is applied from the MIDI circuit 20, and a pedal data reception event is generated. [ZF1] It is determined whether or not the initialization completion flag IEDF is "1: completed". If the initial setting completion flag IEDF is not "1", the initial setting of all tasks has not been completed yet, so that the pedal data reception interrupt processing routine is ended and the processing returns to the processing before the occurrence of the pedal data reception interrupt. [ZF2] If the initial setting completion flag IEDF is "1: completed" in the determination in step ZF1, the first event occurrence flag of the task number "6: pedal data reception task" in the task management map is set to "1: generated". "
Set to. [ZF3] The status of the task number “6: Pedal data reception task” in the task management map is “2:
It is determined whether or not the wait event value is “1: wait for pedal data reception event.” The status is not “2: wait,” or the wait event value is “1: wait for pedal data reception event.” If not, the pedal data reception interrupt process ends and the process returns to the process before the pedal data reception interrupt. [ZF4] In the determination in step ZF3, the status of the task number "6: Pedal data reception task" in the task management map is "ZF4". If the wait event value is “1” and the wait event value is “1”, this status is set to “1: ready.” [ZF5] Depending on whether the request source task number NSTK exceeds “6” or not. It is determined whether the priority of the requesting task is lower than the priority of the pedal data receiving task. If TK does not exceed “6” and the priority of the request source task is not lower than the priority of the pedal data reception task, the request source task number NSTK indicating the task executed before the pedal data reception interrupt [ZF6] If the request source task number NSTK exceeds “6” and the priority of the request source task is lower than the priority of the pedal data reception interrupt task in the determination in step ZF5, It is determined whether or not the request source task number NSTK indicating the processing before the occurrence of the key data reception interrupt is less than “8”.
If NSTK is less than “8”, the status of the task number corresponding to the requesting task number NSTK in the task management map is set to “1: ready”, and the requesting task is suspended in preparation for resuming the processing. Perform processing. In addition,
If it is not less than "8", no special processing is required. [ZF7] The request source task number NSTK is updated to "6: pedal data reception task", and the status of the task number "6: pedal data reception task" in the task management map is set to "0: run". [ZF8] A pedal data reception event is generated. That is, the pedal data receiving task is executed. When the task is executed, the pedal data receiving task is restarted. If the task returns to the task that was being executed before the interruption of the pedal data reception in the determination in step ZF5, the condition is satisfied in the event wait monitor call routine based on the event wait monitor call in any task. Execute

Operator data reception interrupt processing routine This is executed when an operator data reception interrupt is received from the MIDI circuit 20, and an operation data reception request event is generated by processing according to the pedal data reception interrupt processing routine. [ZG1] It is determined whether or not the initialization completion flag IEDF is "1: completed". If the initial setting completion flag IEDF is not "1", the initial setting of all the tasks has not been completed yet, so that the operator data receiving interrupt routine is ended and the process returns to the process before the occurrence of the operator data receiving interrupt. . [ZG2] If it is determined in step ZG1 that the initial setting completion flag IEDF is "1: completed", the first event occurrence flag of the task number "7: operator data reception task" in the task management map is set to "1: Outbreak "
Set to. [ZG3] The status of the task number “7: operator data reception task” in the task management map is “2:
It is determined whether the status is “wait” and the wait event value is “1: wait for operator data reception event.” The status is not “2: wait,” or the wait event value is “1: operator data reception event.” If it is not “Waiting”, the controller interrupt processing is terminated and the process returns to the processing before the controller data reception interrupt. If the status of “” is “2: wait” and the wait event value is “1”, this status is set to “1: ready.” [ZG5] The request source task number NSTK exceeds “7” It is determined whether or not the priority of the requesting task is lower than the priority of the controller data receiving task based on whether or not the requesting task number NS If the TK does not exceed “7” and the priority of the requesting task is not lower than the priority of the operator data receiving task, the requesting task number indicating the task executed before the interrupt of the operator data reception Return to the NSTK task [ZG6] If the requesting task number NSTK exceeds “7” in the determination in step ZG5 and the priority of the requesting task is lower than the priority of the operator data reception interrupt task, the request is made. The original task number NSTK is updated to “7: operator data reception task”, and the status of the task number “7: operator data reception task” in the task management map is set to “0: run.” [ZG7] Operation A child data reception event is generated, that is, an operation data reception task is executed. If it is determined in step ZG5 that the task has been executed before the interruption of the operator data reception, the condition is set in the event wait monitor call routine based on the event wait monitor call in one of the tasks. When the condition is satisfied, the operator data reception task is executed.

Next, each task is defined as a key data receiving task,
The main assigner task, sounding task, pre-assigner task, envelope task, pedal data receiving task, and operator data receiving task will be described in this order. In the first processing in each task after resetting at power-on or the like, the processing is started from step A1 in the first step, for example, in a key data receiving task described below. Further, when suspending the processing of a certain task and then resuming the processing thereafter, the interrupted processing is resumed so that the processing at the time of interruption is continued in the task. For example, if an event wait monitor call is made in step A2 of the key data reception task, and an interruption is performed instead of an event occurrence in the determination in the event wait monitor call routine, a key data reception interrupt routine is then generated by the occurrence of a key data reception interrupt. Then, the process is restarted from step A3 following the event waiting monitor call of step A2.

Key Data Receiving Task (FIG. 13) When a key data receiving event occurs, the key data receiving task reads performance information based on a note-on and / or note-off message from the MIDI circuit 20, and generates an assignment request event. . Each step A1
The processing in A7 is as follows. [A1] The note map is cleared, and variables and the like occupied by the key data receiving task are set to initial values. [A2] The request source event value NSET is set to "1" and an event wait monitor call is performed. When the key data reception event occurs, the process proceeds to the next step A3. [A3] Task number “1:” in the task management map
The first event occurrence flag of the key data receive task "
The wait event value is set to “0” and the wait event value is set to “0”. [A4] First, performance information based on the note-on and / or note-off message is read from the MIDI circuit 20, and the MIDI channel number MCNM corresponding to the MIDI channel number, note number, note status and note velocity of the performance information respectively. , Note number NTNM, note status NTST and velocity NT
VL. Next, MI in the MIDI channel map
Let the part number of the MIDI channel number corresponding to the DI channel number MCNM be the part number PTNM. [A5] Note status NTST is "1: note on"
Is determined. If the note status NTST is not "1", the process proceeds to the next step A6, where "1"
If it is, the process proceeds to step A7. [A6] Note-off processing First, search for the tone generation channel numbers whose part numbers and note numbers in the tone generation channel management map are the part number PTNM and the note number NTNM and the note status is "1" in ascending order of key press. , The note status of the tone generation channel number having the smallest key pressing order is “0”.
Set to. Next, the note status of the note map having the part number PTNM with the part number PTNM is updated to "0" and the process returns to step A2. [A7] Note-on processing First, the note status of the note map having the part number PTNM as the part number PTNM is set to "1". Next, an assignment request event is generated. That is, the request destination task number NDTK is set to “2: main assigner task” and the request destination event value NDET is set to “1”, and an event occurrence monitor call is made. Step A
Return to 2.

[0085] The main assigner task (Fig. 14) main assigner task when assignment request event occurs, based on the assignment order be set in later-described Apulian Saina tasks, notes in a predetermined area of the musical tone-generating channel management map Write a number such as NTNM and generate a sounding request event. The processing in each of steps B1 to B7 is as follows. [B1] A tone generation channel management map is initialized, and variables and the like occupied by the main assigner task are set to initial values. Note that the tone generation channel management map
The key press order of each tone generation channel number in
Set to the generation channel number. Also, the N-th assigned order musical tone generation channel number MASS [N] (N is 0, 1,..., 1)
5) respectively correspond to “N (= 0, 1,... 15)”.
Set to. The target assignment order TASN is set to “0”, and the number GACH of assignable musical sound generation channels is set to the maximum number “16”. [B2] The request source event value NSET is set to "1" and an event wait monitor call is performed. When the assignment request event occurs, the process proceeds to the next step B3. [B3] task management map in the task number "2:
Set the wait event value of " Main Assigner Task" to "0",
If set to "0" to the first event occurrence flag. [B4] It is determined whether or not the target assignment rank TASN is less than the number of assignable musical tone generating channels GACN. If the number of assignable musical tone generating channels is not less than GACN, the process returns to step B2 because there are no more musical tone generating channels to be allocated. [B5] If it is determined that it is less than the value in step B4,
Assignment order TASN in the tone generation channel management map
Pending flag 1 of the musical tone-generating channel number corresponding to the musical tone-generating channel number MASS [TASN], a process waiting flag 2 and pending flag 3: "1 during processing wait", the part number in part number PTnM, notes Note Number NTNM Number
, The note status is set to “1”, and the velocity is set to velocity NTVL. In addition, the main assigner
Set the processing flag MAEF to “1: Main assigner processing”
I do. [B6] A sound generation request event is generated. That is, the request destination task number NDTK is set to "3: sounding task" and the request destination event value NDET is set to "2", and an event occurrence monitor call is performed. [B7] The target assignment order TASN is incremented by “1”, and the process returns to step B2.

The tone generation task (FIGS. 15 and 16) The tone generation task instructs the start of rapid decay if the previous tone generation is not completed in the tone generation channel for generating a new tone when a tone generation request event occurs. (First processing). Further, parameters relating to musical tone generation are calculated and set based on the note number NTNM or the like (second processing). If the sound generation has been completed or has been performed, a new sound generation is instructed to the tone generation channel (third processing). The processing in each of the steps C1 to C27 is as follows. [C1] The variables and the like occupied by the tone generation task are set to initial values, the rapid decay end FIFO for storing the tone generation channel number for which rapid decay has been completed is cleared, and the tone generation circuit 26 is initialized. . Further, the third task timer counter value TCNE [3] and the third task time interval TCND [3] are set to “0”, and the task number “3: sounding task” in the task management map is set.
Is set to "1: Requested". [C2] The request source event value NSET is set to “2” and an event wait monitor call is performed. When the sound generation request event occurs, the process proceeds to the next step C3. [C3] First, the wait event value of the task number “3: sounding task” in the task management map is set to “0”, and the second
The event generation flag is set to “0”, and then the tone generation channel number GCTN to be processed is set to “0”. [C4] It is determined whether or not the processing waiting flag 1 of the tone generation channel number corresponding to the tone generation channel number GCTN to be processed in the tone generation channel management map is "1: waiting for processing". This processing waiting flag 1 is "1"
If it is, the process proceeds to the next step C5, and if it is not "1" and the first process (steps C5 to C7) is unnecessary, the process proceeds to step C8. [C5] It is determined whether or not the envelope level of the envelope channel number corresponding to the tone generation channel number GCTN to be processed in the envelope management map is “0”. If the envelope level is not "0", the process proceeds to the next step C6. If the envelope level is "0" and rapid decay processing is not required, the process proceeds to step C7.

[C6] The flag of the tone generation channel number corresponding to the tone generation channel number GCTN to be processed in the tone generation channel management map is set to “1: Rapid decay”, indicating that the sound generation amount is being rapidly decayed. “FFFF
H ", and instructs the corresponding tone generation channel to start rapid decay. When the rapid decay is instructed, the target value is set to" 0 "and the rate is set to the rate for rapid decay. [C7] Set the processing waiting flag 1 of the tone generation channel number corresponding to the tone generation channel number GCTN to be processed in the tone generation channel management map to “ 0.” [C8] Target to be processed It is determined whether or not the tone generation channel number GCTN is less than “15.” If the tone processing target tone generation channel number GCTN is less than “15”, the process proceeds to the next step C9, and if it is less than “15”. If the first process has not been completed for all the tone generating channels, the process proceeds to step C10. And prepares for the processing of the next tone generation channel, and returns to step C4. [C10] Set the tone generation channel number GCTN to be processed to “0”. [C11] In the tone generation channel management map The processing wait flag 2 of the tone generation channel number corresponding to the tone processing target tone generation channel number GCTN is "1: waiting for processing"
Is determined. When the processing waiting flag 2 is "1", the process proceeds to the next Step C12,
If the value is not “1” and the second process (step C12) is unnecessary, the process proceeds to step C13.

[C12] Tone generation target tone generation channel number The values of various parameters related to tone generation and tone envelope generation of the tone generation channel corresponding to the GCTN are stored in the tone generation channel management map in the tone generation channel management map. Note number and velocity of the tone generation channel number corresponding to GCTN, and tone parameters stored in the ROM 23 corresponding to the tone number of the part number in the part map corresponding to the part number of the tone generation channel number corresponding to the tone number From the group, the values of these calculated parameters are applied to the tone generation channel management map in the tone generation channel management map. The tone generation parameter group of the tone generation channel number corresponding to the tone generation channel number GCTN and the tone generation target in the envelope management map Tone generator It is set to the corresponding parameter of the envelope generation parameter group of the envelope channel number corresponding to the channel number GCTN. At the same time, the process waiting flag 2 is set to “ 0”. In addition, the tone generation channel number GC for sound processing in the envelope management map
The truncation prohibition phase number of the envelope channel number corresponding to TN is set to the truncation prohibition phase number of the part number in the part map. Also,
The key pressing order higher than the key pressing order of the tone generating channel number corresponding to the tone generation channel number GCTN to be processed in the tone generating channel management map is updated as follows. The key press order larger than the key press order of the tone generating channel number corresponding to the tone processing target tone generating channel number GCTN is decremented by “1”, and the tone generating channel number corresponding to the tone processing target tone generating channel number GCTN is depressed. The key order is set to “15”. For example, the key pressing order is “5”
When a new tone is assigned to the tone generation channel of No. 6, the key press order of the tone generation channels with the key press order of “6” to “15” is set to “5” to “14”, and the new tone is assigned. The key pressing order of the tone generation channel is set to “15”. [C13] It is determined whether or not the tone generation channel number GCTN to be processed is less than “15”. If the tone generation channel number GCTN to be processed is less than "15", the flow proceeds to the next step C14, and if not, the flow proceeds to step C15. [C14] The tone generation channel number GCTN to be processed is incremented by "1", and the process returns to step C11. [C15] The rapid decay incompletion flag TDNF is set to "0" and sounded
The processing target tone generation channel number GCTN is set to “0”.

[C16] The processing waiting flag 3 of the tone generation channel number corresponding to the tone generation channel number GCTN to be processed in the tone generation channel management map is set to "1:
It is determined whether or not the status is “waiting for processing.” If the processing waiting flag 3 is “1”, the process proceeds to the next step C17, and the third process (steps C17 and C1)
If (8, C21) is unnecessary, the process proceeds to step C19. [C17] The rapid decay flag of the tone generation channel number corresponding to the tone generation channel number GCTN to be processed in the tone generation channel management map is “1: rapid decay”.
Is determined. If the rapid decay flag is not "1", the process proceeds to the next step C18,
If it is "1", the process proceeds to step C21 because the sounding of the previously assigned tone in the tone generating channel to be assigned has not been completed yet. [C18] A target value, a rate, and a correction amount of the first phase are calculated based on the envelope generation parameter group of the envelope channel number corresponding to the tone generation channel number GCTN to be processed in the envelope management map, and the envelope management map is calculated. Set the target value, rate, and correction amount of, and set the phase number to "1".
, The envelope level is set to “0”. Note that the maximum value of the correction amount is “7FFFH”, the minimum value is “6000H” for a sustained tone, and “50” for an attenuated tone.
In addition, the sound generation amount of the tone generation channel number corresponding to the tone generation channel number GCTN to be processed in the tone generation channel management map is set to “8000” in the upper 15 bits of the attack level included in the envelope generation parameter group.
In addition, the truncation prohibition flag is set to “1: truncation prohibition” to the value obtained by adding “H.” Also, the tone generation parameter of the tone generation channel number corresponding to the tone generation channel number GCTN to be processed in the tone generation channel management map. The target value and rate of the envelope channel number corresponding to the tone generation channel number GCTN to be processed in the group and the envelope management map are set in the tone generation circuit 26 by the tone generation channel number GCTN to be processed.
To the tone generation channel corresponding to. In addition, the process waiting flag 3 is set to "0", and the start of musical sound generation is instructed to the corresponding musical sound generation channel. [C19] It is determined whether or not the tone generation channel number GCTN to be processed is less than “15”. If the tone generation channel number GCTN to be processed is less than "15", the flow proceeds to the next step C20, and if not, the flow proceeds to step C22. [C20] The tone generation channel number GCTN to be processed is incremented by "1", and the process returns to step C16.

[C21] The rapid decay non-completion flag TDNF is set to “1: non-completion”, and the flow advances to step C19. [C22] It is determined whether or not the rapid decay non-completion flag TDNF is "1: non-completion". If the rapid decay non-completion flag TDNF is "1", the process proceeds to the next step C23,
If not all “1” but all the tone generation processes are completed, the process returns to step C2. [C23] The request source event value NSET is set to "3" and an event wait monitor call is performed. When either a sounding request event or a timer event for the sounding task occurs, the process proceeds to the next step C24. [C24] The second event occurrence flag of the task number “3: sounding task” in the task management map is “1”
Is determined. If the second event occurrence flag is not "1", the process proceeds to the next step C25,
If "1", the process returns to step C3 because a sound generation request event has occurred. [C25] The first event occurrence flag of the task number “3: sounding task” in the task management map is “1”
For the occurrence of a timer event is, the task number in task management map: wait event value of "3 pronunciation task""0", the first event occurrence flag "0"
Set to. [C26] It is determined whether or not the quick decay end FIFO provided in the tone generator 26 is empty. If the quick decay end FIFO is empty, the flow returns to step C23, and if not, the flow proceeds to the next step C27. [C27] The tone generation channel numbers of the tone generation channels whose envelope levels have become “0” by the rapid attenuation process from the rapid decay end FIFO are sequentially lowered, and the tone in the tone generation channel management map corresponding to the lowered tone generation channel number. The flag of the occurring channel number during rapid decay is set to “0”. Then, the process returns to step C15.

Pre-Assigner Task (FIG. 17) The pre-assigner task starts executing when a timer event for the pre-assigner task occurs, and updates the assignment order based on the sound generation amount. Each step D1 to D11
Is as follows. [D1] The variables and the like occupied by the pre-assigner task are set to initial values. Also, the fourth task timer counter value
TCNE [4] is set to “5”, and the fourth task time interval TCND [4] is set to “4”. Further, the timer processing request flag of the task number “4: pre-assigner task” in the task management map is set to “1: requested”. The Nth pre-assigned order tone generation channel number PASS [N]
(= 0, 1,... 15) ". [D2] The request source event value NSET is set to" 1 "and an event wait monitor call is performed. When a timer event for the pre-assigner task occurs, the following occurs. Step D3
Proceed to. [D3] Task number “4: in the task management map”
Set the wait event value of the " pre-assigner task" to "0".
1 Set the event occurrence flag to “0”. [D4] The main assigner processing flag MAEF is set to "0". [D5] Steps E19 and E2 of the envelope task which are set in steps C6 and C18 of the sound generation task and described later.
6, the tone generation amount of each tone generation channel number of the tone generation channel management map is updated by the pre-assigner tone generation amount PL of the corresponding tone generation channel number GN.
EV [GN]. Also, the rapid decay flag of each tone generation channel number in the tone generation channel management map is set to the corresponding pre-assigner rapid decay flag PACT [GN] of the corresponding tone generation channel number GN, and the truncation inhibition flag is set to the corresponding tone generation channel. The pre-assigner truncation prohibition flag PAIT [GN] of the number GN is set, and the note state is set.
Let the status be the pre-assignment status PAST [GN] of the corresponding tone generation channel number GN, and the key press order be the pre-assigner key press order PAPN [GN] of the corresponding tone generation channel number GN. The reserve number of each part number in the part map is defined as the pre-isana reserve number PTRN [PPTN] of the corresponding pre-assigner part number PPTN. [D6] The pre-assignment order is set. The contents of this processing will be described later in detail with reference to the flowchart of FIG. [D7] Lock the task. That is, MIDI
The interrupt from the circuit 20 and the timer circuit 25 is prohibited. Until the task lock is released, execution of other tasks is prohibited, and continuation of execution of this task is guaranteed. [D8] It is determined whether or not the main assigner processing in-progress flag MAEF is "0: non-processing". If the main assigner processing flag MAEF is "0", the process proceeds to step D1.
Go to 0. [D9] If the main assigner processing flag MAEF is not "0" in the determination of step D8, that is, an interrupt from the MIDI circuit 20 based on a note-on message received via the MIDI bus during the processing of steps D5 and D6 has occurred. When the main assigner task is executed by a series of processes, since the tone generation mode of the musical tone generation channel is different from that at the start of step D5, the process returns to step D4 to release the task lock and reset. [D10] First, the N-th pre-assigned order tone generating channel number PASS [N] is set to the corresponding N-th assigned order tone generating channel number MASS [N], and the target assignment order TASN is set to “0”. Next, the total number PRCN of preassigned reserved over tone generating channels is set as the assignable number of tone generating channels GACN. [D11] Release the task lock and return to step D2. Note that an interrupt generated during the task lock is executed after the task lock is released.

Preassignment Order Setting Routine (FIG. 18) The preassignment order setting routine in step D6 will be described below with reference to FIG. In this routine, the pre-assignment order is rapidly decayed from the last place,
During an attack, during a key press reserve, and the like, the order is set in the other order, and is set in a new order of the key press, and is set in an order of increasing the pre-assigner sounding amount in the case of. In steps D601 to D606, the tone generation channel number of the tone generation channel that is rapidly attenuating in the order of note-on reception is set to the Nth preassigned priority tone generation channel number PASS [N]. [D601] The pre-assignment order number N and the key depression order PN to be processed are set to “15”, and the reserve processing numbers PTRC [PPTN] of all pre-assigner part numbers PPTN are set to “1”. [D602] It is determined whether or not the key depression order PN to be processed exceeds “0”. If it does not exceed “0”, the process proceeds to step D607. [D603] The tone generation channel number of the pre-assigner key depression order PAPN [GN] of the same tone generation channel number GN as the key depression order PN to be processed is set as the tone generation channel number GN, and the tone generation channel number in the tone generation channel management map. The part number of the tone generation channel number corresponding to GN is defined as a preassigner part number PPTN. [D604] It is determined whether or not the pre-assigner rapid decay flag PACT [GN] of the tone generation channel number GN is "1". If not “1”, the process proceeds to step D606. [D605] The Nth preassigned order tone generation channel number PASS [N] of the preassigned order N is replaced with the Nth preassigned order tone generation channel number PASS [N] corresponding to the tone generation channel number GN. For example, N is "15"
GN with PASS [N] (PASS [15]) of “11” and PN of “15”
Is "9" and PASS [N] is "9", N is "8", that is, if PASS [8] is "9", PASS [15] is changed to "9" and PASS [8 ] To “11”. Therefore,
The tone generation channel number for the pre-assignment order N of “15” is “9”. Further, the pre-assignment order number N is decremented by “1”, and the reserved processing number PTRC [PPTN] of the pre-assigner part number PPTN is incremented by “1”.

[D606] The key depression order PN to be processed is decremented by "1", and the flow returns to step D602.
In steps D607 to D613, the tone generation channel number of the tone generation channel being attacked in the order of note-on reception is set to the Nth pre-assigned priority tone generation channel number PASS.
Set to [N]. [D607] The key depression order PN to be processed is set to “15”. [D608] It is determined whether the pre-assignment order N exceeds “0”. If it does not exceed “0”, the process proceeds to step D622. [D609, D610] Steps D602, D603
The same process as is performed. [D611] It is determined whether or not the pre-assigner truncation prohibition flag PAIT [GN] of the tone generation channel number GN is “1”. If not "1", step D613
Proceed to. [D612, D613] Steps D605, D606
The same process as is performed. In steps D614 to D621, the tone generation channel number of the tone generation channel whose note status is "1" is set to the Nth pre-assigned priority tone generation channel number PASS in the order of note-on reception up to the key depression reserve number.
Set to [N]. [D614] The key depression order PN to be processed is set to “15”. [D615] It is determined whether the pre-assignment order N is less than "0". If less than "0", step D62
Proceed to 2. [D616, D617] Steps D602, D603
The same process as is performed. [D618] Pre-assigner rapid decay flag PACT [GN] of tone generation channel number GN and tone generation channel number
It is determined whether the preassigner truncation prohibition flag PAIT [GN] of GN is not both “1” and the preassigner note status PAST [GN] of the musical tone generation channel number GN is “1”. If either PACT [GN] or PAIT [GN] is “1” or if PAST [GN] is not “1”, the process proceeds to step D621. [D619] It is determined whether or not the reserved number PTRC [PPTN] of the pre-assigner part number PPTN exceeds the reserved number PTRN [PPTN] of the pre-assigner part number PPTN. If it exceeds, the process proceeds to Step D621. [D620, D621] Steps D605, D606
The same process as is performed. [D622] Nth preassigned order tone generation channel number PASS [N] in which preassigned order N is from “0” to N
Are rearranged in ascending order of the pre-assigner sound volume PLEV [GN] of the corresponding tone generation channel number GN. For example, PA SS [0] =
1, PA SS [1] = 3, PA SS [2] = 5, ..., PLEV [1] =
0080H, PLEV [3] = 0040H, PLEV [5] = 000
0H,... And N = 3, PA SS [0]
= 5, PA SS [1] = 3, and PA SS [2] = 1. Also, the total number PRCN of pre-assigned reserved over tone generation channels is set to N +.
Set to 1. When the processing ends, the pre-assignment order setting routine ends, and the routine proceeds to step D7.

Envelope Task (FIGS. 19 and 20) The envelope task starts executing when a timer event for the envelope task occurs, sequentially updates the envelope level and sound volume of each envelope channel, and simultaneously executes the note status and sostenuto status. , Calculate a new target value and rate based on the damper flag and the envelope generation parameters,
The transfer to the tone generating channel of the tone generating circuit 26 is performed.
The processing in each of steps E1 to E28 is as follows. [E1] The envelope management map is cleared, variables and the like occupied by the envelope task are set to initial values, the fifth task timer counter value TCNE [5] is set to "4", and the fifth task time interval TCND [5 ] To “4”. Further, the timer processing request flag of the task number “5: Envelope task” in the task management map is set to “1: Requested”. [E2] The request source event value NSET is set to "1" and an event wait monitor call is performed. When the envelope task timer event occurs, the process proceeds to the next step E3. [E3] Task number “5: in the task management map”
Set the wait event value of the “ envelope task” to “0”,
The 1-event occurrence flag is set to “0”, and the envelope processing target number ECTN is set to “0”. [E4] multiplying the data scan clock. [E5] It is determined whether or not the rapid decay flag of the tone generation channel number corresponding to the envelope processing target number ECTN in the tone generation channel management map is "1: rapid decay". If the flag during rapid decay is not "1", the process proceeds to the next step E6. If the flag is "1", the process proceeds to step E10 because the envelope processing by the envelope task is unnecessary. [E6] The part number of the tone generation channel number corresponding to the envelope processing target number ECTN in the tone generation channel management map is set to the envelope processing target part number EPNM.
And

[E7] The sustain tone flag of the part number EPNM to be subjected to envelope processing in the part map is “1”.
Is determined. This sustain sound flag is "1"
If not, the process proceeds to the next step E8, and if "1", the process proceeds to step E9. [E8] It is determined whether the target value of the envelope channel number corresponding to the envelope processing target number ECTN in the envelope management map is “0” and the envelope level is “0”. If this target value is "0" and the envelope level is "0", the tone generation has ended, and the tone generation channel management map
Tones corresponding to envelope processing target number ECTN
Set the sound volume of the generated channel number to "0" and prohibit truncation.
The stop flag is set to "0", and the process proceeds to step E10. If any one is not "0", the process proceeds to step E13. [E9] The note status of the tone generation channel number corresponding to the envelope processing target number ECTN in the tone generation channel management map is not “1”, and the target value of the envelope channel number corresponding to the envelope processing target number ECTN in the envelope management map is It is determined whether or not the envelope level is “0” and the envelope level is “0”. If the note status is not "1", the target value is "0", and the envelope level is "0", the tone generation has ended, and the tone generation channel management map
Tones corresponding to envelope processing target number ECTN
Set the sound volume of the generated channel number to "0" and prohibit truncation.
The stop flag is set to "0", and the process proceeds to step E10. If the note status is not "1", the target value is not "0", or the envelope level is not "0", the process proceeds to step E21. [E10] The task lock is released. [E11] Envelope processing target number ECTN is "15"
It is determined whether it is less than. If the envelope processing target number ECTN is less than "15", the process proceeds to the next step E12, and if not, the process returns to step E2. [E12] The envelope processing target number ECTN is incremented by "1", and the process returns to step E4. [E13] The envelope level and the rate of the envelope channel number corresponding to the envelope processing number ECTN in the envelope management map are added to obtain a new envelope level and an envelope level ELEN. The note number of the tone generation channel number corresponding to the envelope processing target number ECTN in the generation channel management map is read out and set as the envelope processing target note number ENNM. [E14] It is determined whether or not the note status of the tone generation channel number corresponding to the envelope processing target number ECTN in the tone generation channel management map is "1: note on". If the note status is not "1", the process proceeds to the next step E15, and if it is "1", the process proceeds to step E17.

[E15] Envelope processing in the note map in which the damper flag of the part number corresponding to the envelope processing target part number EPNM in the part map is “1: damper on” or the part number is the embedding processing target part number EPNM Target note number
It is determined whether the sostenuto status of the note number corresponding to ENNM is “1: sostenuto on”. If either the damper flag or the sostenuto status is "1", the process proceeds to step E17, and if neither is "1", the process proceeds to the next step E16. [E16] Envelope processing corresponding to the note-off sound generation state is performed. That is, the target value and the rate of the envelope channel number corresponding to the envelope processing target number ECTN in the envelope management map are calculated and updated based on the note status that the note status is note-off and the group of envelope generation parameters, and the target value and the rate are updated. The data is transferred to the corresponding tone generating channel of the tone generating circuit 26. When the processing is completed, the process proceeds to step E18. [E17] Envelope processing corresponding to the note-on sound generation state is performed. In other words, the target value and rate of the envelope channel number corresponding to the envelope processing target number ECTN in the envelope management map are calculated and updated based on the note status that the note status is note-on and the envelope generation parameter, and the target value and rate are generated as a tone. The signal is transferred to the corresponding tone generation channel of the circuit 26. When the processing is completed, the next step E
Proceed to 18. [E18] It is determined whether or not the phase number of the envelope channel number corresponding to the envelope processing target number ECTN in the envelope management map exceeds the truncation prohibition phase number. If this phase number does not exceed the no truncation phase number,
Proceeding to step E10, the sound volume is not updated. If the phase number exceeds the truncation prohibition phase number, the process proceeds to step E19 to update the sound volume.

[E19] The tone generation amount of the tone generation channel number corresponding to the envelope processing target number ECTN in the tone generation channel management map is updated. The contents of this processing will be described later in detail with reference to the flowchart of FIG. [E20] The truncation prohibition flag of the tone generation channel number corresponding to the envelope processing target number ECTN in the tone generation channel management map is set to “0”, and the process proceeds to step E10. [E21] The same processing as step E13 is performed. [E22] The same determination as in step E14 is made. If the note status to be judged is not "1", the process proceeds to the next step E23, and if it is "1", the process proceeds to step E28. [E23] The same determination as in step E15 is made. If either the damper flag or the sostenuto status to be determined is "1", step E2 is executed.
The process proceeds to step E7, and if none is "1", the process proceeds to the next step E24. [E24] The same processing as step E16 is performed. [E25] The same determination as in step E18 is made. If the phase number exceeds the truncation prohibition phase number, the process proceeds to the next step E26, and if not, the process proceeds to step E10. [E26] The tone generation amount of the tone generation channel number corresponding to the embedding process target number ECTN in the tone generation channel management map is updated. The details of this processing will be described later. When the process ends, the process proceeds to a step E20. [E27] The rate of the envelope channel number corresponding to the envelope processing target number ECTN in the envelope management map is set to “0”, and the target value and the rate are transferred to the corresponding tone generating channel of the tone generating circuit 26. When the process is completed, the process proceeds to step E25. [E28] The same processing as step E17 is performed. When the process is completed, the process proceeds to step E25. As described above, the processing relating to the fine transition of the envelope level during the rapid decay and between the timer events is performed in the tone generation channel.

Routine for Updating the Amount of Attenuation Sound (FIG. 21) In the routine for updating the amount of attenuation of the decay system in step E19, the volume of the sound of the decay system is calculated based on the note status, sostenuto status, damper flag, and envelope level. Calculate and update based on. Each step E
The processing from 1901 to E1910 is as follows. [E1901] It is determined whether or not the note status of the tone generation channel number corresponding to the envelope processing target number ECTN in the tone generation channel management map is “1: note on”. If the note status is not "1", the flow advances to the next Step E1902, and if it is 1, the flow advances to Step E1907. [E1902] It is determined whether or not the sostenuto status of the note number corresponding to the envelope processing target note number ENNM in the note map whose part number is the envelope processing target part number EPNM is "1: sostenuto on". This sostenuto status is "1"
If not, the flow advances to the next Step E1903, where "1" is set.
If so, the process proceeds to step E1910. [E1903] It is determined whether or not the damper flag of the part number corresponding to the envelope processing target part number EPNM in the part map is "1: damper on". If the damper flag is not "1", the flow proceeds to the next step E1904, and if it is "1", the flow proceeds to step E1905. [E1904] The correction amount ECLV is set to “0”, and the flow advances to step E1906.

[E1905] First, the correction amount ECLV is set to the damper-on initial correction amount "2500H".
Proceed to 1906. [E1906] First, set the envelope level ELEN to “2”
The value obtained by adding the correction amount ECLV to the value obtained by dividing by the Eq. Next, the tone generation amount of the tone generation channel number corresponding to the envelope processing target number ECTN in the tone generation channel management map is updated and set to the tone generation amount EVOL, and this routine ends. [E1907] The correction amount of the envelope channel number corresponding to the envelope processing target number ECTN in the envelope management map is set as a correction amount ECLV. [E1908] It is determined whether or not the correction amount ECLV exceeds the note-on minimum correction amount “3000H”. Correction amount
When the ECLV exceeds “3000H”, the process proceeds to the next step E1909, and when the ECLV does not exceed “3000H”, the process proceeds to step E1906. [E1909] First, the correction amount ECLV is decremented by the note-on reduction amount “40H”. Next, the correction amount of the envelope channel number corresponding to the envelope processing target number ECTN in the envelope management map is updated to the correction amount ECLV, and the flow advances to step E1906. [E1910] The correction amount ECLV is set to the sostenuto-on initial correction amount “3000H”, and the flow advances to step E1906.

Updating routine of sound volume of continuous sound system In the routine of updating the sound volume of the continuous sound system in step E26, the sound volume of the musical sound of the continuous sound system is calculated by processing according to the routine of updating the sound volume of the damped sound system. Update.
The processing in each step in this update routine is performed in each step E190 in the update routine of the sound volume of the damped sound system.
Although similar processing is performed corresponding to each of Nos. 1 to 1910, the following points are different. In step E1905, the correction amount ECLV is set to the damper-on initial correction amount “35”.
In step E1908, the correction amount ECLV is set to the minimum note-on correction amount “4000”.
H ”is determined. Step E1910
In, the correction amount ECLV is changed and set to the sostenuto-on initial correction amount “4000H”.

[0121] When the pedal data reception task pedal data receiving task pedal data reception event occurs, reads the pedal data from the MIDI circuit 20, is stored in a predetermined area. [F1] Initialize variables and the like occupied by this pedal data reception task. [F2] Set the request source event value NSET to “1”,
Performs an event wait monitor call. When the pedal data reception event occurs, the process proceeds to the next step F3. [F3] Task number “6: in the task management map”
Wait event value of “ Pedal data reception task” is “0”
, The first event occurrence flag is set to “0”. [F4] The pedal data is read from the MIDI circuit 20, and the corresponding data in the part map and / or the tone generation channel management map is updated. For the data relating to the damper pedal, the MIDI channel map checks the MIDI channel number part number corresponding to the MIDI channel number included in the read data, and sets the damper flag of the part number in the part map to the read damper pedal data. Update.
For data on sostenuto pedals, see MID
In the I channel map, the part number of the MIDI channel number corresponding to the MIDI channel number included in the read data is checked, the sostenuto status of the part number in the note map is read, and the read sostenuto pedal data is “1”, and In the case of depressing, the note status is updated so as to be the same as the corresponding note status, and the Sotesnoot pedal data is set to “1”.
However, if it indicates that the sostenuto pedal has been released, the value is updated to "0". Regarding the data relating to the hold pedal whose function is the same as that of the damper pedal, the same processing as the data relating to the aforementioned damper pedal is performed.
Regarding the data related to the hold pedal whose function is the same as that of the sostenuto pedal, the same processing as the data related to the above-described sostenuto pedal is performed. When the corresponding process ends, the process returns to the step F2.

[0122] When the operator data reception task operator data reception task operation element data reception event occurs, reads the operator data from the MIDI circuit 20, it is stored in a predetermined area. [G1] The MIDI channel map and part map and variables occupied by the operator data reception task are set to initial values. [G2] The request source event value NSET is set to “1”, and the initial setting completion flag is set to “1”, and an event wait monitor call is performed. When an operator data reception event occurs, the process proceeds to the next step G3. [G3] Task number “7: in the task management map”
The wait event value of the " operator data reception task" is "0"
, The first event occurrence flag is set to “0”. [G4] The controller data is read from the MIDI circuit 20, and the corresponding data of the MIDI channel map and the part map are updated. For example, data on tone number
In the MIDI channel map, the part number of the MIDI channel number corresponding to the MIDI channel number included in the data is checked, and the tone color number of the part number corresponding to the part number in the part map is updated to data relating to the tone number. The truncation prohibition phase number, the reserve number, and the continuous sound flag corresponding to the number are read from the ROM 25 and stored in the corresponding area. When the corresponding process ends, the process returns to the step G2.

The overall operation of the electronic musical instrument described above will be described. (1) Initial setting When the power is turned on, after processing by the reset routine ZA of the monitor program (steps ZA1 to ZA3), a key data receiving task (routine A), a main assigner task (routine B), and a sound generation task (routine C) , A pre-assigner task (routine D), an envelope task (routine E), a pedal data receiving task (routine F), and an operator data receiving task (routine G) are sequentially performed in accordance with task priorities (step A1). , A2, steps B1, B2, steps C1, C2, steps D1, D2, steps E1, E
2, steps F1 and F2, steps G1 and G2). (2) Sound generation processing based on the received note-on message The note-on message is received via the MIDI bus and
When an interrupt is issued from the IDI circuit 20, a key data reception interrupt processing routine ZE of the monitor program is started. (2-1) Since the key data reception interrupt processing routine ZE is in a state of waiting for a key data reception event (steps ZE1 and ZE3), the status of the task number “1: key data reception task” in the task management map is set to “0”. : Run "(step ZE5). Next, a key data receiving task is executed (steps A2 to A
7), the performance information is read from the MIDI circuit 20, and the note map is updated based on the performance information.
If the note is on, an event occurrence monitor call is made (step A7). (2-2) In the event occurrence monitor call routine ZC of the monitor program, the first event occurrence flag of the task number “2: main assigner task” in the task management map is set to “1” (step Z).
C1), the status is set to "1: ready" (steps ZC2, ZC3). Since the task priority of the key data receiving task is higher than the task priority of the main assigner task, the key data receiving task is started again (step ZC4), and an event wait monitor call is performed in the key data receiving task (step ZC4). Step A2).

(2-3) In the event waiting monitor call routine ZB of the monitor program, it is checked whether or not a key data reception event has occurred (step Z).
B1). As a result of the examination, since the next key data reception event has not yet occurred, the status of the task number “1: key data reception task” in the task management map is set to “2: wait” (step ZB2), and the task The management map is checked (step ZB3). As a result of checking this task management map, the status is "1: ready"
Since the task number of the highest priority task is "2: main assigner task", the status of this task number "2: main assigner task" is set to "0: run" (step ZB4). The main assigner task is executed (step ZB5). In the main assigner task writes and note number NTNM the tone-generating channel management map (Step B2~B 5). Next, an event occurrence monitor call is performed (step B 6 ). (2-4) In the event occurrence monitor call routine ZC of the monitor program, the second event occurrence flag of the task number "3: sounding task" in the task management map is set to "1", and the status is set to "1: ready". Set to. Since the task priority of the main assigner task is higher than the task priority of the sounding task, the main assigner task is restarted, the target assignment priority is incremented by “1” in the main assigner task, and the next assignment is performed. updates to assign rank (step B 7), waits for an event monitor call (step B2). (2-5) It is checked whether or not an assignment request event has occurred in the event waiting monitor call routine ZB of the monitor program. As a result of the examination, since the next assignment request event has not yet occurred, the status of the task number “2: main assigner task” in the task management map is set to “2: wait”, and the task management map is examined. As a result of examining the task management map, the task number of the highest priority task whose status is "1: ready" is "3: sounding task", so that the status of the task number "3: sounding task" is "0: run". "" To execute the pronunciation task. In this tone generation task, various parameters relating to tone generation are calculated and set based on the note number NTNM and the like written in the tone generation channel management map, and the start of tone generation is instructed (steps C2 to C27). Next, an event wait monitor call is performed (step C2).

(2-6) It is checked whether or not a sound generation request event has occurred in the event waiting monitor call routine ZB of the monitor program. As a result of the check, since the next sounding request event has not yet occurred, the status of the task number “3: sounding task” in the task management map is set to “2: wait”, and the task management map is checked. As a result of examining the task management map, if the status of all task numbers is “2: wait”, sleep. (3) When a corresponding timer event occurs, the pre-assigner task (routine D) updates the assignment order based on the tone generation amount in the tone generation channel management map (steps D2 to D11). Next, an event wait monitor call is performed (step D2). (4) When the corresponding timer event occurs, the envelope task (routine E) executes the tone generation of the tone generation channel management map and the envelope management map based on the note status, pedal data, the tone generation channel management map, and the envelope management map. Update the envelope level and the like (steps E2 to E28).
Next, an event wait monitor call is made (step E).
2).

As described above, in the electronic musical instrument of this embodiment, the tone generating channels to which new musical tones are assigned are selected from the tone generating channels not to be reserved in order of decreasing sound volume. Set the pronunciation amount almost as follows,
This makes it difficult to select a tone generation channel in the note-on state or the pedal-on state. When a note-on is received, if rapid decay is required, "FFFFH" is set.
During the attack, set to attack level / 2 + "8000H". When the attack is completed and the note is on, the envelope level is set to (envelope level / 2 + correction amount). Here, the correction amount is set to the note-on initial correction amount at the time of note-on, and when the attack ends, the note-on decreasing amount is sequentially reduced by the note-on decreasing amount at predetermined time intervals until the note-on minimum correction amount is reached during the note-on state. Even when the note is off and the pedal is on, the envelope level is set to (envelope level / 2 + correction amount). The correction amount is set based on the pedal-on initial correction amount according to the type of the pedal that is in the ON state. When the note-off state and all pedal states are off, the envelope level /
Set to 2. It should be noted that the tone generation channel generating the attenuated tone and the tone generation channel generating the sustained tone are differently weighted. However, the same weight may be used. The initial correction amount, the reduction amount, and the minimum correction amount may be changed according to the timbre, the pitch , the performance mode, and the like.
Note that a tone that suppresses vibration of the sounding body during key depression
In this case, a negative correction may be performed. Further, the reduction of the note-on correction amount is started after the end of the attack, but may be started after the start of sound generation. Further, although the correction amount in the pedal-on state is fixed, the initial correction amount may be set at the time of transition to the pedal-on state, and thereafter the decrease may be started. In this case, the decrease may be started from the first note-off reception after setting the initial correction amount. Further, the initial correction amount when the pedal is turned on is set to the predetermined value, but the predetermined value may be changed and set based on the tone color, the pitch, and the like. Although the weighting is performed by addition, the weighting may be performed by multiplication or the like. No correction is made if the sound volume is less than the predetermined value.
You may do so. Also, instead of the envelope level,
Envelope detected from the amplitude level of the tone signal to be pronounced
A loop level or a simulated level may be used. Alternatively, a pseudo envelope level may be used. Further, in the case of a continuous tone musical tone, an attack level or a value calculated based on a tone color, a pitch, a velocity, or the like may be used instead of the envelope level during note-on.

In order to simplify the processing, the reserve processing may be omitted, and the assignment order may be set based on only the pre-assigner sound generation amount. Alternatively, the assignment to the tone generation channel during the attack and the rapid decay may be performed without prohibiting the assignment. In other words, the process of prohibiting assignment when the target assignment order TASN in step B4 becomes larger than the number of assignable musical tone generating channels GACN is deleted. If the target assignment order TASN exceeds “15”, the assignment is prohibited. Alternatively, the target assignment order TASN may be returned to “0”, or the assignment order may be reset. In this case, the assignment order of the tone generation channel under attack is later than the tone generation channel after the attack is completed, and the assignment order of the tone generation channel under rapid decay is later than the tone generation channel under attack. . In this case, in the pre-assignment order setting routine, only the process of setting the N-th pre-assignment order musical sound generation channel number PASS [N] in order of decreasing pre-assigner sounding amount. Since the order of key depression is desirable as the selection order of the tone generation channels during the rapid decay, it is preferable that the sound generation amount of the tone generation channel under the rapid decay be a value obtained by adding the key depression order to “FFF0H”. Further, in order to simplify the rearrangement process based on the sound generation amount, the tone generation channels whose sound generation has been completed may be set to a smaller order of the assignment order prior to the rearrangement process. For example, steps D603 to D6 of the pre-assignment order setting routine
Prior to the process of step 06, the tone generation channel numbers of the tone generation channels whose tone generation has been completed are sequentially set to the Nth preassigned priority tone generation channel number PASS [N]. In addition, the assigning order of the tone generating channels whose sounding amount is equal to or less than a predetermined level is set in the order of key press, the order of the tone generating channel number, or the order in which the sound amount becomes equal to or lower than the predetermined level. May be simplified. The truncation prohibition phase number is the phase number at which the attack ends, but may be changed according to the period when the period immediately affecting the performance expression immediately after the start of sounding is longer. For example, a decay period may be included.

[0128] may be early to assign rank of the musical tone-generating channel in the battered relationship subjected to the so-called barrage processing. For example, when the processing of step D5 of the pre-assigner task is completed, a continuous tone-generating tone generating channel that generates a tone of the same pitch in the same part is detected, and the pre-assigner tone volume PLEV [GN] of the tone generating channel number GN is detected. Is changed as follows before proceeding to step D6. The pre-assigner sound volume PLEV [GN] of the tone generation channel number GN of the tone generation channel whose note status is note-off and which has a continuous tapping relationship with the tone generation channel whose note status is note-on is 1
If the note status of all the tone generating channels in the continuous tapping relationship is note-off, the musical tone generating channels of the tone generating channels in the tapping relationship except for the pre-assigner sound volume PLEV [GN] of the largest tone generating channel number GN The pre-assigner sound volume PLEV [GN] of the number GN is changed to 1/10.

The setting of the assignment order is described in JP-A-64-193.
This may be performed by setting a link as in the technology disclosed in Japanese Patent Publication No. 93. Although the multitimbral electronic musical instrument has been described, it goes without saying that the present invention can be applied to an electronic musical instrument that produces a musical tone of a single tone.

When a single musical tone is formed by musical tones (constituent tones) generated by a plurality of musical tone generating channels, processing such as sound generation may be performed in units of musical tones or may be performed for each constituent tone. When comparing the sound volume in the selection of the allocation target in the case of performing the musical sound as a unit, the sum of the sound volumes of the constituent sounds, the sum of the sound volumes weighted by the importance of the constituent sounds, or the maximum sound volume or the importance It is preferable to process the sounding amount of a high constituent sound (the sounding amount is calculated only for this constituent sound) as the sounding amount of a musical sound. The instruction to start the generation of musical tones is given in units of musical tones when all constituent sounds are ready. Even in the case of performing for each constituent sound, the start of generation of musical sounds should be instructed in units of musical sounds when all constituent sounds are ready, so that inconvenience caused by irregularly starting each constituent sound is avoided. good. To determine whether a sound is a component of the same tone, an area for discriminating the tone is provided in a tone generation channel management map, etc. It is better to judge by the identification symbol. Although the present embodiment is based on multitask processing, it may be implemented by single task processing. Although the assignment order is set in advance and the pre-assignment process is selected according to the set assignment order, a general process of selecting a tone generation channel to which a new tone is assigned each time note-on information is received may be used. Although an electronic musical instrument without a keyboard has been described, it is needless to say that the present invention can be applied to an electronic keyboard musical instrument with a keyboard, an automatic rhythm, and the like.

[0141]

As described above, according to the present invention, even when a so-called level assignment method is adopted as a method of selecting a tone generation channel to which new tone information is assigned in an electronic musical instrument, key presses and the like can be performed. The note-on state and pedal state are considered in the selection, including the key press order, etc. This eliminates discomfort in the performance expression caused by the selection. In the case of multi-timbral electronic musical instruments, the tone generation channel can be selected based on a common evaluation criterion that is suitable for both the attenuated sound system and the sustained sound system. The above discomfort is reduced.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a multi-timbral electronic musical instrument to which an assigner as one embodiment of the present invention is applied.

FIG. 2 is a diagram showing a MIDI channel map.

FIG. 3 is a diagram showing a part map.

FIG. 4 is a diagram showing a note map.

FIG. 5 is a diagram showing an envelope management map.

FIG. 6 is a diagram showing a task management map.

FIG. 7 is a diagram showing a tone generation channel management map.

FIG. 8 is a flowchart showing a reset routine.

FIG. 9 is a flowchart showing an event wait monitor call routine.

FIG. 10 is a flowchart showing an event occurrence monitor call routine.

FIG. 11 is a flowchart showing a timer interrupt processing routine.

FIG. 12 is a flowchart showing a key data reception interrupt processing routine.

FIG. 13 is a flowchart showing a key data reception task.

FIG. 14 is a flowchart showing a main assigner task.

FIG. 15 is a part of a flowchart showing a sound generation task.

FIG. 16 is a part of a flowchart showing a sound generation task.

FIG. 17 is a flowchart showing a pre-assigner task.

FIG. 18 is a flowchart showing a pre-assignment order setting routine.

FIG. 19 is a part of a flowchart showing an envelope task.

FIG. 20 is a part of a flowchart showing the envelope task.

FIG. 21 is a flowchart showing a routine for updating the sound generation amount of the damped sound system.

FIG. 22 is a diagram illustrating an example of a relationship between a sound generation amount and the like and an evaluation level for explaining the operation of the assigner of the electronic musical instrument according to the present invention.

[Explanation of symbols]

 Reference Signs List 20 MIDI circuit 22 Central processing unit (CPU) 23 ROM (read only memory) 24 RAM (random access memory) 26 Musical sound generation circuit

Continuation of the front page (56) References JP-A-63-293595 (JP, A) JP-A-1-169496 (JP, A) JP-A-2-216196 (JP, A) JP-A-2-220098 (JP , A) JP-A-58-97092 (JP, A) JP-B-1-28397 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) G10H 1/18 101

Claims (2)

(57) [Claims] 1. A first detecting means for detecting a tone generation amount of each tone generating channel or a value corresponding thereto, and a second detecting means for detecting a note status of each tone generating channel.
And a calculating means for calculating an evaluation level of each musical tone generating channel based on the amount of sound detected by the first detecting means or a value corresponding thereto, and For a tone generating channel whose note status is note-on, weighting is performed so as to make it difficult to select the tone generating channel in calculating the evaluation level of the tone generating channel, and the weight is reduced as time elapses in the note-on state. An assigner for an electronic musical instrument, comprising: a correction unit configured to perform such correction; and a selection unit that selects a tone generation channel to which new tone information is assigned based on the evaluation level of each tone generation channel calculated by the calculation unit. 2. The sound of a decay sound and the sound of a continuous sound are combined.
Applied to multi-timbral electronic musical instruments handling, attenuation
Commonly used for tonal and sustained tones
An assigner for an electronic musical instrument according to claim 1.