JP3296518B2 - Electronic musical instrument - 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 capable of changing characteristics of a sound effect controlled by pedal operation.

[0002]

2. Description of the Related Art In recent years, electronic musical instruments such as electronic pianos and electronic organs have been developed and put to practical use. In such an electronic musical instrument, for example, by transmitting musical sound data generated by operating a keyboard or an operation panel to a sound source provided inside the electronic musical instrument, a musical sound signal corresponding to the musical sound data is generated in the sound source, and this is generated. A musical sound is generated by converting the sound signal into a sound signal using a speaker.

Incidentally, the electronic musical instrument is often provided with a pedal simulating, for example, an acoustic piano in order to generate a predetermined sound effect. Such pedals include, for example, a damper pedal for controlling the time until a musical sound is muted, a soft pedal for lowering the volume to make the sound softer, and a damper pedal for the musical sound corresponding to the pressed key. There is a sostenuto pedal or the like that provides the same effect as.

[0004] Of these various pedals, a damper pedal is generally used to mute a musical tone for a predetermined time when the pedal is not depressed, and to prolong the time until the musical tone is muted when the pedal is depressed. ing. In recent years, when the damper pedal is depressed halfway, the sound effect (pedal effect) that occurs when all steps are depressed
Electronic musical instruments that provide a different acoustic effect (half-pedal effect) have also been developed.

[0005]

However, in the above-mentioned conventional electronic musical instruments, the relationship between the pedal depression amount and the degree of application of the sound effect is predetermined, and cannot be arbitrarily changed by the player. For this reason, for example, even if a beginner or the like tries to half-pedal effect by depressing the pedal halfway, there is a problem that the intended sound effect cannot be obtained. In addition, even for advanced users, there is a problem that the user cannot adapt to the relationship between the predetermined pedal depression amount and the degree of application of the sound effect, and cannot perform with the intended sound effect.

[0006] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electronic musical instrument that can easily obtain a sound effect intended by a player by operating a predetermined pedal. .

[0007]

In order to achieve the above object, an electronic musical instrument according to the present invention comprises: a designating means for designating a predetermined sound effect characteristic; a pedal for outputting pedal position data in accordance with a depression amount; Coefficient generating means for generating a coefficient for realizing the sound effect characteristic selected by the selecting means in accordance with pedal position data output from the pedal, tone signal generating means for generating a tone signal, Conversion means for converting the tone signal generated by the signal generation means according to the coefficient generated by the coefficient generation means.

More specifically, the coefficient generating means has a conversion table in which a predetermined coefficient is stored in order to realize a predetermined sound effect characteristic corresponding to each pedal position data. In this case, the corresponding coefficient is read out from the conversion table and output.

The conversion table is provided in a RAM and can be arbitrarily rewritten by data input means.

Further, the coefficient generating means calculates and outputs a coefficient for each pedal position data according to an arithmetic expression for realizing a predetermined sound effect characteristic.

[0011]

In the present invention, a player specifies a desired characteristic from among a plurality of sound effect characteristics in advance by using a specifying means. When the performance is started and the pedal is depressed, the pedal outputs pedal position data corresponding to the depressed amount. The pedal position data is provided to the coefficient generating means, and the coefficient generating means generates a coefficient for realizing the sound effect characteristic specified by the specifying means according to the pedal position data. The coefficient is provided to the converting means, which converts the tone signal generated by the tone signal generating means in accordance with the coefficient and outputs the converted signal.

Thus, the amount of depression of the pedal and the degree of application of the sound effect match the sound effect characteristics specified by the specifying means. Therefore, the player can appropriately select a predetermined sound effect characteristic from a plurality of sound effect characteristics prepared in advance, so that the player can select a sound effect in which the amount of pedal depression and the degree of the effect conform to the player's sensitivity. It is possible to perform while performing the sound effect as intended.

The coefficient generating means generates a coefficient by referring to, for example, a conversion table. The conversion table is provided in a RAM so that the contents can be arbitrarily rewritten by the data input means. . This makes it possible to create a sound effect characteristic other than the sound effect characteristics prepared in advance, which suits the taste of the player, and adjusts the relationship between the amount of pedal depression and the degree of effect applied to the sensitivity of the player. Can be set to

Further, the coefficient generating means is generated by calculation using an arithmetic expression. In this case, there is no need for a conversion table, so that the memory capacity of the electronic musical instrument can be reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the electronic musical instrument of the present invention will be described in detail with reference to the drawings. The following description focuses on the configuration and operation in the case where a damper pedal is used to exert the damper pedal effect as an example of the sound effect.

FIG. 1 is a block diagram showing a schematic configuration of an electronic musical instrument according to the present invention. A central processing unit (hereinafter, referred to as a “CPU”) 10, which is a main element constituting the electronic musical instrument,
Read-only memory (hereinafter referred to as “ROM”) 11,
Random access memory (hereinafter referred to as "RAM") 1
2. The key scan circuit 16, the tone generator (tone generator) 18, and the digital signal processing circuit 19 are interconnected via a system bus 30.

The CPU 10 controls the entire electronic musical instrument according to a control program stored in the ROM 11. For example, the CPU 10 performs an assigner process for assigning a sounding channel to a key press, an access process for the sound source 18, and the like. Further, the CPU 10 corresponds to a part of the coefficient generating means, and a part of the processing for the event of the damper pedal which is directly related to the feature of the present invention is also performed by the CPU 10.

An operation panel 13, a pedal 14, and a MIDI interface circuit 15 are connected to the CPU 10 through dedicated lines. Details of these will be described later.

The ROM 11 stores a control program for operating the above-described CPU 10 and a CP.
Various fixed data used by U10 for various processes are stored. The contents stored in the ROM 11 are stored in the system bus 3
0 to be accessed by the CPU 10. That is, C
The PU 10 reads out a control program (instruction) from the ROM 11 via the system bus 30, interprets and executes the control program, and reads out predetermined fixed data and uses it for arithmetic processing.

The ROM 11 corresponds to a part of the coefficient generating means, and stores a conversion table for defining characteristics of an acoustic effect directly related to the features of the present invention, for example, a damper pedal effect. FIG. 2 shows an example of the characteristics of the damper pedal effect realized by the conversion table.

In the figure, the characteristic line is an example when the half pedal effect is exhibited. That is, when the stepping amount of the damper pedal is between the position “0” where no step is depressed and the position of D1, “0” is output as a coefficient. When the amount of depression of the damper pedal is in the range from the position D1 to the position D2 (half-pedal state), “α” is output as a coefficient. The amount of depression of the damper pedal is D2
If the position is between the position and the position where all the steps are depressed, "1" is output as a coefficient.

By using such a characteristic line,
Like the conventional electronic musical instrument having the half pedal effect function, three states are created: a state in which the damper pedal is not depressed at all, a state in which the damper pedal is depressed halfway, and a state in which the damper pedal is fully depressed, and a predetermined damper pedal effect is exerted in each state. It has become. In addition, if the boundaries D1 and D2 of the respective states are appropriately selected, the depression amount of the damper pedal for exerting the half-pedal effect can be adjusted to the optimum position. For example, by setting the width between D1 and D2 to be relatively large, even a beginner can easily obtain the half pedal effect.

In the half pedal state, the degree of the optimal damper pedal effect can be set by appropriately determining the magnitude of the coefficient α. In addition,
The characteristic line is an example in which one half-pedal state is formed by dividing the stepping amount of the damper pedal into three steps. However, if it is divided into four steps, two different half-pedal states can be created. In addition, an arbitrary number of half-pedal states can be created by dividing into any number of stages.

The characteristic line shows an example of the characteristic when the degree of the damper pedal effect is changed steplessly in accordance with the amount of depression of the damper pedal. This is because the change of the coefficient with respect to the movement amount of the damper pedal is small in a predetermined range where the depression amount of the damper pedal is small or a large predetermined range,
In a predetermined range where the amount of depression is medium, there is a characteristic that the change of the coefficient with respect to the amount of movement of the damper pedal is large.

By using such characteristics of the damper pedal effect, the damper pedal effect can be largely changed with a small movement of the damper pedal in a range where the depression amount is in the middle range. In other words, the response of the damper pedal is slow in a predetermined range where the amount of depression of the damper pedal is small or large, and the response of the damper pedal becomes sensitive in a predetermined range where the amount of depression is medium. It has become excellent.

Similarly, the characteristic line has characteristics similar to the above-mentioned characteristic line, but makes the response of the pedal more sensitive in a predetermined range where the depression amount is medium. Further, the characteristic line is a curve in which the response of the pedal in a predetermined range in which the depression amount is moderate is reduced.

In order to realize each characteristic of the damper pedal effect, the ROM 11 stores four conversion tables each storing the relationship between pedal position data and a coefficient, corresponding to each characteristic line. Which of the above conversion tables is used to apply the damper pedal effect is managed by a characteristic number stored in the RAM 12 described later (details will be described later).

The above-mentioned characteristic line (1) is, as described later,
The selection is made by a characteristic selection switch on the operation panel 13. Therefore, the player can select and use the characteristic of the damper pedal effect that suits him, and can generate a musical sound having the intended sound effect by operating the pedal in accordance with the sensitivity of the player.

Although the above embodiment has been described with reference to the case where four conversion tables corresponding to the four damper pedal effect characteristics are provided, the number (number of conversion tables) and types of damper pedal effect characteristics prepared in advance are as described above. However, the present invention is not limited to this, and any number or type can be provided.

The RAM 12 temporarily stores various data necessary for executing the control program, and defines, for example, areas such as a data buffer, a register, and a flag. Key data fetched from the keyboard 17 described later, pedal position data fetched from the pedal 14, panel data fetched from the operation panel 13, and the like are also temporarily stored in the RAM 12. This RAM 12
Are accessed by the CPU 10 via the system bus 30.

Operation panel 1 connected to CPU 10
Reference numeral 3 denotes, for example, as shown in FIG. 3, various switches (represented by reference numeral 131) for instructing the electronic musical instrument to perform various operations, and, for example, an LED or the like indicating the on / off state of each switch. (Indicated by reference numeral 132). Each of the switches includes a rhythm selection switch, a timbre selection switch, an effect selection switch, a volume control switch, and the like, as well as a characteristic selection switch 130 directly related to the features of the present invention.

The rhythm selection switch is a switch for selecting a predetermined rhythm for performing an automatic rhythm from a plurality of prepared rhythms. The timbre selection switch is a switch for selecting a timbre to be used for sound generation from various timbres such as a piano, an organ, and a flute. The effect selection switch is a switch for selecting a sound effect such as reverb or chorus to be applied to the musical sound.
The volume control switch is a switch for controlling the volume of a musical tone to be generated.

The characteristic selection switch corresponds to the designating means. The degree of the effect of the damper pedal effect by the damper pedal and the degree of the predetermined sound effect selected by the effect selection switch can be determined by operating the pedal. This is to select the characteristic to be changed.
More specifically, the characteristic lines shown in FIG.
Switch for selecting any one of the following.

The configuration of the operation panel 13 is merely an example, and is not limited to the above configuration. For example, a data input device for inputting numerical values of various parameters to be set in the electronic musical instrument, and an LCD for displaying various messages, the status of the electronic musical instrument, and the like.
, And a function corresponding to the various switches described above can be realized by using them.

The operation panel 13 is connected to the CPU 10 via a panel scan circuit (not shown). The panel scan circuit scans the on / off state of each switch of the operation panel 13 and outputs C as panel data.
Send to PU10. This panel data is stored in the CPU 10
Is stored in the RAM 12 under the control of, and is referred to at a predetermined timing and used for triggering various processes.

The pedal 14 connected to the CPU 10
Is composed of, for example, a foot pedal, and is used to control the degree of application of various music effects. This pedal 1
Reference numeral 4 includes a soft pedal, a sostenuto pedal, and the like, in addition to a damper pedal. Each pedal is provided with a detector (not shown) that can detect the amount of depression. As this detector, for example, a variable resistor, a pressure sensor, an optical sensor, or the like can be used.

The pedal 14 is connected to the CPU 10 via a pedal scan circuit (not shown). The pedal scan circuit scans a detector provided on each of the pedals, detects data indicating the amount of depression (pedal position data), and sends the data to the CPU 10. The pedal position data is stored in the RAM 12 under the control of the CPU 10, and is used to control the degree of the sound effect.

The MIDI interface 15 connected to the CPU 10 is a MIDI interface between the electronic musical instrument and an external device.
This controls the transfer of IDI data. Examples of the external device include a personal computer and a sequencer that process MIDI data.

The keyboard 17 is composed of a plurality of keys for the player to specify the pitch of a musical tone, and key switches which are opened and closed in conjunction with the keys. This keyboard 17 is connected to the key scan circuit 16.

The key scan circuit 16 includes a keyboard 17
The state of the key switch is scanned and output as key data indicating the on / off state of the key. This key data is sent to the CPU 10 via the system bus 30,
It is stored in the RAM 12 under the control of the PU 10.

The key data stored in the RAM 12 is referred to at a predetermined timing, and a key number for specifying a key having an event and a key pressing strength (speed).
Is used to generate touch data indicating The key number and the touch data are further converted into frequency data and envelope data and sent to the sound source 18 as described later, and are used for key press / key release processing accompanying key on / key off.

The sound source 18 corresponds to a tone signal generating means, and includes a plurality of oscillators. Each oscillator of the sound source 18 is created based on the tone data (waveform address created corresponding to the tone number, frequency data created corresponding to the key number, touch data, and pedal position data sent from the CPU 10). And generates digital tone signals in a time-division manner. The digital tone signal generated by the sound source 18 is sent to a digital signal processing circuit 19.

The waveform memory 40 is constituted by, for example, a ROM. The waveform memory 40 stores pulse code modulated (PCM) waveform data.
In order to realize a plurality of tones, the waveform memory 40
A plurality of types of waveform data (specified by tone color numbers) corresponding to each tone color are stored. The waveform data stored in the waveform memory 40 is read by the sound source 18.

The digital signal processing circuit 19 corresponds to the conversion means, and performs a predetermined operation between the digital tone signal sent from the sound source 18 and the coefficient sent from the CPU 10 and outputs the result. It is. For example, a coefficient determined by the amount of depression of a damper pedal and a digital tone signal are calculated to generate a digital tone signal to which a predetermined damper pedal effect is added. The digital tone signal generated by the digital signal processing circuit 19 is supplied to a D / A converter 20.

The D / A converter 20 converts a digital tone signal supplied from the sound source 18 into an analog tone signal. The analog tone signal output from the D / A converter 20 is sent to the amplifier 21.

The amplifier 21 is a well-known amplifier which amplifies an input analog tone signal at a predetermined amplification rate and outputs the amplified signal. The analog tone signal that has been subjected to predetermined amplification by the amplifier 21 is supplied to a speaker 22.

The speaker 22 is of a well-known type for converting an analog musical tone signal as an electric signal into an acoustic signal. With this speaker 22, a sound effect corresponding to the depression amount of the pedal 14 is added to the musical sound corresponding to the pressing of the key of the keyboard 17, and the sound is emitted.

Next, the operation of this embodiment in the above configuration will be described in detail with reference to the flowcharts shown in FIGS. In the following, description will be made mainly on the operation of giving the damper pedal effect by depressing the damper pedal.

FIG. 4 is a main flowchart showing the processing of the electronic musical instrument according to the present invention, which is started when the power is turned on. That is, when the power is turned on, first, the CPU 10,
Initialization processing of the RAM 12, the sound source 18, and the like is performed (step S10). In this initialization process, a process of clearing registers and flags in the CPU 10, a process of setting initial values for various buffers, registers, flags, and the like defined in the RAM 12, and setting of initial values in the sound source 18 to generate unnecessary sounds. For example, a process for preventing such a situation is performed.

Next, a panel event process is performed (step S11). In the panel event processing, processing corresponding to the operation of various switches on the operation panel 13 is performed. Details of the panel event process are shown in the flowchart of FIG.

In the panel event process, first, the presence or absence of a switch event is checked (step S20). That is, by scanning the operation panel 13, panel data indicating the setting state of each switch is read as a bit string corresponding to each switch (this is referred to as "new panel data"). Next, the panel data read in the same manner as the previous time (this is called "old panel data"
M12) and the new panel data, and a panel event map with different bits turned on is created.

The determination of the presence or absence of a switch event is made by examining the panel event map. That is, if there is no ON bit in the panel event map, it is recognized that there is no switch event, and the process returns from the panel event processing routine and returns to the main routine.

On the other hand, if there is an ON bit in the panel event map, it is recognized that a switch event has occurred, and then it is checked whether or not the characteristic selection switch is an ON event (step S21). ). This is done by checking whether the bit corresponding to the characteristic selection switch in the panel event map is on and whether the bit corresponding to the characteristic selection switch in the new panel data is on. Will be

Here, when it is determined that the event is the ON event of the characteristic selection switch, a process of storing the characteristic number is performed (step S22). That is, the number corresponding to the pressed switch among the characteristic selection switches is stored in the RAM 12.
Is stored in a predetermined area. This characteristic number is referred to when calculating a coefficient for providing a sound effect (damper pedal effect) in a pedal event process described later.

If the characteristic number storage processing is completed or if it is determined in step S21 that the event is not an ON event of the characteristic selection switch, then "other switch processing" is performed (step S23). The "other switch processing" is processing for events such as a rhythm selection switch, a tone color selection switch, an effect selection switch, and a volume control switch. The content of the processing corresponding to each switch is not directly related to the present invention, and therefore, the description is omitted. Thereafter, the process returns from the panel event processing routine and returns to the main routine.

Next, in the main routine, a pedal event process is performed (step S12). In this pedal event process, a process corresponding to the operation of each of the pedals 14 (damper pedal, soft pedal, sostenuto pedal) is performed. Details of the pedal event process are shown in the flowchart of FIG.

In the pedal event process, first, the presence or absence of a pedal event is checked (step S30). That is,
By scanning the pedal 14, pedal position data (data of a predetermined bit width) indicating the depression amount of each pedal is read for each pedal (this is referred to as "new pedal position data"). Next, the pedal position data read in the same manner as the previous time (this data is referred to as "old pedal position data" and has already been stored in the RAM 12) and the new pedal position data are compared for each pedal, and different pedal positions are obtained. When data is found, a pedal event map is created in which a bit indicating a pedal corresponding to the pedal position data is turned on.

The judgment of the presence or absence of the pedal event is as follows.
This is performed by examining the pedal event map. That is, if there is no ON bit in the pedal event map, it is recognized that there is no pedal event, and the routine returns from the present pedal event processing routine and returns to the main routine.

On the other hand, if there is a bit that is ON in the pedal event map, it is recognized that there is a pedal event, and then it is checked whether or not the pedal having the event is a damper pedal (step). S3
1). This is performed by checking whether the bit corresponding to the damper pedal in the pedal event map is on.

If it is determined that the event is a damper pedal event, a coefficient relating to the damper pedal effect is calculated and set in the digital signal processing circuit 19 (step S32). That is, the conversion table in the ROM 11 corresponding to the characteristic number stored in the predetermined area of the RAM 12 is selected by the characteristic selection switch of the operation panel 13, and then the new pedal position is referred to by referring to the selected conversion table. The coefficient corresponding to the data is read. Then, the read coefficients are sent to the digital signal processing circuit 19.

Thus, in the digital signal processing circuit 19, the digital tone signal generated by the sound source 18 and the above coefficient are calculated, and a digital tone signal with a predetermined damper pedal effect is output.

If the process of setting this coefficient in the digital signal processing circuit 19 is completed or if it is determined in step S31 that the event is not a damper pedal event, then,
Other pedal processing is performed (step S33). This “other pedal processing” is soft pedal processing or sostenuto processing for a soft pedal or sostenuto pedal event.

The soft pedal process is a process in which, when a soft pedal in the pedal 14 is depressed, the sound is softened by controlling the envelope, for example, and changing the timbre. In the sostenuto pedal processing, when a sostenuto pedal in the pedal 14 is depressed, the same processing as the above-described damper pedal processing is performed on a musical tone corresponding to a pressed key. Since each of these processes is not directly related to the present invention, a detailed description is omitted. Thereafter, the routine returns from the pedal event processing routine and returns to the main routine.

In the main routine, a keyboard event process is performed (step S13). In this keyboard event processing, processing corresponding to operation of each key of the keyboard 17 is performed. The details of this keyboard event processing are shown in FIG.
Is shown in the flowchart of FIG.

In the keyboard event processing, first, the presence or absence of a key-on event is checked (step S40). That is,
By scanning the keyboard 17 via the key scan circuit 16, key data indicating the on / off state of each key is read as a bit string corresponding to each key (this is referred to as "new key data").

Next, the key data read in the same manner as the previous time (this is called "old key data"
Is compared with the new key data to determine whether or not there is a different bit. If there is a different bit, it recognizes that a key event has occurred, and creates an event map in which the bit corresponding to the changed key is set on.

The determination of the presence / absence of a key event is made by examining the key event map. That is, if there is no ON bit in the key event map, it is recognized that there is no key event, and the process returns from the keyboard event processing routine and returns to the main routine.

On the other hand, if there is an ON bit in the key event map, it is recognized that a key event has occurred, and then it is checked whether or not the event is a key ON event (step S41). This is performed by checking whether or not a bit in the new key data corresponding to an on bit in the key event map is on.

Here, if it is determined that the event is an ON event, a process of setting musical tone data to the sound source 18 is performed (step S42). Specifically, one of the sound sources 18
One oscillator is selected by a predetermined algorithm,
Tone data is sent from the CPU 10 to the selected oscillator. The selection of the oscillator, that is, the process of assigning the sound channel is a well-known technique, and a description thereof will be omitted.

Here, the tone data set in the oscillator is a waveform address, frequency data, envelope data and the like as described above. The waveform address is an address on the waveform memory 40 where the waveform data corresponding to the tone number is stored. The frequency data is data corresponding to the key number, and defines the speed at which waveform data is read from the waveform memory 40. The envelope data specifies the shape of the envelope to be added to the tone waveform based on the touch data and the state of the damper pedal.

The waveform address and frequency data are set in the sound source 18 and are used to read out the waveform data in the waveform memory 40 specified by the waveform address at a speed corresponding to the frequency data. Envelope data is also set in the sound source 18 and used to generate an envelope to be added to the synthesized musical sound waveform.

Next, a key pressing process is performed (step S).
43). The key depressing process is a process of generating a tone signal by activating the oscillator based on the tone data set in the sound source 18 in step S42. As a result, generation of a digital musical tone signal to which an envelope has been added is started. The digital tone signals generated by the sound source 18 are sequentially sent to a digital signal processing circuit 19.

If the damper pedal is not depressed, the digital signal processing circuit 19 does not perform any processing on the digital musical tone signal given from the sound source 18 because the initial value "0" remains set as a coefficient. Output as is. Therefore, the digital tone signal is converted by the D / A converter 2
0, and a normal tone having no damper pedal effect is generated.

On the other hand, when the damper pedal is depressed, the coefficient corresponding to the depressed amount is sequentially set.
The digital tone signal given from 8 is subjected to processing such as multiplication by the above-mentioned coefficient, and is output. Therefore, this digital musical tone signal is supplied to the D / A converter 20, and a musical tone to which a damper pedal effect according to the depression amount of the damper pedal is given is generated.

If it is determined in step S41 that the event is not an ON event, it is recognized that the event is an OFF event.
A key release process is performed (step S44). This key release process is a process of stopping the sound generation corresponding to the released key of the keyboard 17 when the damper pedal is not depressed. This is realized by sending predetermined data to the sound source 18 to reduce the envelope of the musical tone being sounded.

On the other hand, when the damper pedal is depressed, the process of immediately stopping sound generation is not performed. Therefore,
Even if the key is released while the damper pedal is depressed, the above-mentioned musical tone continues to be generated for a time corresponding to the amount of depression of the damper pedal. Thereby, the original function of the damper pedal, that is, the time until the sound is muted, is extended. Thereafter, the process returns from the key event processing routine and returns to the main routine.

When the keyboard event processing is completed, "other processing" is performed (step S14).
In this “other processing”, for example, MIDI data transmission / reception processing is performed via the MIDI interface circuit 15. Thereafter, the process returns to step S11, and the same processing is repeated thereafter.

When an event corresponding to a panel operation, a keyboard operation, or a pedal operation occurs in the process of repeatedly executing steps S11 to S14, various functions of the electronic musical instrument are realized by performing processing corresponding to the event. .

As described above, in the present embodiment, the player designates a desired characteristic from among a plurality of damper pedal effect characteristics in advance by using the characteristic selection switch on the operation panel 13. As a result, the conversion table provided in the ROM 11 for determining the damper pedal effect characteristics is specified. When the performance is started and the damper pedal is depressed, the damper pedal outputs pedal position data corresponding to the depressed amount.

Then, using the pedal position data, the conversion table is referred to, and a coefficient corresponding to the pedal position data is read. The read coefficients are provided to the digital signal processing circuit 19. The digital signal processing circuit 19 calculates a digital musical tone signal generated by the sound source 18 and the above-described coefficient to generate a digital musical tone signal to which a damper pedal effect according to the amount of depression of the damper pedal is added.

As a result, the amount of depression of the damper pedal and the degree of application of the damper pedal effect conform to the previously specified damper pedal effect characteristics. in this way,
By appropriately selecting a predetermined characteristic from a plurality of damper pedal effect characteristics prepared in advance, the player can select a damper pedal depression amount and a degree of application of the damper pedal effect that match the sensitivity of the player. You can perform as you did.

In the above embodiment, the case where the damper pedal effect is generated by giving the digital signal processing circuit 19 a predetermined coefficient generated in response to the operation of the damper pedal has been described. Can be similarly applied. Also,
In the above embodiment, the case where the damper pedal effect is controlled has been described. However, other sound effects such as the reverb depth and the delay time can be controlled by pedal operation.

The sound source 18 may be provided with a predetermined coefficient generated in response to the operation of the pedal to control a predetermined sound effect, for example, a modulation depth. In this case, the degree of application of the sound effect is controlled by processing the digital tone signal inside the sound source 18.

In the above embodiment, the conversion table is
Although the case where the conversion table is provided in the OM 11 has been described, the conversion table may be provided in the RAM 12. In this case, basic sound effect characteristics are provided in the ROM 11,
For example, this is copied to the RAM 12 at initialization, and
2 is controlled so as to exhibit the sound effect characteristic using the conversion table on the upper side.

If the contents of the conversion table in the RAM 12 can be changed using the operation panel 13 as data input means, the basic sound effect characteristics can be changed to the sound effect characteristics suitable for the performer's preference. Can be changed. Of course, it is also possible to completely change the conversion table and create a new acoustic effect characteristic.

According to such a configuration, it is possible to create a sound effect characteristic other than the sound effect characteristic prepared in advance, which suits the taste of the player, and to determine the relationship between the pedal depression amount and the degree of effect application. Can be set to match the sensitivity of

In the above embodiment, the ROM 11 or the R
Although the desired acoustic effect characteristics are obtained by using the conversion table provided in the AM 12, the acoustic effect characteristics may be obtained by calculation using a predetermined arithmetic expression. According to this configuration, there is no need to provide a conversion table, and there is an advantage that the memory capacity can be reduced.

Further, in the above embodiment, a predetermined sound effect is obtained by calculating a predetermined coefficient for one digital musical tone signal output from the sound source 18. For example, as shown in FIG. 8, a sound source has a plurality of oscillators (DCOs), generates a digital tone signal for each frequency component (for example, each component of a high band, a middle band, and a low band) and synthesizes them. In many cases, a more complex tone is obtained by using one digital tone signal.

In the electronic musical instrument having such a configuration, for example, for each output (DCO1 to DCO3) of each oscillator, a sound effect characteristic is added by the digital signal processing circuit 19, and then these are added by the adder 50, for example. By synthesizing one digital musical tone signal, converting the digital musical tone signal by the D / A converter 20 and applying it to the speaker, a musical tone to which a predetermined acoustic effect is added can be generated.

According to this configuration, for example, it is possible to add an acoustic effect having different characteristics for each frequency component.
More precise control of the sound effect becomes possible, and a performance that matches the sensitivity of the player can be performed.

[0091]

As described above in detail, according to the present invention, it is possible to provide an electronic musical instrument capable of easily obtaining a sound effect intended by a player by operating a predetermined pedal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of an electronic musical instrument according to the present invention.

FIG. 2 is a diagram for explaining sound effect characteristics and a conversion table of the electronic musical instrument according to the present invention.

FIG. 3 is a diagram showing an example of an operation panel of the embodiment of the electronic musical instrument according to the present invention.

FIG. 4 is a flowchart (main routine) showing the operation of the embodiment of the present invention.

FIG. 5 is a flowchart (panel event processing routine) illustrating the operation of the embodiment of the present invention.

FIG. 6 is a flowchart (pedal event processing routine) showing the operation of the embodiment of the present invention.

FIG. 7 is a flowchart (keyboard event processing routine) illustrating the operation of the embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 CPU 11 ROM 12 RAM 13 Operation panel 14 Pedal 15 MIDI interface circuit 16 Key scan circuit 17 Keyboard 18 Sound source 19 Digital signal processing circuit 20 D / A converter 21 Amplifier 22 Speaker 30 System bus 40 Waveform memory 50 Adder

Continuation of the front page (56) References JP-A-1-101590 (JP, A) JP-A-4-212995 (JP, A) JP-A-2-296296 (JP, A) JP-A-60-262194 (JP) , A) Japanese Patent Publication No. 64-8838 (JP, B2)

Claims (4)

(57) [Claims] 1. A pedal for outputting pedal position data according to a depression amount, and silencing at a time corresponding to pedal position data from the pedal.
And tone signal generating means for generating a comfortable sound signal that, to correspond to the pedal position data and the pedal position data
It defines the relation between that factor, designating means for designating one of a plurality of damper pedal effects properties, according to the damper pedal effect characteristic designated by said designating means, for applying a damper pedal effect according to the prior Kipe Dal position data a coefficient generating means for the coefficients occur, and engaging number generated by the easy sound signal generated by the tone signal generating means and the coefficient generating means and computation, imparting damper pedal effect to musical sound signal Te than An electronic musical instrument comprising: 2. The apparatus according to claim 1, wherein said coefficient generating means has a conversion table in which coefficients for forming said plurality of damper pedal effect characteristics are stored in correspondence with said pedal position data. 2. The electronic musical instrument according to claim 1, wherein a corresponding coefficient is read from the conversion table and output. 3. The electronic musical instrument according to claim 2, wherein the conversion table is provided in a RAM and can be arbitrarily rewritten by data input means. 4. The electronic musical instrument according to claim 1, wherein the coefficient generating means calculates and outputs coefficients for forming the plurality of damper pedal effect characteristics according to an arithmetic expression.