JPH10319963A - Electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To create atmosphere approximate to the atmosphere of a natural musical instrument by detecting the presence or absence of treading of a pedal and generating a pedal tone when the treading of the pedal is detected, thereby faithfully simulating the tone meeting a pedal operation. SOLUTION: The pedal 16 is provided with a speed detecting mechanism 15. This speed detecting mechanism 15 comprises two pieces of switches which make and break cooperatively with the treading of the pedal 16 and make and break at the different amts. of treading, i.e., a first switch and a second switch. A CPU 10 measures the time after the turning on of the first switch before the turning on of the second switch and calculates the treading speed of the pedal 16 in accordance with the result of the measurement. The pedal 16 is adapted to generate the pedal tone according to the speed of the treading when the pedal is treaded, therefor, the tone of the natural musical instrument like that of an acoustic piano is eventually more strictly simulated. Then, the atmosphere near that of the natural musical instrument may be created.

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 having a pedal, and more particularly to a technique for generating a musical effect similar to a pedal operation of a natural musical instrument.

[0002]

2. Description of the Related Art Conventionally, an electronic piano has been known as one of electronic musical instruments. This electronic piano is primarily manufactured for the purpose of faithfully simulating an acoustic piano which is a natural musical instrument. Therefore, in recent years, efforts have been made to imitate not only the tone generated by keying but also the sound (click sound) of the key colliding with the shelf board at the time of keying, so as to approach the tone of an acoustic piano.

[0003] An acoustic piano has pedals such as a damper pedal and a soft pedal, and when these pedals are depressed, a predetermined musical effect is generated. For example, when the damper pedal is depressed, the sound is elongated and a rich reverberation is generated. Also, when the soft pedal is depressed, the volume decreases and the sound becomes softer. Therefore, a conventional electronic piano is configured so as to simulate the function of the pedal of such an acoustic piano, and to obtain a music effect similar to that of an acoustic piano.

[0004] Electronic musical instruments having a pedal include:
Not only electronic pianos but also electronic keyboards and synthesizers have been developed. These electronic musical instruments have a function of generating sounds with a large number of timbres, and can generate sounds with the timbres of acoustic pianos. In addition, the function of the pedal of an acoustic piano can be simulated.

[0005]

By the way, in an electronic piano having a conventional pedal, for example, when a damper pedal is depressed, a release time of a sound generated by a keystroke becomes longer and a reverberation sound increases. Is controlled. In addition, when the soft pedal is depressed, control is performed so that the volume of the sound generated by the keystroke decreases and the reverberation sound decreases. As described above, when the pedal is depressed with the conventional electronic piano, a sound corresponding to the original function of the pedal is generated.

[0006] However, when the pedal of the acoustic piano is depressed, not only a sound corresponding to the original function of the pedal but also a specific sound generated when the pedal is depressed is generated. For example, if the damper pedal is depressed without playing the keyboard, a rubbing sound of the string and the damper and a mechanical sound generated by the operation of the pedal mechanism are generated.
In a conventional electronic piano, a peculiar sound generated by pressing such a pedal is ignored because it is not a musical sound.

However, the sound peculiar to the pedal cannot be ignored when trying to simulate the sound of an acoustic piano with an electronic piano. In other words, it is expected that a sound closer to that of an acoustic piano can be obtained if the sound peculiar to the pedal is also generated by an electronic piano.

Accordingly, an object of the present invention is to provide an electronic musical instrument capable of producing an atmosphere close to a natural musical instrument by faithfully simulating a sound corresponding to a pedal operation.

[0009]

In order to achieve the above object, an electronic musical instrument according to a first aspect of the present invention comprises a pedal,
It is provided with detection means for detecting whether or not the pedal is depressed, and pedal sound generation means for generating a pedal sound when the detection means detects that the pedal is depressed.

In this electronic musical instrument, for example, a damper pedal, a soft pedal, a sostenuto pedal, or the like can be used as the pedal. The pedal can be configured to include a switch that is turned on when a predetermined depression amount is applied, and that is turned off otherwise.

The detecting means detects the presence or absence of the depression amount of the pedal by checking whether the switch is on or off. The pedal sound generating means generates a pedal sound when the detecting means detects that the pedal is depressed, that is, when it is detected that the switch is turned on. Here, the pedal sound is a mechanical sound generated when a pedal is depressed without playing the keyboard. Taking the damper pedal as an example, the sound refers to a sound generated when the string and the damper are rubbed when the damper pedal is depressed, a mechanical sound generated when the damper pedal mechanism operates, and the like.

The pedal sound generating means includes a waveform memory for storing waveform data of the pedal sound, and reads out the pedal sound waveform data from the waveform memory when the detecting means detects that the pedal is depressed. , A pedal sound can be generated based on the read waveform data.

The waveform data of the pedal sound stored in the waveform memory is generated by, for example, collecting a sound when the pedal is depressed without playing the keyboard on an acoustic piano, and performing pulse code modulation (PCM) on the sound. it can. The waveform data is not limited to PCM, but can be created using, for example, DPCM, ADPCM, and various other encoding techniques.

The pedal sound generating means stores the waveform data of the pedal sound for each type of pedal, such as a damper pedal, a soft pedal, a sostenuto pedal, etc. in a waveform memory. The corresponding waveform data may be read to generate a pedal sound. According to this configuration, a more realistic pedal sound can be generated.

According to this electronic musical instrument, when the pedal is depressed, a mechanical pedal sound is generated in accordance with the depressing operation. This pedal sound is generated depending on whether or not the keyboard is pressed. Therefore, for example, the sound of a natural musical instrument such as an acoustic piano is more closely simulated, and an atmosphere close to that of a natural musical instrument can be obtained.

In order to achieve the above object, an electronic musical instrument according to a second aspect of the present invention comprises a pedal, detecting means for detecting a depressed state of the pedal, and a depressed state detected by the detecting means. And a pedal sound generating means for generating a different pedal sound according to

In this electronic musical instrument, for example, a damper pedal, a soft pedal, a sostenuto pedal, or the like can be used as the pedal. The pedal can be provided with a mechanism for detecting a depression state. Here, the stepping speed or the stepping amount can be used as the stepping state.

When the stepping speed is used as the stepping state, the detecting means may be constituted by a speed detecting mechanism. More specifically, this speed detection mechanism includes two switches that open and close in conjunction with the depression of the pedal and open and close with different depression amounts, and detects the depression speed based on the on / off time difference of each switch. Can be configured.

When the depression amount is used as the depression state, the detection means can be constituted by a volume mechanism. More specifically, the volume mechanism can be configured to use a volume that exhibits a different resistance value by rotating according to the amount of depression of the pedal, and to detect the amount of depression by a signal from this volume.

The pedal sound generating means generates different pedal sounds according to the stepping speed or the stepping amount when the detecting means detects the stepping speed or the stepping amount of the pedal. With this configuration, it is possible to simulate a delicate difference in pedal sound depending on the pedal depression speed or the pedal depression amount, so that an atmosphere closer to a natural musical instrument can be obtained.

The pedal sound generating means includes a waveform memory for storing waveform data of a plurality of pedal sounds according to the depression state of the pedal, and stores the waveform data of the pedal sound corresponding to the depression state detected by the detection means. It can be configured to read from the waveform memory and generate a pedal sound based on the read waveform data.

In this case as well, similarly to the electronic musical instrument according to the first aspect of the present invention, various types of waveform data can be stored in the waveform memory. Can be prepared.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electronic musical instrument according to the present invention will be described below in detail with reference to the drawings. In addition,
Hereinafter, a case where a speed detection mechanism is used as the detection means will be described.

FIG. 1 is a block diagram showing the configuration of the electronic musical instrument of the present invention. In this electronic musical instrument, a central processing unit (hereinafter, referred to as “CPU”) 10, a program memory 11, a work memory 12, a panel interface circuit 1
3. The keyboard interface circuit 17 and the tone generator circuit 19 are interconnected by a bus 30. The bus 30 is constituted by signal lines for transmitting, for example, address signals, data signals, control signals, and the like, and is used for transmitting and receiving data between the above-described elements.

The CPU 10 performs processing for realizing various functions that the electronic musical instrument should have according to the control program stored in the program memory 11. For example,
The CPU 10 performs keyboard processing according to keyboard operations, panel processing according to panel operations, pedal processing according to pedal operations,
Perform other processing.

The program memory 11 can be composed of, for example, a read-only memory (hereinafter referred to as “ROM”). The program memory 11 stores various fixed data used by the CPU 10, timbre parameters for specifying timbres, and the like, in addition to the control program described above.

The timbre parameters are provided for each of a plurality of musical ranges, for example, for each of a plurality of instrument sounds. As tone color parameters particularly related to the present invention, tone color parameters corresponding to pedal sounds of a damper pedal, a soft pedal, and a sostenuto pedal are prepared corresponding to a plurality of depression speeds of each pedal. Each tone color parameter includes, for example, a waveform address, frequency data, envelope data, a filter coefficient, and the like.

The work memory 12 can be constituted by, for example, a random access memory (hereinafter, referred to as "RAM"). The work memory 12 temporarily stores various data processed by the CPU 10. The work memory 12 is provided with, for example, various tables, buffers, registers, counters, flags, and the like. These details will be described below as necessary.

An operation panel 14 and a speed detecting mechanism are connected to the panel interface circuit 13. A pedal 16 is further attached to the speed detection mechanism 15.

The operation panel 14 is provided with, for example, various switches (not shown), numerical input devices, indicators, display devices, and the like. The various switches include, for example, a mode setting switch, a tone selection switch, an effect selection switch, and the like. The numerical value input device is used for inputting various numerical values, and can be constituted by, for example, an up / down switch, a jog dial, a numeric keypad, or the like. The display device is used to display various messages. As the display device, for example, an LCD display device, an LED display device, a CRT display device, and various other display devices capable of displaying characters can be used.

The pedal 16 includes a damper pedal, a soft pedal, and a sostenuto pedal. Each pedal is provided with a speed detection mechanism 15. The speed detection mechanism 15 includes, for each pedal, two switches that open and close in conjunction with the depression of the pedal and open and close with different depression amounts, that is, a first switch and a second switch. When the pedal is depressed, the first switch is turned on first, and then the second switch is turned on. A signal indicating ON / OFF of each switch is sent to the CPU via the panel interface circuit 13 as pedal data.
Sent to 10. The CPU 10 measures the time from when the first switch is turned on to when the second switch is turned on, and calculates the pedal depression speed based on the measurement result. The first switch and the second switch may be mechanical switches or optical switches.

The panel interface circuit 13 controls transmission and reception of data between the operation panel 14 and the speed detection mechanism 15 and the CPU 10. That is, the panel interface circuit 13 generates panel data based on the signal received from the operation panel 14 and sends the panel data to the CPU 10. This panel data is composed of switch data and dial data. The switch data is composed of a bit string in which each switch corresponds to one bit. The dial data is composed of numerical data input by a numerical input device. The CPU 10 performs various processes according to the panel operation based on the panel data. The panel interface circuit 13 sends out the display data received from the CPU 10 to the operation panel 14. Thereby, display of data on the display device of the operation panel 14, control of turning on / off of various indicators, and the like are performed.

Further, the panel interface circuit 13 comprises:
It receives a switch signal from the speed detection mechanism 15, generates pedal data based on the switch signal, and sends it to the CPU 10. The pedal data is composed of a bit string in which each pedal corresponds to one bit.

A keyboard device 18 is connected to the keyboard interface circuit 17. The keyboard device 18 has a plurality of keys for instructing sound on / off. This keyboard device 1
8 uses, for example, a two-contact key. That is, each key of the keyboard device 18 has two key switches that open and close in response to key press or key release, and can detect a key touch based on a time difference between on / off of each key switch. I have.

The keyboard interface circuit 17 detects the on / off state of each key and the strength of key touch in response to key press or key release. That is, the keyboard interface circuit 17 generates key data indicating the on / off state of each key and touch data indicating the strength of key touch based on the signal received from the keyboard device 18 and sends them to the CPU 10. The CPU 10 performs sound generation or mute processing corresponding to key press or key release based on the key data and the touch data.

A waveform memory 191 and a D / A converter 192 are connected to the tone generator 19. Waveform memory 19
1 stores waveform data, for example, a ROM
It consists of. The waveform memory 191 stores a plurality of waveform data corresponding to each of a plurality of tone color parameters. The waveform data is obtained, for example, by converting a emitted musical tone into an electric signal, and converting this into a pulse code modulation (PCM)
Can be created. The pedal sound waveform data
The pedal 16 is depressed without playing the keyboard, and is created based on the sound generated at this time. In this case, each pedal is depressed a plurality of times at different speeds, and waveform data is created for each depressing speed. This waveform memory 191 is accessed by the tone generator 19.

The tone generator 19 can be composed of, for example, a digital signal processor (DSP). This tone generator circuit 19 has a plurality of sound channels,
A tone signal is generated according to an instruction from the PU 10. That is, when the tone generator 19 receives the data specifying the sound channel and the timbre parameter from the CPU 10, the tone generator 19 activates the specified sound channel. The activated tone generation channel reads out waveform data corresponding to the timbre parameter from the waveform memory 191 and adds an envelope to the waveform data to generate a digital tone signal.
Transmitted to the converter 192.

The D / A converter 192 converts the input digital tone signal into an analog tone signal. This D / A
The output from converter 192 is provided to amplifier 193. The amplifier 193 amplifies the input musical tone signal and sends it to the speaker 194. The speaker 194 is an amplifier 193
Is converted into a sound signal and output. Thus, a musical sound is generated from the speaker 194.

Next, the operation of the electronic musical instrument according to the embodiment of the present invention in the above configuration will be described with reference to the flowcharts of FIGS.

FIG. 2 is a flowchart showing the main processing of the electronic musical instrument. This main processing routine is started when the power is turned on. That is, when the power is turned on,
First, an initialization process is performed (step S10). In this initialization process, the inside of the CPU 10 is reset, and buffers, registers, counters, flags, and the like defined in the work memory 12 are set to an initial state.

When the initialization process is completed, a panel process is performed (step S11). In the panel processing, first, the operation panel 14 is scanned. As a result, the operation panel 14 allows the panel interface circuit 13
The panel data is read via. The switch data in the panel data (hereinafter referred to as “new switch data”) and the switch data read from the operation panel 14 in the previous panel processing and already stored in a predetermined area of the work memory 12 are stored. (Hereinafter referred to as “old switch data”). This calculation result is stored in a predetermined area of the work memory 12 as a panel event map. After that, the new switch data is used as the old switch data in the work memory 1
2 in a predetermined area.

Next, it is checked whether or not each switch has an ON event. This is performed by checking whether both the bit corresponding to the switch in the panel event map and the bit corresponding to the switch in the new switch data are on.

Here, when it is determined that there is an ON event of the switch, a process corresponding to the switch is performed. For example, if the mode setting switch is an on event, a process for changing the mode is performed, and if the mode selection switch is an on event, a process for selecting a timbre is performed. In these processes, a process of displaying characters and the like on a display device and a process of turning on / off an indicator (not shown) are performed as necessary.

When it is determined that there is an event of the numerical value input device, a predetermined numerical value is input according to the mode set at that time. For example, when the electronic musical instrument is set to the timbre selection mode, the numerical value input by the numerical value input device is stored as the timbre number. As a result, a new timbre is determined. In this case, the input timbre number is displayed on the display device.

When the above panel processing is completed,
Keyboard processing is performed (step S12). In this keyboard processing, sound generation processing, mute processing, and the like are performed. Thereby, a musical tone corresponding to the operation of the keyboard device 18 is generated.

Next, pedal processing is performed (step S13). In this pedal process, a process for generating a pedal sound when the pedal 16 is depressed is performed. The details of the pedal process will be described later.

Next, "other processing" is performed (step S14). In this “other processing”, for example, an external M
Processing for transmitting and receiving MIDI data to and from the IDI device is performed. Thereafter, the process returns to step S11, and the same processing is repeated thereafter.

As described above, when the panel operation or the keyboard operation is performed in the process of repeatedly executing steps S11 to S14 of the main processing routine, the processing corresponding to the operation is performed. Thereby, various functions as an electronic musical instrument are realized.

Next, details of the pedal processing will be described with reference to the flowchart of FIG. This pedal processing routine is called at regular intervals from the main processing routine.

In the pedal process, first, a pedal scan process is performed (step S20). In this pedal scan processing, pedal data is read from the speed detection mechanism 15 via the panel interface circuit 13. The pedal data (hereinafter referred to as “new pedal data”) and the speed detection mechanism 15
, And stored in a predetermined area of the work memory 12 (hereinafter referred to as “old pedal data”).
Exclusive OR operation is performed. This calculation result is stored in the work memory 12 as a pedal event map.
Is stored in a predetermined area. Thereafter, the new pedal data is stored in a predetermined area of the work memory 12 as old pedal data.

Next, it is checked whether or not there is a pedal event (step S21). This is done by checking if the pedal event map is zero. Incidentally, the fact that the pedal event map is zero indicates that the state of the pedal 16 has not changed since the previous pedal scan. This step S21
If it is determined that there is no pedal event, the sequence returns from the pedal processing routine to the main processing routine.

On the other hand, if it is determined in step S21 that there is a pedal event, then it is checked whether the event is an ON event of the first switch of the damper pedal (step S22). This is performed by checking whether the bits corresponding to the first switch of the damper pedal in the pedal event map and the new pedal data are both "1".

In step S22, the first damper pedal is released.
If it is determined that the event is a switch ON event, the damper pedal timer is cleared (step S23).
The damper pedal timer is a timer provided in the work memory 12 and counts up at regular intervals in response to a timer interrupt signal (not shown). Thereafter, the sequence returns from the pedal processing routine to the main processing routine. Thus, the measurement of the stepping speed of the damper pedal is started.

In the above step S22, the first operation of the damper pedal is performed.
If it is determined that the event is not the switch on event, then it is checked whether or not there is an on event of the second switch of the damper pedal (step S24). this is,
The bits corresponding to the second switch of the damper pedal in the pedal event map and the new pedal data are both "1".
This is done by checking if

In step S24, the second operation of the damper pedal is performed.
If it is determined that the event is a switch ON event, a speed calculation process is performed (step S25). That is, the value set in the damper pedal timer at that time is converted into a speed value. Next, a sound generation process is performed (step S26). In this sound generation processing, first, a predetermined sound generation channel of the tone generator 19 is allocated for sound generation. Then, a tone color parameter corresponding to the speed value obtained by the speed calculation process is read from the program memory 11 and sent to the assigned tone generation channel. As a result, a digital tone signal based on the tone color parameter is generated in the assigned tone generation channel, and is sequentially transmitted to the D / A converter 192, the amplifier 193, and the speaker 194. As a result, a pedal sound of the damper pedal is generated according to the depressing speed of the damper pedal.

Next, a damper process is performed (step S27). This process is to increase the release time of the sound to be generated and the sound that is already being generated. More specifically, the target phase of the release phase of the envelope data included in the timbre parameter sent from the CPU 10 to the tone generator 19 is changed to be longer, and the release phase of the envelope data already used for sound generation is changed. Is performed so as to increase the target arrival time. Thereafter, the sequence returns from the pedal processing routine to the main routine.

In step S24, the second operation of the damper pedal is performed.
If it is determined that the event is not the switch ON event, then it is checked whether the event is the ON event of the first switch of the soft pedal (step S28). this is,
Bits corresponding to the first switch of the soft pedal in the pedal event map and the new pedal data are both "1".
This is done by checking if

If it is determined that the event is the ON event of the first switch of the soft pedal, the soft pedal timer is cleared (step S29). The soft pedal timer is a timer provided in the work memory 12,
It is counted up at regular intervals according to a timer interrupt signal (not shown). Thereafter, the sequence returns from the pedal processing routine to the main processing routine. Thus, the measurement of the depressing speed of the soft pedal is started.

In step S28, the first soft pedal is released.
If it is determined that the event is not a switch on event, then it is checked whether there is an on event of the second switch of the soft pedal (step S30). this is,
The bits corresponding to the second switch of the soft pedal in the pedal event map and the new pedal data are both "1".
This is done by checking if

In step S30, the second soft pedal
If it is determined that the event is a switch ON event, a speed calculation process is performed (step S31). That is, the value set in the soft pedal timer at that time is converted into a speed value. Next, a sound generation process is performed (step S32). In this sound generation process, the above-described step S2
6 is performed in the same procedure. As a result, a pedal sound of the soft pedal is generated according to the depressing speed of the soft pedal.

Next, software processing is performed (step S33). This process is a process for reducing the volume of the sound to be generated. Specifically, the CPU 10 sends the sound source circuit 1
When the timbre parameter is sent to 9, a process of lowering the target level of all phases of the envelope data included in the timbre parameter is performed. Thereafter, the sequence returns from the pedal processing routine to the main routine.

In step S30, the second soft pedal
If it is determined that the event is not a switch ON event, then it is checked whether there is an ON event of the first switch of the sostenuto pedal (step S34). This is performed by checking whether the bits corresponding to the first switch of the sostenuto pedal in the pedal event map and the new pedal data are both "1".

When it is determined that the event is the ON event of the first switch of the sostenuto pedal, the sostenuto pedal timer is cleared (step S35). The sostenuto pedal timer is a timer provided in the work memory 12 and counts up at regular intervals according to a timer interrupt signal (not shown). Thereafter, the sequence returns from the pedal processing routine to the main processing routine. Thus, the measurement of the depressing speed of the sostenuto pedal is started.

If it is determined in step S34 that the event is not the ON event of the first switch of the sostenuto pedal, then it is checked whether there is an ON event of the second switch of the sostenuto pedal (step S3).
6). This is performed by checking whether the bits corresponding to the second switch of the sostenuto pedal in the pedal event map and the new pedal data are both “1”.

If it is determined in step S36 that the event is the ON event of the second switch of the sostenuto pedal, a speed calculation process is performed (step S37). That is, the value set in the sostenuto pedal timer at that time is converted into a speed value. Next, a sound generation process is performed (step S38). This sound generation processing is performed in the same procedure as the processing in step S26 described above. As a result, a pedal sound of the sostenuto pedal is generated according to the depressing speed of the sostenuto pedal.

Next, a sostenuto process is performed (step S39). This processing is to increase the release time of the sound being generated when the sostenuto pedal is depressed. Specifically, a process of changing the target arrival time of the release phase of the envelope data, which is sent from the CPU 10 to the tone generator 19 and included in the timbre parameters already used for tone generation, is performed to be long. Thereafter, the sequence returns from the pedal processing routine to the main routine.

As described above, according to the electronic musical instrument according to the embodiment of the present invention, when the pedal is depressed, the pedal sound is generated according to the depressed speed. The sound of a natural instrument such as a piano is more closely simulated, and an atmosphere closer to a natural instrument can be obtained.

In the electronic musical instrument according to the second embodiment of the present invention, the case where the "stepping state" is the degree of stepping poison has been described. However, when the stepping amount is used as the "stepping state", the speed detecting mechanism 15 is used. Is replaced by a volume mechanism. This volume mechanism can use a volume, such as an expression pedal, that exhibits a different resistance value by rotating according to the amount of depression of the pedal. The CPU 10 detects the amount of depression based on a signal from the volume.

According to this structure, for example, the sound of the pedal colliding with the stopper when the pedal is depressed by the maximum amount can be simulated, so that an atmosphere close to a natural musical instrument can be produced. Note that both the stepping speed and the stepping amount are detected,
It is also possible to configure so as to generate a pedal sound in accordance with these combinations.

[0070]

As described in detail above, according to the present invention,
An electronic musical instrument capable of producing an atmosphere close to a natural musical instrument by faithfully simulating a sound corresponding to a pedal operation can be provided.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a main process used in the embodiment of the present invention.

FIG. 3 is a flowchart (part 1) illustrating a pedal process used in the embodiment of the present invention.

FIG. 4 is a flowchart (part 1) illustrating a pedal process used in the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 CPU 11 Program memory 12 Work memory 13 Panel interface circuit 14 Operation panel 15 Speed detection mechanism 16 Pedal 17 Keyboard interface circuit 18 Keyboard device 19 Sound source circuit 191 Waveform memory 192 D / A converter 193 Amplifier 194 Speaker

Claims (4)

[Claims] 1. A pedal, detecting means for detecting whether or not the pedal is depressed, and pedal sound generating means for generating a pedal sound when the detecting means detects that the pedal is depressed. Electronic musical instrument equipped. 2. The apparatus according to claim 1, wherein said pedal sound generating means includes a waveform memory for storing waveform data of the pedal sound. When the detecting means detects that the pedal is depressed, the waveform data of the pedal sound is read from the waveform memory. 2. The electronic musical instrument according to claim 1, wherein the electronic musical instrument generates a pedal sound based on the read waveform data. 3. An electronic musical instrument comprising: a pedal; detecting means for detecting a depressed state of the pedal; and pedal sound generating means for generating a different pedal sound in accordance with the depressed state detected by the detecting means. 4. The pedal sound generating means includes a waveform memory for storing waveform data of a plurality of pedal sounds according to a depression state of a pedal, and a pedal sound waveform corresponding to a depression state detected by said detection means. 4. The electronic musical instrument according to claim 3, wherein data is read from the waveform memory, and a pedal sound is generated based on the read waveform data.