JPH10319949A - Electronic musical instrument - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an electronic musical instrument capable of generating a rich sound as well as an acoustic piano when playing an actual music. An electronic musical instrument for generating a musical tone based on a musical tone signal, comprising: a keyboard device; detection means for detecting key depression and key release of the keyboard device; A determination means 10 for determining whether there is another key being pressed when it is detected, and a key depressing operation by the detection means when it is determined that there is another key being pressed. Is provided with musical tone signal generating means 16, 17 and 18 for generating a musical tone signal for generating a musical tone corresponding to the detected key and a reverberant tone corresponding to the other key being pressed.

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 for generating a musical sound containing reverberation, and more particularly to a technique for faithfully simulating a natural musical instrument containing reverberation.

[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 produced for the purpose of faithfully simulating the sound of an acoustic piano, which is a natural musical instrument. Therefore, in recent years, efforts have been made in recent years to simulate not only the normal tone generated by keying but also the sound (click sound) of the key colliding with the shelf board at the time of keying and to approximate the sound of an acoustic piano.

[0003] In addition to the direct sound generated based on the vibration of a string accompanying a keystroke, the sound generated by an acoustic piano is generated by reflecting the direct sound at various parts inside a housing. The reverberation sound and the vibration of the strings are transmitted to all parts constituting the acoustic piano, and include the sound generated by the vibration of the parts. Therefore, it is said that the acoustic piano contributes not only to its structure but also to all components to generate a rich sound. The sound of such an acoustic piano becomes even richer when the damper pedal is depressed, in other words, when the strings are released.

Conventionally, in an electronic piano, an attempt has been made to simulate such a rich sound of an acoustic piano, but the attempt has been limited to simulating a sound when a damper pedal is depressed. Incidentally, the sound when the damper pedal is depressed is created by the following method. A first method is to provide a reverb circuit and increase the degree of reverb applied by the reverb circuit when a damper pedal is depressed. The second is a method in which waveform data of a sound when a damper pedal is depressed is created in advance, and a sound is generated based on the waveform data when the damper pedal is depressed.

[0005]

However, in an acoustic piano, even when the damper pedal is not depressed, a sound having the same sound as when the damper pedal is depressed is generated. This is for the following reason. That is,
In the acoustic piano, the string corresponding to the key being pressed is released, so if attention is paid only to that string, the state is the same as when the damper pedal is depressed. Therefore, when another key is pressed in this state, the string corresponding to the pressed key vibrates, and this vibration is transmitted to the open string, thereby generating a sound having a unique sound.

In a conventional electronic piano, waveform data is created based on a sound generated by pressing one key,
It only generates sound based on this waveform data.
Therefore, in a recent electronic piano, a sound generated by pressing only one key is not inferior to that of an acoustic piano.

However, when actually playing a tune and comparing the two, there occurs a phenomenon that the sound of the electronic piano is inferior to that of an acoustic piano. This is because, as described above, in the state where a tune is being played on the acoustic piano, a key-pressed state exists in which another key is already pressed (a string is released) at a timing when a certain key is pressed. This makes the sound more enriched, whereas electronic pianos do not take into account the sound generated when the open strings are excited, even if the key is pressed as described above. to cause.

Accordingly, it is an object of the present invention to provide an electronic musical instrument capable of generating a rich sound as well as an acoustic piano when playing an actual music piece.

[0009]

In order to achieve the above object, an electronic musical instrument according to the present invention, which generates a musical tone based on a musical tone signal, comprises: a keyboard device; Detecting means for detecting key release, determining means for determining whether there is another key being pressed when the detecting means detects a key press, and determining whether another key being pressed by the determining means is present. If it is determined that there is, a tone signal generation for generating a tone signal for generating a tone corresponding to the key whose key depression is detected by the detection means and a reverberation tone corresponding to the other key being pressed. Means.

The "reverberation sound" in the present invention means a sound generated when any key of the keyboard device is newly pressed based on a key other than the key being pressed. The mechanism of generation of this reverberation is as follows. That is, in the acoustic piano, when the key is not pressed, the head of the hammer corresponding to the key is in contact with the string. Therefore, the strings corresponding to the keys that are not pressed are in a muted state, and even if the strings corresponding to the other keys vibrate, they are not easily affected.

However, in a state where a key is pressed, the head of the hammer corresponding to the key being pressed is separated from the string, so that the string is open. Therefore, when a string corresponding to a key other than the pressed key is struck,
The vibration of the string is transmitted to the string corresponding to the pressed key via a piece, and the string is excited to generate a unique sound. This sound is the "reverberation sound".

On the other hand, "musical sound" means various sounds generated based on the vibration of a string corresponding to a pressed key, such as a direct sound, a reflected sound, and a resonance sound of a housing. This "music tone" is the same as the sound generated by a conventional electronic piano.

According to the electronic musical instrument of the present invention, when a new key is pressed and there is a key which is already pressed, the conventional "musical tone"
In addition, a "reverberation" of the key being pressed is generated.
Therefore, for example, it is possible to faithfully simulate a sound generated in a key-depressed state when actually playing a song on an acoustic piano, so that a sound having a rich sound closer to that of an acoustic piano can be generated. .

The electronic musical instrument of the present invention further comprises a key depression state storage means for storing a key depression state of the keyboard device, the storage contents of which are sequentially changed based on a detection result by the detection means. The determination means may be configured to determine whether there is another key being pressed based on the contents stored in the key pressed state storage means.

Here, the pressed state of the keyboard device means a state indicating whether each key of the keyboard device is pressed or released. This key depression state is stored in the key depression state storage means. The key depression state storage means can be composed of, for example, a random accelerator memory (hereinafter, referred to as “RAM”). Therefore, according to this configuration, the current key depression state can be easily known by referring to the key depression state storage means.

In the electronic musical instrument according to the present invention, the musical sound signal generating means includes a musical sound waveform storing means for storing waveform data of musical sounds, a reverberant sound waveform storing means for storing waveform data of reverberant sounds, these musical sound waveform storing means, A tone generator circuit for generating a tone signal based on each waveform data stored in the reverberation sound waveform storage means, and when the determination means determines that there is another key being pressed, the tone generator circuit Can read the waveform data of the reverberation sound from the reverberation sound waveform storage means and the waveform data of the music tone from the musical sound waveform storage means, respectively, and generate a tone signal based on both the waveform data.

The waveform data stored in the musical sound waveform storage means and the reverberation sound waveform storage means can be created by modulating a collected sound signal by, for example, a pulse code modulation (PCM) method. In the PCM method, a recorded sound signal is sampled, quantized, and further encoded to generate waveform data. In addition, as the waveform data,
It can be created using not only the PCM method but also the DPCM, ADPCM method, and other various methods.

The waveform data stored in the musical tone waveform storage means records a sound generated by pressing only one key of a keyboard device of an acoustic piano, for example, as in a conventional electronic piano. PCM sound signal
It can be created by modulating with the method. At this time, the waveform data for each key may be created and stored in the musical tone waveform storage means, or the entire key area may be divided into a plurality of key areas, and the waveform data for each key area may be created to generate a musical tone. It may be stored in the waveform storage means. In the latter case, there is an advantage that the amount of waveform data can be reduced.

The waveform data stored in the reverberation sound waveform storage means can be created as follows. In a first method, a predetermined key is depressed while a key for which a reverberation sound is to be generated is depressed, and a sound generated thereby (first sound) is generated.
Sound). Next, the predetermined key is depressed in a state where the key is not depressed, and the sound generated thereby (second sound)
To record. Next, the signal of the second sound is subtracted from the signal of the recorded first sound. The result of the subtraction is a signal of “reverberation”. This reverberation signal
As described above, the waveform data to be stored in the reverberation sound waveform storage unit is created by performing modulation by the PCM method.

The waveform data of the reverberation sound is obtained by actually subtracting the signal of the second sound from the recorded signal of the first sound using, for example, an operational amplifier, and converting the signal obtained by the subtraction into a PCM signal. It can be created by modulating with a method. Alternatively, the signals of the first sound and the second sound are
After independently creating waveform data of the first sound and waveform data of the second sound by modulating in the M system,
For example, on a computer, the second sound waveform data
May be created by subtracting the waveform data of the sound.

In the second method, a stopper mechanism is provided so that a hammer operating in conjunction with the key does not actually hit the string even if the key is hit. After such a measure is taken, a predetermined key is depressed while a key for generating a reverberation sound is pressed, and a sound generated by this depressing is recorded.
Then, the recorded reverberation signal is modulated by the PCM method as described above to create waveform data to be stored in the reverberation sound waveform storage means.

The reverberation sound waveform storage means stores waveform data of a plurality of reverberation sounds corresponding to a key range, and the sound source circuit determines that there is another key being pressed by the determination means. In this case, the waveform data of the reverberation sound corresponding to the key range to which the other key belongs can be read from the reverberation sound waveform storage means.

For example, the entire key range of the keyboard device is 1
It divides into a plurality of octave key ranges, checks which octave the “other key being pressed” belongs to, and generates a reverberation sound of the octave to which the other key belongs. In this case, the reverberation sound waveform storage means stores reverberation sound waveform data for each octave. According to this configuration, different reverberation sounds are obtained depending on the key range, so that a sound closer to that of an acoustic piano can be generated. In the above description, each key range is set to one octave, but the number is not limited to one octave, and the number of keys included in each key range can be set arbitrarily. it can.

The reverberation sound waveform storage means stores waveform data of a plurality of reverberation sounds in accordance with a combination of a key range and a key depression pattern. If it is determined that there is, the waveform data of the reverberation sound corresponding to the combination of the key range and the key depression pattern of the other key can be read from the reverberation sound waveform storage means.

Here, the "key pressing pattern" refers to a form in which a player presses a key of a keyboard device. Therefore, the types of key pressing patterns include not only a case where one key is pressed but also a form where multiple keys are pressed. As this key press pattern, for example, a code form can be used. In the electronic musical instrument having this configuration, the type of the “other key being pressed” is checked to determine which chord form, and a reverberation sound corresponding to the chord form is generated. In this case, the reverberation sound waveform storage means stores reverberation waveform data for each chord form. According to this configuration, a reverberation sound corresponding to the key depression pattern is obtained, so that a sound closer to an acoustic piano can be generated. The key depression pattern is not limited to the code form, but may be any form.

Further, the reverberation sound waveform storage means stores waveform data of a plurality of reverberation sounds corresponding to a combination of a key range and a key depression pattern, and the sound source circuit stores another key being depressed by the judgment means. If it is determined that there is, the waveform data of the reverberation sound corresponding to the combination of the key range and the key depression pattern of the other key can be read from the reverberation sound waveform storage means.

This electronic musical instrument is configured to generate a reverberation sound in accordance with the combination of the above-mentioned key range and key depression pattern. According to this configuration, a reverberation sound corresponding to each key pressing pattern in each key range is generated, so that a sound closer to an acoustic piano can be generated.

[0028]

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,
In the following, it is assumed that the reverberation sound corresponding to the other key being pressed is determined according to the combination of the key range of “other key being pressed” and the key pressing pattern.

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 a “CPU”) 10, a program memory 11, a work memory 12, a key depression state table memory 1
3. Panel interface circuit 14, keyboard interface circuit 15, musical sound waveform memory 16, reverberant sound waveform memory 1.
7 and the tone generator circuit 18 are interconnected by a bus 30. The bus 30 is used by the CPU 10 and the tone generator 18 in a time sharing manner. The bus 30 is composed of 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 of the electronic musical instrument according to a control program stored in the program memory 11. For example, the CPU 10
Performs keyboard processing according to keyboard operation, panel processing according to panel operation, and 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 example, for each of a plurality of instrument ranges for each of a plurality of instrument sounds. As tone parameters particularly related to the present invention, tone parameters for generating reverberation are provided corresponding to combinations of each key range and key depression pattern. Each timbre parameter is, for example, a waveform address, frequency data,
It is composed of envelope data, filter coefficients, 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.

The key press state table memory 13 stores a key press state of a keyboard device 150 described later in a table format.
FIG. 2 shows an example of this key pressing state table. In FIG. 2, the note number is a unique number assigned to each pitch. This note number matches the key number assigned to each key of the keyboard device 150. However, the keyboard device 15
Since 0 has only 88 keys, the key number of the lowest key is associated with the note number "21", and the key number of the highest key is associated with the note number "108".

The key depression state table in this embodiment has a storage area corresponding to 128 note numbers. Accordingly, note numbers (“0” to “20”) for very low notes and note numbers (“109” to “127”) for very high notes, which cannot be generated by the keyboard device 150, for example, obtained from a MIDI message, can be obtained. )
Can be handled. The status bit field of the key press status table is “1” if the key corresponding to the note number is being pressed, and “0” otherwise.
Is set to

An operation panel 140 is connected to the panel interface circuit 14. On the operation panel 140,
For example, various switches, numerical input devices, indicators, display devices, and the like (not shown) are provided. The various switches include, for example, a mode setting switch, a tone color selection switch, a volume switch, an effect selection switch, and the like. The numerical value input device is used for inputting various numerical values, and includes, for example, an up / down switch, a jog dial, a numeric keypad, and 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 other display devices can be used.

The panel interface circuit 14 controls transmission and reception of data between the operation panel 140 and the CPU 10. That is, the panel interface circuit 14 generates panel data based on the signal received from the operation panel 140 and sends the panel data to the CPU 10. This panel data
It 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. CPU
10 performs various processes according to the panel operation based on the panel data. Panel interface circuit 1
4 sends the display data received from the CPU 10 to the operation panel 140. Thus, display of data on the display device of the operation panel 140, control of turning on / off of various indicators, and the like are performed.

A keyboard device 150 is connected to the keyboard interface circuit 15. The keyboard device 150 has 88 keys for instructing sounding / muting. Note that the number of keys of the keyboard device 150 is not limited to 88, and may be any number. The keyboard device 150 uses a two-contact key. That is, each key of the keyboard device 150 has two key switches that open and close in conjunction with key depression or key release, and that open and close at different pressing depths.

The keyboard interface circuit 15 detects the pressed or released state of each key and the strength of key touch. That is,
The keyboard interface circuit 15 generates key data indicating a key press or a key release and touch data indicating a key touch strength from a signal indicating an on / off state of each key switch received from the keyboard device 150 and sends the key data to the CPU 10. . The key data is composed of a bit string corresponding to each key, and each bit is “1” indicating that the key is being depressed when both of the two key switches provided on the key are turned on, otherwise. In this case, it is set to “0” indicating that the key is being released. The touch data is created based on the time from when one key switch is turned on to when another key switch is turned on. 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. Details of the sound generation and mute processing will be described later.

The musical tone waveform memory 16 stores waveform data of musical tones, and is constituted by, for example, a ROM. The tone waveform memory 16 stores a plurality of waveform data corresponding to a plurality of tone color parameters.
Waveform data can be created, for example, by converting emitted musical sounds into electrical signals and subjecting them to pulse code modulation (PCM). The waveform data in the tone waveform memory 16 is read out by the tone generator 18.

The reverberation sound waveform memory 17 stores waveform data of a plurality of reverberation sounds corresponding to a combination of a key range and a key depression pattern. The reverberation waveform data is used to generate a sound generated when any key of the keyboard device 150 is newly pressed, based on a key other than the key being pressed. The reverberation sound waveform memory 17 stores a plurality of reverberation waveform data corresponding to a plurality of chord forms for each octave of the keyboard device 150. The waveform data in the reverberation sound waveform memory 17 is read out by the sound source circuit 18.

The D / A converter 180 is connected to the tone generator 18. The sound source circuit 18 can be composed of, for example, a digital signal processor (DSP). The tone generator 18 has a plurality of sound channels.
A tone signal is generated according to an instruction from the CPU 10. That is, when the tone generator 18 receives the data and tone color parameter designating the sound channel from the CPU 10, the tone generator 18 activates the specified sound channel. The activated sound channel reads waveform data corresponding to the timbre parameter from the musical tone waveform memory 16 and / or the reverberant acoustic waveform memory 17, and adds an envelope to the waveform data to generate a digital musical tone signal. This digital tone signal is sent to the D / A converter 180.

The D / A converter 180 converts the input digital tone signal into an analog tone signal. This D / A
The output from converter 180 is provided to amplifier 181. The amplifier 181 amplifies the input musical tone signal and sends it to the speaker 182. The speaker 182 includes an amplifier 181
Is converted into a sound signal and output. Thereby, a musical sound is generated from the speaker 182.

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. 3 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 140 is scanned. As a result, panel data is read from the operation panel 140 via the panel interface circuit 14. Then, the switch data in the panel data (hereinafter referred to as “new switch data”) and the switch data read from the operation panel 140 in the previous panel processing, and
2 stored in the predetermined area (hereinafter, referred to as switch data).
Exclusive OR operation with “old switch data” is performed. This calculation result is stored in a predetermined area of the work memory 12 as a panel event map. Thereafter, the new switch data is stored in a predetermined area of the work memory 12 as old switch data.

Next, it is checked whether or not there is a switch ON event. This is performed by checking whether the bits corresponding to the same switch in the panel event map and the new switch data are both on.

Here, if it is determined that there is a switch on event, a process for realizing the function of the switch is performed. For example, if the mode setting switch is an ON event, the process of changing the mode is performed. If the tone selection switch is an ON event, the process of selecting a tone is performed.
Each is done. In these processes, a process of displaying characters and the like on a display device as necessary,
Illumination / extinguishing processing of an indicator (not shown) is performed.

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 tone color selection mode, the numerical value input by the numerical value input device is stored as a tone color number and displayed on the display device. As a result, a new timbre is determined.

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 150 is generated.
The details of this keyboard processing will be described later with reference to the flowchart of FIG.

Next, "other processing" is performed (step S13). In this “other processing”, for example, an external M
A process of transmitting and receiving MIDI data to and from an IDI device;
Processing such as extending sound is performed in response to depression of a damper pedal (not shown). Thereafter, the process returns to step S11, and the same processing is repeated thereafter.

As described above, when the operation of the operation panel 140 or the keyboard device 150 is performed in the course of repeatedly executing the steps S11 to S13 of the main processing routine, a process corresponding to the operation is performed. Thereby, various functions as an electronic musical instrument are realized.

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

In the keyboard processing, first, a keyboard scanning processing is performed (step S20). In this keyboard scanning process, key data and touch data are read from the keyboard device 150 via the keyboard interface circuit 15. Then, the key data therein (hereinafter, referred to as “new key data”) and the key data (hereinafter, referred to as “new key data”) read from the keyboard device 150 in the previous keyboard processing and already stored in a predetermined area of the work memory 12. Exclusive OR operation with “old key data”) is performed. The calculation result is stored in a predetermined area of the work memory 12 as a keyboard event map. If the content of this keyboard event map is not zero, it indicates that there was a key event, and if it is zero, it indicates that there was no key event. Thereafter, the new key data is stored in a predetermined area of the work memory 12 as old key data.

Next, it is checked whether or not there is a key pressing event (step S21). This means that the bit in the new key data corresponding to “1” in the key event map is “1”.
This is done by checking if

If it is determined in step S21 that there is a key pressing event, it is then checked whether there is a sound being generated, that is, whether there is a key being pressed (step S2).
2). This is performed by referring to the key depression state table. That is, it is checked whether or not at least one or more "1" portion exists in the status bit column of the key-depression status table. It is determined that there is no sound.

If it is determined in step S22 that there is a sound being generated, reverberation processing is performed (step S23). In other words, that there is a sound being pronounced,
This means that another key is already being pressed when the key pressing event occurs, that is, an open string exists. Therefore, in order to simulate that the key press event excites the open string, a reverberation sound generation process is performed.

In the reverberation generation process, first, it is checked which octave the key being pressed belongs to. This is performed by sequentially examining the status bit column of the key depression status table. At this time, when it is determined that a plurality of keys over two or more octaves are pressed, one predetermined octave is selected. The octave selected here can be, for example, the lowest octave. The selected octave may be the highest octave or an intermediate octave.

Next, a code detection process is performed based on the key being pressed. For this chord detection processing, for example, a well-known chord detection technique used when performing automatic accompaniment can be used. Thus, the code form is determined. Next, the timbre parameters corresponding to the selected octave and the detected chord form are read from the program memory 11.

Next, a predetermined sound channel of the tone generator circuit 18 is assigned for sound generation. Then, the read timbre parameters are sent to the assigned tone generation channel of the tone generator circuit 18. As a result, a digital tone signal based on the tone color parameter is generated in the assigned tone generation channel, and is sequentially sent to the D / A converter 180, the amplifier 181 and the speaker 182. Thereby, a reverberation sound corresponding to the open string is generated. If it is determined in step S22 that there is no sound being generated, the process in step S23 is skipped.

Next, a tone generation process is performed (step S).
24). This sound generation process is a process of generating a sound corresponding to a key having a key press event. In this sound generation processing, sound is assigned to a predetermined sound channel of the tone generator circuit 18. Next, the key number of the key that had the key press event,
One tone color parameter is read from the program memory 11 based on the touch data and the tone color selected at that time, and is sent to the tone generator 18. As a result, a digital tone signal based on the tone color parameter is generated in the tone generation channel assigned by the tone generator circuit 18, and is generated by the D / A converter 180 and the amplifier 181.
, And are sequentially transmitted to the speaker 182 to generate a musical tone.

The processes of steps S23 and S24 are continuously executed, and signals corresponding to musical sounds and reverberation sounds are separately generated using different sounding channels. Thus, sounds based on both of these signals appear to be generated simultaneously. Therefore, a musical tone including a reverberant sound like an acoustic piano is generated.

Next, the key depression state table is updated (step S25). In this process, “1” is written in the status bit column of the key press status table corresponding to the key in which the key press event occurred. As a result, the fact that the key is being pressed is stored in the key pressed state table. Thereafter, the sequence returns from the keyboard processing routine to the main processing routine.

If it is determined in step S21 that there is no key press event, then it is checked whether there is a key release event (step S26). This is performed by checking whether the bit in the new key data corresponding to “1” in the key event map is “0”.

If it is determined that there is no key release event, the sequence returns from the keyboard processing routine to the main processing routine. On the other hand, when it is determined that there is a key release event, a mute process is performed (step S27). In this mute processing, data for setting the envelope to zero is sent to the sounding channel corresponding to the released key, and thereafter, the assignment of the sounding channel is released. As a result, the sound being generated is muted.

Next, the key depression state table is updated (step S28). In this process, “0” is written in the status bit column of the key press status table corresponding to the key having the key release event. As a result, the fact that the key has been released is stored in the key pressed state table. Thereafter, the sequence returns from the keyboard processing routine to the main processing routine.

As described above, according to the electronic musical instrument of the embodiment of the present invention, if a key is already depressed when a new key is depressed, in addition to the conventional "tone", Since the reverberation sound of the key already pressed is generated, a sound having a rich sound closer to that of an acoustic piano can be generated.

In the above embodiment, when it is determined in the reverberation sound generation process (step S23) that a plurality of keys over two or more octaves are pressed,
Although one octave is selected and the reverberation sound corresponding to the octave is generated, the reverberation sound of all octaves to which the pressed key belongs may be generated. According to this configuration, a sound closer to that of an acoustic piano can be generated.

[0069]

As described in detail above, according to the present invention,
It is possible to provide an electronic musical instrument capable of generating a rich sound as in the case of an acoustic piano when playing an actual song.

[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 diagram showing an example of a key pressing state table used in the embodiment of the present invention.

FIG. 3 is a flowchart showing a main process used in the embodiment of the present invention.

FIG. 4 is a flowchart showing keyboard processing used in the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 CPU 11 Program memory 12 Work memory 13 Key pressing state table memory 14 Panel interface circuit 15 Keyboard interface circuit 16 Musical sound waveform memory 17 Reverberation acoustic waveform memory 18 Sound source circuit 140 Operation panel 150 Keyboard device 180 D / A converter 181 Amplifier 182 Speaker

Claims (6)

[Claims] An electronic musical instrument for generating a musical tone based on a musical tone signal, comprising: a keyboard device; detecting means for detecting a key press and release of the keyboard device; and a key press detected by the detecting means. At this time, a judgment means for judging whether or not there is another key being pressed, and when the judgment means judges that there is another key being pressed, a key depression is detected by the detection means. A musical tone signal generating means for generating a musical tone corresponding to a key and a musical tone signal for generating a reverberation tone corresponding to another key being pressed. 2. A key depression state storage means for storing a key depression state of the keyboard device, wherein the storage contents are sequentially changed based on a detection result by the detection means, Determining whether there is another key being pressed based on the storage contents of the key pressing state storage means.
An electronic musical instrument according to claim 1. 3. The musical sound signal generating means includes: a musical sound waveform storing means for storing waveform data of a musical sound; a reverberant sound waveform storing means for storing waveform data of a reverberant sound; Means for generating a tone signal based on each waveform data stored in the means, and when the determination means determines that there is another key being pressed, the sound source circuit performs the reverberation. 3. The electronic musical instrument according to claim 1, wherein waveform data of a reverberation sound is read from the sound waveform storage means, and waveform data of a tone is read from the musical sound waveform storage means, and a tone signal is generated based on both of the waveform data. . 4. The reverberation sound waveform storage means stores waveform data of a plurality of reverberation sounds corresponding to a key range.
4. The reverberation sound waveform storage unit according to claim 3, wherein when the determination unit determines that there is another key being pressed, waveform data of a reverberation sound corresponding to a key range to which the other key belongs is read from the reverberation sound waveform storage unit. Electronic musical instrument. 5. The reverberation sound waveform storage means stores waveform data of a plurality of reverberation sounds corresponding to a key depression pattern, and the sound source circuit determines that there is another key being pressed by the determination means. 4. The electronic musical instrument according to claim 3, wherein the reverberation sound waveform data corresponding to the key depression pattern of the other key is read out from the reverberation sound waveform storage means. 6. The reverberation sound waveform storage means stores waveform data of a plurality of reverberation sounds corresponding to a combination of a key range and a key depression pattern, and the tone generator circuit controls another key being depressed by the determination means. 4. The electronic musical instrument according to claim 3, wherein when it is determined that there is a reverberation sound waveform data corresponding to the combination of the key range and the key depression pattern of the other key, the reverberation sound waveform storage means.