JPH06289860A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To provide the electronic musical instrument generating a sound image which gives a three-dimensional feeling and swing close to a live performance and is rich in presence as to an electronic musical instrument which has plural output systems. CONSTITUTION:The electronic musical instrument is equipped with four sound emitting means 26-29 which emit a musical sound, a specifying means which specifies one of the four sound emitting means, a storage means 17 which is stored with automatic musical performance data, a musical sound signal generating means 19 which generates the musical sound signal according to the automatic musical performance data stored in the storage means, and a control means 10 which supplies the musical sound signal generated by the musical sound signal generating means to the sound emitting means specified by the specifying means.

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 plurality of output systems.

[0002]

2. Description of the Related Art Conventionally, an electronic musical instrument called an electronic keyboard has been developed and put into practical use. Such an electronic keyboard has a 1-channel or 2-channel output system. That is, the hardware from the sound source to the speaker (or the output terminal), and the software for driving this hardware to generate a predetermined musical sound are configured to produce sound of up to two channels.

The above-mentioned electronic keyboard having only one channel output system can realize only monaural performance.
An electronic keyboard having a channel output system can be played by stereo reproduction.

On the other hand, the electronic keyboard as described above is generally provided with an automatic performance function, and by using this automatic performance function, the performance of a predetermined part is left to the automatic performance, and the player plays the specific part. You can play the form. For example, playing a melody with the tone of a trumpet while automatically playing the musical sounds of each part such as a drum, bass, or piano, or playing a melody with the tone of a specific instrument with the automatic accompaniment of an orchestra as a background. It can take the form.

The automatic performance function as described above is realized by using, for example, a multi-tone sound source. That is, a sound source is assigned to each part, the automatic performance data of each part stored in advance in the memory (or sequencer) for automatic performance data is sequentially read, and this is sent to the assigned sound source for simultaneous sound generation. It is realized by.

[0006]

However, an electronic keyboard having an output system of only one channel has a drawback that the stereoscopic effect of the sound is poor because it can only perform monaural performance. Therefore, recently, electronic keyboards having a two-channel output system have become mainstream.

With an electronic keyboard having a two-channel output system, the sound image localization can be controlled by stereo reproduction, so that a performance with a sense of realism is possible. However, when reproducing automatic performance data including a plurality of musical instrument sounds such as in an orchestra, the sound image formed by the output system of 2 channels has a stereoscopic effect and a dynamic feeling compared to the sound image in the live performance. There was a problem that it didn't feel good and sounded flat.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an electronic musical instrument having a stereoscopic effect and a dynamic feeling similar to a live performance, and capable of obtaining a realistic sound image. To aim.

[0009]

In order to achieve the above object, an electronic musical instrument according to claim 1 has at least four sound emitting means for emitting a musical sound, and any one of the four sound emitting means. Designating means for designating, storage means in which automatic performance data is stored, tone signal generation means for generating a tone signal in accordance with the automatic performance data stored in the storage means, and tone signal generated by the tone signal generation means And a control means for giving the sound emitting means designated by the designating means.

Further, for the same purpose, the electronic musical instrument according to claim 2 is an electronic musical instrument having at least two speaker pairs in which two musical instruments are paired for stereo reproduction.
Designating means for designating any one of the at least two pairs of speakers, storage means for storing automatic performance data, and a tone signal for generating a pair of stereo musical tone signals according to the automatic performance data stored in the storage means. Generating means and a pair of stereo tone signals generated by the tone signal generating means,
And a control means for giving to the speaker pair designated by the designation means.

[0011]

In the invention described in claim 1, any one of at least four sound emitting means is designated by the designating means,
The designated sound emitting means emits a musical tone based on the musical tone signal generated according to the automatic performance data stored in the storage means. As the designation means,
For example, special data stored as a kind of automatic performance data in the storage means, or an operator provided on an operation panel or the like can be used.

Thus, for example, speakers as sound emitting means are arranged at at least four points such as front, rear, left, right, top and bottom of the listener, and sound is emitted based on the automatic performance data created in accordance with the arrangement of the speakers. Therefore, it is possible to create an arbitrary sound image space and obtain a sound image having a stereoscopic effect and a feeling of dynamism similar to a live performance.

According to the second aspect of the invention, any one speaker pair out of at least two speaker pairs is designated by the designating means, and the designated speaker pair is stored in the storage means. A musical tone based on a stereo musical tone signal generated according to automatic performance data is emitted in stereo. Also in this case, as the designation means, for example, special data stored as a kind of automatic performance data in the storage means, or an operator provided on the operation panel or the like can be used.

Therefore, since sound is emitted based on the automatic performance data created so that the sound image localization is different due to the stereo effect of each speaker pair, a sound image space having a stereoscopic effect and a lively feeling similar to a live performance. Can be produced.

[0015]

Embodiments of the electronic musical instrument of the present invention will now be described in detail with reference to the drawings, centering on the configuration and operation of the portion related to the output system relating to the features of the present invention. In addition,
In the present embodiment, a "16" part (a control unit for generating one musical sound, corresponding to 16 MIDI channels) and an "4" output channel (sound emitting channel) are provided. However, the present invention is not limited to this.

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of an electronic musical instrument of the present invention. Central processing unit (hereinafter referred to as "CPU") 1 which is a main component of the electronic musical instrument
0, a program memory 11, a RAM 12, a panel interface circuit 13, a keyboard interface circuit 15, an automatic performance data memory 17, a musical tone waveform memory 19 and a tone generator (tone generator) 18 are interconnected via a system bus 30.

The system bus 30 is, for example, an address line,
A bus line including a data line, a control signal line, and the like, which is used for transmitting and receiving various data between the above-mentioned constituent elements. This system bus 30 is a CP
It is used by U10 and the sound source 19 in a time division manner.

The CPU 10 has a program memory 11
According to the control program stored in, the entire electronic musical instrument is controlled. For example, the CPU 10
A tone color number is fetched from the operation panel 14 via the panel interface circuit 13, and a key number, initial touch data, etc. are fetched from the keyboard device 16 via the keyboard interface circuit 15, and, for example, a waveform address , Frequency data, envelope data, filter coefficients, etc. are generated and sent to the sound source 19 to generate a predetermined musical sound.

Further, the CPU 10 reads out the automatic performance data from the automatic performance data memory 17 via the system bus 30, subjects the automatic performance data to a predetermined conversion, and performs system conversion on the system bus 30.
A predetermined automatic performance is performed by sending the sound to the sound source 19 via.

The CPU 10 has a built-in time counter for automatic performance. The time counter starts its operation by a predetermined start command, and thereafter, counts up in a constant cycle. This time counter is used to detect the timing of sound generation or mute in the automatic performance processing described later.

A MIDI interface circuit 40 is connected to the CPU 10 via a dedicated line.
The MIDI interface circuit 40 controls the transfer of MIDI data between the electronic musical instrument and an external device. The external device may be, for example, a personal computer that processes MIDI data, a sequencer, or another electronic musical instrument.

The program memory 11 is, for example, RO
The control program for operating the CPU 10 is stored in addition to the CP.
Various types of fixed data used by U10 for various processes are stored.

The stored contents of the program memory 11 are
It is read by the CPU 10 via the system bus 30. That is, the CPU 10 reads a control program (command) from the program memory 11 via the system bus 30, interprets and executes the program, and reads predetermined fixed data for use in various processes.

The RAM 12 temporarily stores various data used for execution of the control program, and defines areas such as a data buffer, a register, and a flag. The RAM 12 is accessed by the CPU 10 via the system bus 30.

The panel interface circuit 13 includes:
The operation panel 14 is connected. This operation panel 14
Are used for instructing the electronic musical instrument to perform various operations. For example, as shown in the external plan view of FIG. This operation panel 1
The switch 4 is provided with, for example, various switches and indicators.

Although not shown in detail in the various switches, various switches for controlling the electronic musical instrument, for example, sound effect switches such as a tone color selection switch, a volume control switch, a rhythm selection switch, a reverb switch, and an automatic switch are provided. Performance switches etc. are included.

The tone color selection switch is used to select one tone color from a plurality of tones prepared for the electronic musical instrument, the volume control switch is used to control the volume, and the rhythm selection switch is used. From the rhythm 1
One is used to select one rhythm, the sound effect switch is used to specify the type of sound effect (for example, reverb), and the automatic performance switch is used to control the start or stop of automatic performance. is there.

Further, the display includes, for example, an LCD display for displaying the state of the electronic musical instrument and various messages by characters and the like, an LED display for indicating the setting state of each switch, and the like. The display control of these display devices is performed by the CPU 10.

As will be described later, in the case of a configuration in which a speaker for emitting a musical sound based on the automatic performance data of each part is designated from the operation panel 14, as a designation means for designating the speaker on the operation panel 14. Switch is provided.

The panel interface circuit 13 controls transmission / reception of data between the operation panel 14 and the CPU 10. That is, the panel interface circuit 13
Sends a scan signal to the operation panel 14, and inputs a signal returned from the operation panel 14 indicating ON / OFF of each switch in response to the scan signal.

Then, from this signal, each switch is turned on / off.
Generates panel data consisting of offs corresponding to bits,
It is sent to the CPU 10 via the system bus 30. This panel data is stored in the RAM 12 under the control of the CPU 10 and is used to determine the presence / absence of a panel event (details will be described later).

Further, the panel interface circuit 13 is
The display data sent from the CPU 10 via the system bus 30 is sent to the operation panel 14. As a result, the display contents of the LCD display provided on the operation panel 14 are changed, and the LED display is turned on or off.

A keyboard device 16 is connected to the keyboard interface circuit 15. The keyboard device 16 has a plurality of keys for designating a pitch. As the keyboard device 16, for example, a two-contact type keyboard device is used, and it is possible to detect the initial touch data as well as turning the key on / off. That is, each key of the keyboard device 16 has two key switches that are turned on / off by a key pressing operation or a key releasing operation, and each key switch is turned on / off at different pressing depths.

The keyboard interface circuit 15 controls transmission / reception of data between the keyboard device 16 and the CPU 10. Specifically, the keyboard interface circuit 15
A scan signal is sent to the keyboard device 16, and a signal indicating the on / off state of the two key switches of each key is sent back from the keyboard device 16 in response to the scan signal.

Then, from the received signal, key data and initial touch data in which ON / OFF of each key is associated with a bit are generated and sent to the CPU 10 via the system bus 30. The key data and the initial touch data are stored in the RAM 12 under the control of the CPU 10 and used to judge the presence / absence of a keyboard event. Then, based on the result of this determination, sounding / silence processing is performed in response to the key depression or key release of the keyboard device 16.

The automatic performance data memory 17 corresponds to a storage means, and is composed of, for example, a ROM. The automatic performance data memory 17 stores automatic performance data corresponding to a plurality of automatic performance songs.

The above-mentioned automatic performance data is constructed so that automatic performance (two sets of stereo performances) can be performed by four output channels for each part of the automatic performance music. Figure 7
FIG. 9A shows an example of the data format of "speaker select" and "panpot select" which are automatic performance data according to the features of the present invention.

The automatic performance data of "speaker select" corresponds to the designating means and is composed of 4 bytes. The speaker select automatic performance data is used to specify the speaker used for sound generation. The first byte of the speaker select data indicates a status "BH"("H'is a hexadecimal number. The same applies hereinafter) indicating a data type and a part (corresponding to 16 MIDI channels). Channel number "n
H ". The second byte is a step time indicating the execution timing of the automatic performance data.

The third byte is a part of the status,
This is to instruct whether the tone is a drum tone or a tone other than the drum tone. It is recognized that "speaker select" is made by the upper 4 bits of the data of the third byte and the data of the first byte. The fourth byte is used as speaker designation information that designates a speaker used for sound emission. In the case of this embodiment, the value of the 4th byte is "00".
H ~ 3FH "A group speaker (speaker 2
6 and 27), and in the case of “40H to FFH”, the speaker of group B (speakers 28 and 29) is designated.

The automatic performance data of "Panpot Select" is composed of 4 bytes and is used for determining the sound image localization of a pair of speakers. The 1st and 2nd bytes of the panpot select data are the same as the speaker select. The third byte is a part of the status. The upper 4 of the data of the 3rd byte and the data of the 1st byte
It will be recognized that it is a "panpot select" with a bit.

The fourth byte is panpot designating information for designating the position of the panpot, and only the upper 4 bits are used. Therefore, 16 types of sound image localization can be designated for each part.

The speaker designation information and the panpot designation information are set in the play buffer by executing the respective automatic performance data of the speaker selection and the panpot selection. Here, the play buffer is a buffer provided for each part, and stores various control information for each part, that is, each musical sound, such as the above-mentioned speaker designation information and panpot designation information, as well as tone color information and volume information. .

Which play buffer to set is
It is designated by the channel number "n" included in the automatic performance data. The contents of this play buffer are referred to when the automatic performance data of the sounding instruction is executed.

The automatic performance data stored in the automatic performance data memory 17 is converted into data in a format that can be processed by the tone generator 19 in the automatic performance processing described later, and sent to the tone generator 19.

The automatic performance data may be stored in the RAM 12 instead of the automatic performance data memory 17. In this case, for example, a floppy disk device is connected to the system bus 30 and automatic performance data is stored in the floppy disk so that the automatic performance data can be transferred from the floppy disk mounted in the floppy disk device when the electronic musical instrument is powered on. It may be configured to be loaded in the RAM 12.

The tone waveform memory 18 stores tone code data that has been pulse code modulated (PCM). The musical tone waveform memory 18 stores a plurality of types of musical tone waveform data corresponding to each key range and each tone color in order to realize a plurality of tone colors. The musical tone waveform data corresponding to each tone color is separately stored for the left channel and the right channel in order to enable stereo reproduction.

The sound source 19 corresponds to a tone signal generating means, and is provided with, for example, a plurality of oscillators (for example, 48 oscillators), and each oscillator constitutes one sounding channel. When one musical tone is generated, one to several tone generation channels (oscillators) are assigned to one part.

The oscillator to which the sound is assigned reads the tone waveform data for the left and right channels stored in the tone waveform memory 18 in a time-division manner, and an envelope according to the panpot information stored in the play buffer is read into this. In addition, digital tone signals for the left and right channels are generated in a time division manner.

The digital tone signals for the left and right channels, which are time-divided by the sound source 19, are generated by the D / A converter 2 according to the speaker designation information stored in the play buffer.
Sent to either 0 or 21.

The D / A converter 20 converts the input digital musical tone signal into an analog musical tone signal, separates it into a right channel analog musical tone signal and a left channel analog musical tone signal, and outputs the analog musical tone signal. The analog tone signal for the right channel converted and separated by the D / A converter 20 is sent to the amplifier 22, and the analog tone signal for the left channel is sent to the amplifier 23.

The amplifier 22 amplifies the input right channel analog tone signal by a predetermined amplification factor and outputs it. The analog tone signal for the right channel, which has been subjected to predetermined amplification by the amplifier 22, is sent to the speaker 26. Similarly, the amplifier 23 amplifies the input analog tone signal for the left channel at a predetermined amplification rate and outputs it. The analog tone signal for the left channel, which has been subjected to predetermined amplification by the amplifier 23, is sent to the speaker 27.

The D / A converter 21 converts the input digital musical tone signal into an analog musical tone signal, and separates it into a right channel analog musical tone signal and a left channel analog musical tone signal for output. The right channel analog tone signal converted and separated by the D / A converter 21 is sent to the amplifier 24, and the left channel analog tone signal is sent to the amplifier 25.

The amplifier 24 amplifies the input right channel analog tone signal by a predetermined amplification factor and outputs it. The analog tone signal for the right channel, which has been amplified by the amplifier 24, is sent to the speaker 28. Similarly, the amplifier 25 amplifies the input analog tone signal for the left channel at a predetermined amplification rate and outputs it. The analog tone signal for the left channel, which has been amplified by the amplifier 25, is sent to the speaker 29.

The speakers 26 to 29 correspond to sound emitting means, and are well known ones for converting an analog musical tone signal as an electric signal into an acoustic signal. This speaker 26 ~
By 29, a tone corresponding to the depression of a key of the keyboard device 16 or the automatic performance data read from the automatic performance data memory 17 is emitted.

FIG. 2 is a diagram showing an arrangement example of the speakers 26 to 29. FIG. 2A is a plan view and FIG. 2B is a side view. Speakers 26 and 2 forming group A
The reference numeral 7 designates an operation panel 1 provided at substantially the center of the electronic musical instrument.
It is provided at both ends of 4 inclining to the front side in the figure. As the speakers 26 and 27, for example, 8 cm
A speaker is used. The sound images from the speakers 26 and 27 are localized on the front side in the figure with respect to the line connecting the speakers 26 and 27.

Speakers 28 and 2 forming a B group
9 are provided at both ends of the main body case on the back side of the operation panel 14 of the present electronic musical instrument in the figure. As the speakers 28 and 29, for example, 12 cm speakers are used.
An opening 50 is formed in the main body case on the side opposite to the opening surface of the speakers 28 and 29.
Music sounds are also emitted from. The sound images from these speakers 28 and 29 are
The localization is determined on the front side of the figure from the line connecting 9.

With the arrangement of the speakers, the sound image localization formed by the stereo reproduction by the speakers of the A group and the sound image localization formed by the stereo reproduction by the speakers of the B group are separated into front and rear, and a sound field with a sense of depth is realized. It is possible.

Next, the operation of the electronic musical instrument to which the electronic musical instrument of the present invention is applied in the above configuration will be described with reference to the flow charts of FIGS. .

FIG. 3 is a flow chart showing the main routine of this electronic musical instrument, which is started by turning on the power.
That is, when the power is turned on, first, initialization processing is performed (step S10).

This initialization process is a process of setting the internal state of the CPU 10 to the initial state and setting the initial values to the registers, counters or flags defined in the RAM 12. In addition, in this initialization process, the sound source 1
A process of sending predetermined data to 9 and preventing an unnecessary sound from being generated when the power is turned on is also performed.

When this initialization processing is completed, switch event processing is performed (step S11). Details of the switch event process will be described with reference to the flowchart of FIG.

In the switch event process, the presence or absence of a switch event is first checked (step S20). This is done as follows. That is, first, the panel interface circuit 13 scans the operation panel 14 to capture panel data (hereinafter referred to as “new panel data”) indicating the current on / off state of each switch as a bit string corresponding to each switch.

Then, the panel data (hereinafter referred to as "old panel data") which has been previously read and already stored in the RAM 12 is compared with the above new panel data to check whether or not there is a different bit. Create a panel event map with the different bits turned on. The presence / absence of a switch event is determined by referring to this panel event map, and if there is even one bit that is turned on, it is determined that a switch event has occurred.

If it is determined in step S20 that there is no switch event, no processing is performed and the process returns from this switch event processing routine to return to step S12 of the main routine.

On the other hand, when it is determined that there is a switch event in step S20, it is checked whether or not the switch event is an automatic performance switch event (step S21). This is performed by checking whether or not the bit corresponding to the automatic performance switch in the panel event map created as described above is turned on.

If it is determined that there is an event of the automatic performance switch, it is checked whether or not the event is an on event (step S22). This is done by checking whether the bit corresponding to the automatic performance switch in the new panel data is on.

If it is determined that the event is an on event, the automatic performance flag is first set to "1" (step S23). The automatic performance flag is a flag defined in the RAM 12 and is used to store whether or not the electronic musical instrument is in the automatic performance mode. When this automatic performance flag is set to "1", the electronic musical instrument is switched to the automatic performance mode.

Next, the start processing of the time counter is performed (step S24). This is a process of starting the count-up operation of a time counter (not shown) built in the CPU 10. After that, the time counter is incremented at regular time intervals.

Then, an automatic performance start process is performed (step S25). This automatic performance start process is a process of setting the address (start address SA) of the automatic performance data memory 17 in which the automatic performance data of the music designated by the operation panel 14 is stored in the current pointer provided in the RAM 12. .

Here, the current pointer stores the current position of the automatic performance data, and is incremented each time the start address SA is set as an initial value and the processing for one automatic performance data is completed. Is. When the automatic performance start process is completed as described above, the process proceeds to step S28.

When it is determined in step S22 that the event of the automatic performance switch is not the on event,
The automatic performance flag is cleared to "0" (step S2)
6). By clearing this automatic performance flag to "0", the electronic musical instrument is switched from the automatic performance mode to the normal performance mode.

Then, the stop processing of the time counter is performed (step S27). This stops the count-up operation of the time counter (not shown) incorporated in the CPU 10.

The above processing (steps S22 to S27) for the automatic performance switch is completed, or the above-mentioned step S22 is completed.
When it is determined in 21 that there is no event of the automatic performance switch, processing for other switches is performed (step S28).

By this "other switch processing", for example, processing for each switch event such as a tone color selection switch, a volume control switch, a rhythm selection switch, a sound effect switch such as a reverb switch, etc. will be performed. Since each processing is not directly related to the gist of the present invention, detailed description will be omitted. When this "other switch process" is completed, the process returns from the switch event process routine and returns to step S12 of the main routine.

In the main routine, keyboard event processing is then performed (step S12). In this keyboard event process, the presence or absence of a keyboard event is first checked.
This is done as follows. That is, by scanning the keyboard device 16 with the keyboard interface circuit 15, key data (hereinafter referred to as “new key data”) indicating the pressed state of each key is fetched as a bit string corresponding to each key.

Then, the key data (hereinafter referred to as "old key data") that has been read last time and already stored in the RAM 12 is compared with the new key data, and it is checked whether or not there is a different bit. Create a key event map with the bit you want to turn on. The presence / absence of a keyboard event is determined by referring to this key event map. That is, if there is even one bit that is turned on in the key event map, it is determined that there is a keyboard event.

When it is determined that there is a keyboard event by referring to the key event map created above, keyboard event processing is performed. In the keyboard event process, in the case of a keyboard on event, a predetermined oscillator in the sound source 19 is assigned to the part defined for the keyboard event.

Then, based on the key number indicating the key having the on event, the initial touch data indicating the key pressing strength (speed), the tone color number, etc., for example, the waveform address, frequency data, envelope data, filter, etc. Coefficients and the like are generated and sent to the sound source 19. As a result, according to the above-described operation, the oscillator to which the sound source 19 is assigned emits a musical sound based on the above-mentioned data.

On the other hand, when there is an off event, the sound source 19 assigned to the key for which the off event occurred.
The internal oscillator is searched, and the sound is muted by sending the envelope data of the release.

When this keyboard event process is completed, an automatic performance process is then carried out (step S13). Details of this automatic performance process will be described later.

Next, other processing is performed (step S14). This “other processing” includes MIDI data transmission / reception processing and the like. After that, the process returns to step S11, and the same processing is repeated thereafter. Step S11
When an event based on a panel operation or a keyboard operation occurs in the process of repeatedly executing S14 to S14, various functions as an electronic musical instrument are exerted by performing a process corresponding to the event.

Next, details of the automatic performance process will be described with reference to the flowchart shown in FIG.

In the automatic performance process, it is first checked whether or not the automatic performance flag is "1" (step S3).
0). When it is determined that the automatic performance flag is "0", that is, in the normal performance mode, the process returns from this automatic performance processing routine without performing any processing and returns to step S14 of the main routine.

On the other hand, when it is determined that the automatic performance flag is "1", that is, the automatic performance mode is set, the automatic performance data is read (step S31). That is, C
The PU 10 retrieves only one piece of automatic performance data in the automatic performance data memory 17 indicated by the current pointer.
Then, it is checked whether or not there is an automatic performance event (step S32). This is done by comparing the step time included in the automatic performance data with the time value counted up by a time counter (not shown).

If it is determined that there is no automatic performance event, that is, the results of the comparison do not match, it is recognized that the timing of sounding or mute has not yet come, and this automatic performance is performed without performing the following processing. The process returns from the processing routine and returns to step S14 of the main routine.
In this case, the current pointer is not incremented and maintains its original state. Therefore, in step S31, the same automatic performance data will be read next time.

On the other hand, when it is determined that there is an automatic performance event, that is, the comparison results are the same, it is recognized that the sounding or mute timing has come, and then the automatic performance data is speaker select data. Whether or not it is checked (step S33). In this case, the current pointer is incremented. Therefore, in step S31, the next automatic performance data will be read next time.

If it is determined that the data is speaker select data, the speaker data is saved (step S34). That is, the speaker designation information contained in the 4th byte is set in the play buffer corresponding to the channel number "nH" contained in the 1st byte of the speaker select data.

As a result, when the automatic performance data having the channel number is executed, either the speaker of the group A or the speaker of the group B is selected as the speaker to be used. When the speaker data save process is completed, the process returns from the automatic performance process routine and returns to step S14 of the main routine.

If it is determined in step S33 that the automatic performance data is not speaker select data, it is then checked whether or not it is panpot select data (step S35). Here, if it is determined that the data is panpot select data, panpot data save is performed (step S36). That is, the panpot designation information contained in the 4th byte is set in the play buffer corresponding to the channel number "nH" contained in the 1st byte of the panpot select data.

Thus, when the automatic performance data having the channel number is executed, the volume balance of the left and right output channels is controlled according to the panpot designating information set in the play buffer, and the sound image is the panpot designating information. The localization is determined at the specified position. When this panpot data save processing is completed, the routine returns from this automatic performance processing routine and returns to step S14 of the main routine.

When it is determined in step S35 that the automatic performance data is not the panpot select data, it is then checked whether or not it is the note-on data (step S37).

If it is determined that the data is note-on data, sound generation processing is performed (step S38).
The details of this tone generation processing are shown in the flowchart of FIG.

In the tone generation processing, first, the waveform information is set (step S50). That is, based on the tone color information, the volume information, etc. set in the play buffer corresponding to the channel number “nH” included in the first byte of the note-on data, and the key number and velocity data etc. specified by the note-on data. , The waveform address of the musical tone waveform memory 18 in which the musical tone waveform data to be read out is stored, the frequency data designating the reading speed, the envelope data to be added to the read musical tone waveform data, the filter coefficient, etc. are generated and sent to the sound source 19. .

Next, speaker determination processing is performed (step S51). That is, the speaker designation information set in the play buffer corresponding to the channel number “nH” included in the first byte of the note-on data is sent to the sound source 19. As a result, the sound source 19 sends the generated digital musical tone signal to the output destination, that is, the D / A converter 20 or the D / A converter 20.
It is decided whether to send to the converter 21.

Then, a pan pot determination process is performed (step S52). That is, the sound source 1 outputs the panpot designation information set in the play buffer corresponding to the channel number “nH” included in the first byte of the note-on data.
Send to 9. As a result, the size of the envelope to be added to the digital tone signals for both the left and right channels is processed, and the sound image localization is determined.

Next, other information setting processing is performed (step S53). The other information includes, for example, a process of designating a sound effect such as reverb.

Next, a tone generation process is performed (step S5).
4). This tone generation process is a process of driving the sound source 19 to generate a predetermined musical tone based on the previously set information. That is, the oscillator to which the sound is assigned reads the musical tone waveform data from the musical tone waveform memory 18 and adds an envelope to this to generate a digital musical tone signal. The digital tone signal generated by the sound source 19 is converted into the D / A converter 20 according to the speaker select data.
Alternatively, it is sent to the D / A converter 21.

The D / A converter 20 or 21 converts the input analog musical tone signal into a digital musical tone signal and sends it to the amplifiers 22 and 23 or the amplifiers 24 and 25. The analog tone signals, which have been amplified by the amplifiers 22 to 25, are sent to the speakers 26 to 29. As a result, musical tones corresponding to the automatic performance data are emitted from the speakers 26 to 29. When this tone generation process ends, the automatic performance process routine returns and the process returns to step S14 of the main routine.

In the automatic performance processing routine, if it is determined in step S37 that it is not note-on data,
Then, it is checked whether or not it is note-off data (step S39). Then, when it is determined that the data is note-off data, the muffling process is performed (step S
40).

This mute processing is processing for searching the oscillator assigned to the musical sound for which note-off is instructed and sending release envelope data, as in the case of the key-off event in the above-mentioned keyboard event processing. This mutes the sound. Thereafter, the process returns from this automatic performance processing routine and returns to step S14 of the main routine.

If it is determined in step S39 that the data is not note-off data, other processing is performed (step S41). This "other processing" includes processing for automatic performance data other than the above-described automatic performance data, for example, tone color changing processing, volume changing processing, etc., but since it is not directly related to the present invention, description thereof is omitted. When this "other processing" ends, the routine returns from this automatic performance processing routine and returns to step S14 of the main routine.

As described above, according to this embodiment,
Either the speaker of the A group or the speaker of the B group is designated by the speaker designation information, and by the designated group,
A musical tone based on the stereo musical tone signal generated according to the automatic musical performance data stored in the automatic musical performance data memory 17 is emitted in stereo.

Therefore, the sound is emitted based on the automatic performance data created so that the sound image localization is different due to the stereo effect of the speaker pair of each group, so that a stereoscopic effect and a dynamic feeling similar to a live performance are provided. A sound image space can be created.

In the above embodiment, the speaker is designated and the pan pot is controlled based on the automatic performance data stored in the automatic performance data memory 17.
It is also possible to perform the performance by designating the speaker and controlling the panpot based on the MIDI data sent from the external device through the MIDI interface circuit 40.

In this case, speaker select and panpot select data is defined as one of the MIDI data, and this is set in the play buffer provided for each part to select the speaker used for sound generation and the panpot setting. Configure to do. The format of MIDI data can be configured as shown in FIG. 7B, for example.

It differs from the format of the automatic performance data shown in FIG. 9A in that it does not have step time information. However, this is because the received MIDI data is sequentially executed and the step time is This is because it is unnecessary. Other data is the same as the above-mentioned automatic performance data.

In the above embodiment, the speaker select and panpot select data are defined as one of the automatic performance data or MIDI data, and the contents of the play buffer are changed every time these data appear. Although the configuration is such that selection and panpot control are performed, speaker selection and panpot control can also be performed as follows.

That is, the speaker select data and panpot select data of each part (channel number) are stored as a table in the automatic performance data memory 17 in association with each automatic performance tune, and these are read at the start of the performance. And set it in the play buffer. According to such a configuration, data for speaker selection or panpot selection does not appear in the automatic performance data or MIDI data, so that there is an advantage that the processing becomes easy.

Further, in the above embodiment, the speaker used for sounding is determined by using the speaker select data, but the speaker used for sounding is determined by operating the switch of the operation panel 14. It may be configured. This is realized by rewriting the speaker designation information in the play buffer in accordance with the switch operation. With such a configuration, the sound image can be changed at the timing desired by the performer, regardless of the automatic performance data.

Further, with the configuration shown in FIG.
A digital signal processor (DSP) is provided between the A / A converters 20 and 21, or the D / A converters 20,
An analog filter may be provided between the amplifier 21 and the amplifiers 22 to 25 so as to exert various musical effects.

In this case, the musical tones reproduced in stereo by the speakers of the group A and the musical tones reproduced in stereo by the speakers of the group B should be different musical instrument sounds, and analog filters each having a predetermined frequency characteristic should be used. As a result, the sound image becomes clear and a more realistic performance becomes possible.

Next, an example of part allocation to each speaker will be shown below. Basically, an instrumental sound having a high range is assigned to the speaker of the A group, and an instrumental sound having a low range is assigned to the speaker of the B group. <Part><Group> Drum (main) B group B group B orchestra 1, 2 B group chords 1, 2 A + B group drum (sub) A group

As described above, the speaker 2 of the A group
The sound images of 6 and 27 are localized on the front side in the figure with respect to the line connecting both speakers 26 and 27. The sound images from the speakers 28 and 29 of the B group are both speakers 28 and 2
The localization is determined on the front side of the figure from the line connecting 9.

Therefore, when the same tone color data is assigned to the A and B groups, the two-dimensional localization can be determined by the localization and volume level of each group. In addition, the sound image is moved forward and backward according to the mixing ratio of each data,
By generating a chorus effect by making the pitches different, it is possible to create a spread in the diagonal back direction as shown in FIG.

Further, in the above embodiment, the A group and the B group are
Although the sound image is controlled by two sets of stereo reproduction systems such as groups, the sound image may be controlled by three sets or more of stereo reproduction systems.
With such a configuration, a more complicated sound field can be formed, so that a more realistic performance can be performed.

In the embodiment described above, the sound image is controlled by two sets of stereo reproduction such as the A group consisting of the two speakers 26 and 27 and the B group consisting of the two speakers 28 and 29. The four speakers 26 to 29 are arranged at predetermined four positions on the front, rear, left, right, and top and bottom of the player, and each speaker 26 to 29 generates an independent musical sound to control one sound image. May be.

In this case, the speaker specifying information of the speaker select data is defined so as to specify any one of the four speakers 26 to 29 independently, and the panpot specifying information of the panpot select data is the three-dimensional space. Define to specify the panpot position in.

According to such a configuration, an arbitrary sound image space can be created, and a powerful sound image having a three-dimensional effect and a dynamic feeling similar to a live performance can be obtained.

[0119]

As described in detail above, according to the present invention,
It is possible to provide an electronic musical instrument that has a stereoscopic effect and a dynamic feeling similar to a live performance, and can obtain a realistic sound image.

[Brief description of drawings]

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

FIG. 2 is a plan view and a side view showing an external appearance of an electronic musical instrument according to the present invention.

FIG. 3 is a flowchart (main routine) showing the operation of the embodiment of the present invention.

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

FIG. 5 is a flowchart (automatic performance processing routine) showing the operation of the embodiment of the present invention.

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

FIG. 7 is an explanatory diagram showing an example of formats of automatic performance data and MIDI data used in an embodiment of the present invention.

FIG. 8 is a diagram for explaining an example of a sound field when the embodiment of the present invention is applied.

[Explanation of symbols]

 10 CPU 11 Program Memory 12 RAM 13 Panel Interface Circuit 14 Operation Panel 15 Keyboard Interface Circuit 16 Keyboard Device 17 Automatic Performance Data Memory 18 Musical Sound Waveform Memory 19 Sound Source 20, 21 D / A Converter 22-25 Amplifier 26-29 Speaker 30 System Bus 40 MIDI interface circuit 50 Opening

Claims (2)

[Claims] 1. At least four sound emitting means for emitting a musical sound, designating means for designating any one of the four sound emitting means, storage means for storing automatic performance data, and storage in the storage means. Music tone signal generating means for generating a tone signal in accordance with the generated automatic performance data, and control means for giving the tone signal generated by the tone signal generating means to the sound emitting means designated by the designating means. An electronic musical instrument characterized by. 2. An electronic musical instrument having at least two speaker pairs for stereo reproduction of a musical sound, two of which are a pair, and a specifying means for specifying any one of the at least two speaker pairs, and an automatic performance. Data storing means, musical tone signal generating means for generating a pair of stereo musical tone signals according to the automatic performance data stored in the storing means, and a pair of stereo musical tone signals generated by the musical tone signal generating means. And a control means for giving the speaker pair designated by the designation means to the electronic musical instrument.