JP2983122B2 - Electronic musical instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument having a plurality of output systems.

[0002]

2. Description of the Related Art Conventionally, electronic musical instruments called electronic keyboards have been developed and put to practical use. Such an electronic keyboard has a one-channel or two-channel output system. That is, hardware from a sound source to a speaker (or an output terminal) and software for driving this hardware to generate a predetermined musical sound are configured to generate a maximum of 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 perform performance by stereo reproduction.

On the other hand, the above-mentioned electronic keyboard generally has an automatic performance function. By using this automatic performance function, the performance of a predetermined part is left to the automatic performance, and the player plays a specific part. It is possible to have a performance form called. For example, a performance mode in which a melody is played with the sound of a trumpet while automatically playing the musical tones of each part, such as a drum, bass, and piano, or a performance in which a melody is played with the sound of a specific instrument with the automatic accompaniment of an orchestra It can take the form.

[0005] The automatic performance function as described above is realized by using, for example, a multi sound source. That is, a sound source is assigned to each part, and the automatic performance data of each part stored in advance in a memory (or a sequencer) for automatic performance data is sequentially read out, and is sent to the allocated sound source to simultaneously generate sounds. Has been realized.

[0006]

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

[0007] In an electronic keyboard having a two-channel output system, sound image localization can be controlled by stereo reproduction, so that a performance full of a sense of reality can be performed. However, when playing back automatic performance data including a plurality of instrument sounds, such as in an orchestra, the sound image formed by the two-channel output system has a three-dimensional effect and a dynamic effect compared to a sound image in a live performance. There was a problem that the sound was poor and the sound seemed flat.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electronic musical instrument having a three-dimensional feeling and a dynamism similar to a live performance and capable of obtaining a sound image full of a sense of reality. Aim.

[0009]

To achieve the above object, an electronic musical instrument according to a first aspect of the present invention comprises at least four sound emitting means for emitting musical tones, and at least four of the four sound emitting means. Designation means for designating any one of them, storage means for storing automatic performance data, tone signal generation means for generating a tone signal according to the automatic performance data stored in the storage means, and tone signal generation means for Control means for supplying the generated tone signal to the sound emitting means specified by the specifying means.

[0010] For the same purpose, the second aspect of the present invention.
A designation unit electronic musical instrument, two is an electronic musical instrument having at least two sets of speaker pair stereo playback tone becomes a pair, to specify one of said at least two sets of speaker pairs according to an automatic Storage means for storing performance data, tone signal generation means for generating a pair of stereo tone signals in accordance with the automatic performance data stored in the storage means, and a pair of stereo tones generated by the tone signal generation means; Control means for providing a signal to the speaker pair designated by the designation means.

[0011]

In the electronic musical instrument according to the first aspect of the present invention, one of at least four sound emitting means is designated by the designating means, and the designated sound emitting means stores the sound in the storage means. The musical tone based on the musical tone signal generated according to the automatic performance data is emitted. As the designation means, for example, special data stored as one type of automatic performance data in the storage means, or an operation element 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, for example, front, rear, left, right, up, down, etc., and sound is emitted based on automatic performance data created according to the arrangement of the speakers. Therefore, an arbitrary sound image space can be created, and a sound image having a three-dimensional feeling and a sense of dynamism similar to a live performance can be obtained.

[0013] In the electronic musical instrument according to the second aspect of the present invention , any one of at least two pairs of speakers is provided.
A set of speaker pairs is designated by a designation unit, and the designated speaker pair emits in stereo a tone based on a stereo tone signal generated according to the automatic performance data stored in the storage unit. Also in this case, as the designation means, for example, special data stored as one type of automatic performance data in the storage means, or an operator provided on an operation panel or the like can be used.

Accordingly, 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 three-dimensional feeling and a lively feeling similar to a live performance. Can be produced.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an electronic musical instrument according to the present invention will be described below in detail with reference to the drawings, focusing on the configuration and operation of a portion related to an output system related to the features of the present invention. In addition,
In the present embodiment, the part of “16” (a control unit for generating one musical tone, corresponding to 16 MIDI channels) and the output channel of “4” (channel for emitting sound) Although it is described as having, it is not limited to this.

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of an electronic musical instrument according to 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 includes, for example, an address line,
A bus line composed of a data line, a control signal line, and the like, which is used for transmitting and receiving various data between the above-described components. This system bus 30 has a CP
U10 and the sound source 19 are used in time division.

The CPU 10 includes a program memory 11
In accordance with a control program stored in the electronic musical instrument. For example, the CPU 10
A tone 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. , Frequency data, envelope data, filter coefficients, and the like are generated and sent to the sound source 19 to generate a predetermined tone.

The CPU 10 reads out automatic performance data from the automatic performance data memory 17 via the system bus 30, performs a predetermined conversion on the automatic performance data, and
To perform a predetermined automatic performance by sending the sound to the sound source 19 via the.

The CPU 10 has a built-in time counter for automatic performance. The operation of the time counter is started by a predetermined start command, and thereafter, the time counter performs a count-up operation at a constant cycle. This time counter is used for detecting 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. Examples of the external device include a personal computer, a sequencer, and other electronic musical instruments that process MIDI data.

The program memory 11 has, for example, an RO
M, in which a control program for operating the above-described CPU 10 is stored.
Various fixed data used by U10 for various processes are stored.

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

The RAM 12 temporarily stores various data used for executing 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
Is used to instruct the electronic musical instrument to perform various operations. For example, as shown in an external plan view of FIG. 2, the electronic musical instrument is disposed substantially at the center of the electronic musical instrument. This operation panel 1
4 is provided with, for example, various switches and a display.

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

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

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

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

The panel interface circuit 13 controls transmission and 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 indicating ON / OFF of each switch returned from the operation panel 14 in response to the scan signal.

Then, based on this signal, each switch is turned on / off.
Generate panel data that corresponds to OFF 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 or absence of a panel event (details will be described later).

Further, the panel interface circuit 13 includes:
The display data sent from the CPU 10 via the system bus 30 is sent to the operation panel 14. As a result, a change of the display content of the LCD display provided on the operation panel 14 or the turning on / off of the LED display is performed.

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

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

Then, from the received signal, key data and initial touch data in which each key is turned on / off in correspondence 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 are used to determine the presence or absence of a keyboard event. Then, on the basis of the result of this determination, a sounding / silencing process is performed in response to a key press or a key release of the keyboard device 16.

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

The automatic performance data is configured so that automatic performance (two sets of stereo performances) can be performed by four output channels for each part of the automatic performance music. FIG.
(A) shows an example of the data format of “speaker select” and “panpot select” which are the automatic performance data according to the feature of the present invention.

The automatic performance data of "speaker select" corresponds to the designating means and is composed of 4 bytes. The automatic performance data of the speaker select is used to specify a speaker to be used for sound generation. The first byte of the speaker select data indicates a status “BH” (｀ H ′ indicates 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 indicates whether the tone is a drum tone or a tone other than a drum tone. It is recognized that “speaker select” is performed by the upper byte of the data of the third byte and the data of the first byte. The fourth byte is used as speaker designation information for designating a speaker to be used for sound emission. In the case of the present embodiment, the value of the fourth byte is “00”.
H-3FH ”, the speaker of group A (speaker 2
6 and 27), and in the case of “40H to FFH”, the speakers of the B group (speakers 28 and 29) are specified.

The automatic performance data of "Panpot Select" is composed of 4 bytes and is used to determine the sound image localization of a pair of speakers. The first and second bytes of the panpot select data are the same as those of the speaker select. The third byte is a part of the status. The third byte data and the upper 4 bytes of the first byte data
The bit is recognized as “pan pot select”.

The fourth byte is panpot designation information for designating the position of the panpot, and only the upper four bits are used. Accordingly, 16 sound image localizations can be designated for each part.

By executing the automatic performance data of the speaker select and the pan pot select, the speaker designation information and the pan pot designation information are set in the play buffer. Here, the play buffer is a buffer provided for each part, and stores various kinds of control information for each part, that is, for each tone, such as timbre information, volume information, etc., in addition to the speaker designation information and panpot designation information. .

Which play buffer to set is determined by
It is designated by the channel number “n” included in the automatic performance data. The contents of the 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 sound source 19 in an automatic performance process described later, and sent to the sound source 19.

It should be noted that 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. For example, when the power of the electronic musical instrument is turned on, the automatic performance data is read from a floppy disk mounted in the floppy disk device. What is necessary is just to comprise so that it may load into RAM12.

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

The sound source 19 corresponds to a tone signal generating means, and includes, 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 sounding channels (oscillators) are assigned to one part.

The oscillator to which the tone is assigned reads out the tone waveform data for both the left and right channels stored in the tone waveform memory 18 in a time-division manner, and stores the envelope in accordance with the panpot information stored in the play buffer. In addition, digital tone signals for both the left and right channels are generated in a time-division manner.

The digital tone signal for both the left and right channels generated in a time-division manner by the sound source 19 is supplied to 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 tone signal into an analog tone signal, and separates and outputs the right channel analog tone signal and the left channel analog 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 analog tone signal for the right channel at a predetermined amplification factor and outputs the amplified signal. 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 factor and outputs the amplified signal. 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 tone signal into an analog tone signal, and separates and outputs a right channel analog tone signal and a left channel analog tone signal. The analog tone signal for the right channel converted and separated by the D / A converter 21 is sent to the amplifier 24, and the analog tone signal for the left channel is sent to the amplifier 25.

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

The loudspeakers 26 to 29 correspond to sound emitting means, and are well known for converting an analog musical tone signal as an electric signal into an acoustic signal. This speaker 26 ~
As a result, a tone corresponding to the depression of the 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 view showing an example of the arrangement 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
Reference numeral 7 denotes an operation panel 1 provided substantially at the center of the electronic musical instrument.
4 are provided at both ends in such a manner as to be inclined forward 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 near side in the figure with respect to the line connecting the speakers 26 and 27.

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

With such a speaker arrangement, the sound image localization formed by the stereo reproduction by the speakers of Group A and the sound image localization formed by the stereo reproduction by the speakers of Group B are separated back and forth, thereby realizing a sound field with a sense of depth. It can be done.

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

FIG. 3 is a flowchart showing a main routine of the electronic musical instrument, which is started when the power is turned on.
That is, when the power is turned on, first, an initialization process 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 initial values to registers, counters, flags, and the like defined in the RAM 12. In this initialization process, the sound source 1
A predetermined data is transmitted to the power supply 9 to prevent unnecessary sound from being generated when the power is turned on.

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

In the switch event processing, first, the presence or absence of a switch event is checked (step S20). This is performed as follows. That is, first, the operation panel 14 is scanned by the panel interface circuit 13 to acquire 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.

Next, panel data previously read and stored in the RAM 12 (hereinafter referred to as "old panel data") is compared with the new panel data to determine whether or not there is a different bit. Create a panel event map with different bits turned on. The presence / absence of a switch event is determined by referring to the panel event map. If at least one bit is ON, it is determined that a switch event has occurred.

If it is determined in step S20 that there is no switch event, the process returns from the switch event processing routine without any processing and returns to step S12 of the main routine.

On the other hand, if it is determined in step S20 that a switch event has occurred, it is checked whether the switch event is an event of an automatic performance switch (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 on.

Here, when 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, first, the automatic performance flag is 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 the automatic performance flag is set to "1", the electronic musical instrument is shifted to the automatic performance mode.

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

Next, automatic performance start processing 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. .

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

If 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 the automatic performance flag to "0", the electronic musical instrument is shifted from the automatic performance mode to the normal performance mode.

Next, stop processing of the time counter is performed (step S27). This means that the count-up operation of a time counter (not shown) built in the CPU 10 is stopped.

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

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

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

Next, the key data previously read and stored in the RAM 12 (hereinafter referred to as "old key data") is compared with the new key data to determine whether or not there is a different bit. Create a key event map with the bit to turn on. The determination of the presence / absence of a keyboard event is made by referring to this key event map. That is, if there is at least one bit that is on in the key event map, it is determined that a keyboard event has occurred.

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

Next, based on the key number indicating the key having the ON event, the initial touch data indicating the strength (speed) of pressing the key, the tone number, and the like, for example, waveform address, frequency data, envelope data, filter Coefficients and the like are generated and sent to the sound source 19. Thus, by the above-described operation, the tone assigned to the tone generator 19 is generated based on the data.

On the other hand, if there is an off event, the sound source 19 assigned to the key having the off event
The oscillator inside is searched, and silence is performed by sending the envelope data of the release.

When the keyboard event process is completed, an automatic performance process is performed (step S13). Details of the automatic performance processing will be described later.

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

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

In the automatic performance processing, first, it is 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, the normal performance mode is set, the process returns from the automatic performance processing routine without 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 extracts only one piece of automatic performance data from the automatic performance data memory 17 indicated by the current pointer.
Next, the presence or absence of an automatic performance event is checked (step S32). This is performed by comparing a step time included in the automatic performance data with a time value counted up by a time counter (not shown).

Here, if it is determined that there is no automatic performance event, that is, the result of the comparison does not match, it is recognized that the sounding or silencing timing has not yet been reached, and this automatic performance event is performed without performing the following processing. It returns from the processing routine and returns to step S14 of the main routine.
In this case, the current pointer maintains the original state without being incremented. Therefore, in step S31, the same automatic performance data is read out next time.

On the other hand, if it is determined that there is an automatic performance event, that is, it is determined that the above-mentioned comparison results match, it is recognized that the sound generation or mute timing has arrived, and then whether the automatic performance data is the speaker select data or not. It is checked whether it is (Step S33). In this case, the current pointer is incremented. Therefore, in step S31, the next automatic performance data is read next time.

If it is determined that the data is speaker select data, speaker data saving is performed (step S34). That is, the speaker designation information included in the fourth byte is set in the play buffer corresponding to the channel number “nH” included in the first byte of the speaker select data.

As a result, when the automatic performance data having the channel number is executed, one of the speakers in the group A and the speakers in the group B is selected as the speaker to be used. When the speaker data saving 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, then it is checked whether or not the automatic performance data is panpot select data (step S35). If it is determined that the data is panpot select data, panpot data saving is performed (step S36). That is, the panpot designation information included in the fourth byte is set in the play buffer corresponding to the channel number “nH” included in the first 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 designation information set in the play buffer, and the sound image is represented by the panpot designation information. The localization is determined at the specified position. When the panpot data save processing is completed, the process returns from the automatic performance processing routine and returns to step S14 of the main routine.

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

Here, when it is determined that the data is note-on data, a tone generation process is performed (step S38).
Details of the sound generation process are shown in the flowchart of FIG.

In the sound generation process, first, waveform information is set (step S50). That is, based on tone color information, volume information, and the like set in the play buffer corresponding to the channel number “nH” included in the first byte of the note-on data, key number and velocity data specified by the note-on data, and the like. A waveform address of the tone waveform memory 18 storing tone waveform data to be read, frequency data designating a reading speed, envelope data to be added to the read tone waveform data, a filter coefficient, and the like 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 tone signal to the output destination, that is, the D / A converter 20 or the D / A converter 20.
It is determined whether to send to the converter 21.

Next, a pan pot determination process is performed (step S52). That is, 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 is transmitted to the sound source 1
Send to 9. As a result, the size of the envelope to be attached to the digital tone signal 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, processing for 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 generating a predetermined musical tone based on each information set previously by driving the sound source 19. That is, the oscillator to which the sound is assigned reads out the musical tone waveform data from the musical tone waveform memory 18 and adds an envelope thereto to generate a digital musical tone signal. The digital tone signal generated by the sound source 19 is converted into a 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 tone signal into a digital tone signal and sends it to the amplifiers 22 and 23 or the amplifiers 24 and 25. In the amplifiers 22 to 25, the analog tone signals subjected to predetermined amplification are sent to speakers 26 to 29. As a result, a tone corresponding to the automatic performance data is emitted from the speakers 26 to 29. When the sound generation process is completed, the process returns from the automatic performance process routine and returns to step S14 of the main routine.

In the automatic performance processing routine, if it is determined in step S37 that the data is not note-on data,
Next, it is checked whether the data is note-off data (step S39). When it is determined that the data is note-off data, a mute process is performed (step S).
40).

This silencing process is a process of searching for the oscillator assigned to the musical tone for which note-off has been instructed, and transmitting the release envelope data, as in the case of the key-off event in the keyboard event process described above. Thereby, the sound is muted. Thereafter, the process returns from the 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). The “other processing” includes processing for automatic performance data other than the above-described automatic performance data, for example, tone color change processing, volume change processing, and the like, but is not directly related to the present invention, and a description thereof will be omitted. When the "other processing" is completed, the routine returns from the 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 group A or the group B is designated by the speaker designation information, and by the designated group,
A tone based on a stereo tone signal generated according to the automatic performance data stored in the automatic performance data memory 17 is emitted in stereo.

Accordingly, 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 the speaker pair of each group, it has a three-dimensional feeling and dynamism close to that of a live performance. A sound image space can be created.

In the above embodiment, the speaker is specified 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 adopt a configuration in which a performance is performed by designating a speaker or controlling a pan pot based on MIDI data sent from an external device via the MIDI interface circuit 40.

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

The format of the automatic performance data shown in FIG. 11A is different in that it does not have the step time information. However, since the received MIDI data is executed sequentially, the step time is different. This is because it is unnecessary. The other data is the same as the automatic performance data described above.

In the above embodiment, speaker select data and panpot select data are defined as one of the automatic performance data and the MIDI data, and the contents of the play buffer are changed each time these data appear to change the contents of the play buffer. Although selection and panpot control are performed, speaker selection and panpot control can also be performed as follows.

That is, speaker select data and panpot select data of each part (channel number) are stored in the automatic performance data memory 17 as a table, for example, in association with each automatic performance music, and are read out at the start of the performance. To be set in the play buffer. According to such a configuration, since data for speaker selection or panpot selection does not appear in the automatic performance data or MIDI data, there is an advantage that processing is facilitated.

Further, in the above embodiment, the speaker to be used for sound generation is determined by using the speaker select data. However, the speaker to be used for sound generation is determined by operating the switch on the operation panel 14. You may comprise. This is realized by a configuration in which the speaker designation information in the play buffer is rewritten in accordance with a switch operation. According to such a configuration, the sound image can be changed at a timing desired by the player regardless of the automatic performance data.

Further, in the configuration shown in FIG.
A digital signal processor (DSP) is provided between the D / A converters 20 and 21;
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 sound reproduced in stereo by the speakers of Group A and the musical sound reproduced in stereo by the speakers of Group B are converted into different musical instrument sounds, and analog filters having predetermined frequency characteristics are used. As a result, the sound image becomes clear, and a more realistic performance can be performed.

Next, an example of part assignment to each speaker will be described below. Basically, a musical instrument sound having a high frequency range is allocated to the speakers of Group A, and a musical instrument sound having a low frequency range is allocated to the speakers of Group B. <Part><Group> Drum (Main) B Group Bass B Group Orchestra 1, 2 B Group Code 1, 2 A + B Group Drum (Sub) A Group

As described above, the speaker 2 of group A
The localization of the sound images 6 and 27 is determined on the near side in the figure from the line connecting the speakers 26 and 27. The sound image by the speakers 28 and 29 of the B group is
The localization is determined on the near side in the figure from the line connecting 9.

Therefore, when the same timbre data is assigned to the groups A and B, a two-dimensional localization can be determined by the localization and the volume level of each group. Also, the sound image is moved in the front-back direction according to the mixing ratio of each data,
By generating the chorus effect by making the pitch different, it is possible to create a diagonal extension in the depth direction as shown in FIG.

In the above embodiment, the A group and the B group
Although the sound image is controlled by two sets of stereo reproduction systems such as groups, the sound image may be controlled by three or more sets of stereo reproduction systems.
According to such a configuration, a more complex 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 regenerating systems, such as an A group including two speakers 26 and 27 and a B group including two speakers 28 and 29. The four loudspeakers 26 to 29 are arranged at predetermined four positions in front, back, left, right and up and down of the player, and each loudspeaker 26 to 29 generates an independent musical sound to control one sound image. May be.

In this case, the speaker designation information of the speaker select data is defined so as to independently designate any one of the four speakers 26 to 29, and the panpot designation information of the panpot select data is a three-dimensional space. Is defined 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 feeling and a lively 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 having a three-dimensional feeling and a lively feeling similar to a live performance and capable of obtaining a sound image full of a sense of reality.

[Brief description of the drawings]

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

FIGS. 2A and 2B are 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) illustrating 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) illustrating the operation of the embodiment of the present invention.

FIG. 7 is an explanatory diagram showing an example of a format of automatic performance data and MIDI data used in the 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]

 Reference Signs List 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)

(57) [Claims] Claims: 1. At least four sounds for emitting musical sounds
Speaker and speaker select data for selecting the speaker.
Storage means for storing automatic performance data for each part ; and speaker selection data read from the storage means.
A speaker for generating the tone of the corresponding part
The speaker set is selected from at least four speakers.
Designation means for designating on the basis of the automatic performance data read from the storage means;
Signal generating means for generating a tone signal for each part , and control means for supplying the tone signal of each part generated by the tone signal generating means to a speaker designated by the designation means. An electronic musical instrument, comprising: 2. A musical tone is stereo-reproduced as a pair of two.
DoAt least two speaker pairs for Speaker select data for selecting a speaker pair
Automatic performance data including each part Storage means;The speaker select data read from the storage means
A speaker pair for generating the musical sound of the corresponding part,
From the at least two speaker pairs,
Specify based on current data Designation means;Based on the automatic performance data read from the storage means
The tone signal for each part Music signal generating means;The tone signal of each part generated by the tone signal generating means is
Supply to the speaker pair specified by the specifying means Control hand
An electronic musical instrument comprising: a step;