JPH07140975A - System and method for controlling synchronization of electronic instrument - Google Patents

Abstract

PURPOSE:To surely perform the synchronous operation control among plural electronic instruments by transmitting/receiving a request command, a confirmation command and an execution command related to required control among the electronic instruments. CONSTITUTION:Respective commands are transmitted between the electronic instrument MASTER and the electronic instrument SLAVE.1, between the SLAVE.1 and the SLAVE.2,... and between the SLAVE.M and the SLAVE.END. When the required control is instructed by the MASTER, the request command is sent and received by the SLAVE.1, and when the control is executed by the SLAVE.1, the recognition command is sent to the MASTER. The MASTER executes the required control responding to the reception of the recognition command and sends the execution command. The SLAVE.1 executes the required control responding to the reception of the execution command. Thus, the required control are executed while synchronizing among respective electronic instruments based on the transmission/reception of these three kinds of commands.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous control system and method for an electronic musical instrument, which is capable of synchronously controlling a plurality of electronic musical instruments.

[0002]

2. Description of the Related Art Conventionally, it has been known to connect a plurality of electronic musical instruments and to synchronously control another electronic musical instrument connected by a command from one electronic musical instrument (for example, synchronized automatic performance of a plurality of electronic musical instruments). There is. In the conventional system, when the master side gives a control instruction, the master side transmits the control instruction regardless of the state of the slave side, and once the transmission is completed, whether or not the control instructed by the slave side has been performed. Regardless, he started to control himself.

[0003]

Therefore, if the slave cannot follow the control instruction, the control intended by the performer cannot be performed, and even if the control becomes possible, the control is not performed and the control is not performed. However, even though the electronic musical instrument was instructed to, the connected electronic musical instrument was not controlled. That is, there is a drawback in that synchronization control between a plurality of electronic musical instruments becomes uncertain.

For example, in a case where an attempt is made to synchronously reproduce a certain piece of music in performance data in which a plurality of pieces of music are sequentially stored by two electronic musical instruments, if the slave side is still reproducing the previous piece of music, Even if the master side instructed to play back, the slave still played the previous song, while the master side had its own start. After that, even if the slave side can play the music that should be generated in synchronization, the master side does not give an instruction again, so the desired music is not played. The present invention has been made in view of the above points, and it is an object of the present invention to provide a synchronous control system and method for an electronic musical instrument, which enables reliable synchronous operation control among a plurality of electronic musical instruments.

[0005]

A control system for an electronic musical instrument according to a first invention of this application relates to at least the control based on a control instruction means for instructing desired control and a control instruction by the control instruction means. A first electronic musical instrument having a transmitting means for transmitting a request command and an execution command, a receiving means for receiving at least a confirmation command, and an executing means for executing the desired control, and a transmitting means for transmitting at least a confirmation command. A second electronic musical instrument having at least a receiving means for receiving a request command and an execution command, an executing means for executing the desired control, and a transmitting means, and the first and second electronic musical instruments. Means for transmitting the command between the electronic musical instruments via the respective transmitting means and receiving means in When the desired control instruction is given by the control instruction means, the request command is transmitted from the first electronic musical instrument, and the second electronic musical instrument responds to the request command received by the second electronic musical instrument. If the electronic musical instrument is capable of executing the desired control, if possible, the confirmation command is transmitted, and in response to the receipt of the confirmation command by the first electronic musical instrument, the confirmation command is transmitted. The execution means of the first electronic musical instrument executes the desired control and sends the execution command, and the execution means of the second electronic musical instrument responds to the reception of the execution command by the second electronic musical instrument. And a synchronization control means for executing the desired control according to the first electronic musical instrument, and the desired control is performed in synchronization with the first electronic musical instrument and the second electronic musical instrument.

A control system for an electronic musical instrument according to a second aspect of the present application is a system for controlling a plurality of electronic musical instruments in synchronization with each other, and each electronic musical instrument directs a desired control. Instructing means, transmitting means for sending a request command, confirmation command and execution command relating to the control to another electronic musical instrument, and reception for receiving request command, confirmation command and execution command from another electronic musical instrument Means for transmitting the command between the electronic musical instruments via the transmitting means and the receiving means in each of the electronic musical instruments, wherein each electronic musical instrument has its own electronic musical instrument When there is a control instruction from the control instruction means, a request command is sent to another electronic musical instrument, and then a confirmation command from the other electronic musical instrument is sent. Waiting for the reception of the confirmation command and executing the desired control in its own electronic musical instrument in response to the reception of the confirmation command and sending an execution command to the other electronic musical instrument, while the other electronic musical instrument requests the command. When the electronic musical instrument receives the desired control, it sends a confirmation command to the other electronic musical instrument if the desired control can be performed, and then responds to the execution command received from the other electronic musical instrument. The electronic musical instrument of (1) is provided with a synchronization control means for executing the desired control.

In the synchronous control method for a plurality of electronic musical instruments according to the third invention of this application, each electronic musical instrument sends a request command, a confirmation command and an execution command relating to predetermined control to another electronic musical instrument. And a receiving unit that receives a request command, a confirmation command, and an execution command from another electronic musical instrument, and an executing unit that executes the predetermined control, and the transmitting unit and the receiving unit for each of the electronic musical instruments. A means for transmitting the command between the electronic musical instruments via means, and when it is instructed to perform the predetermined control in any first electronic musical instrument of the electronic musical instruments, Sending a request command relating to the control from the first electronic musical instrument to another electronic musical instrument; Sending a confirmation command according to the state of whether or not the predetermined control relating to the request command can be executed in the electronic musical instrument of its own in response to the signal, Executing the predetermined control in response to receiving the confirmation command from the electronic musical instrument and transmitting the execution command to the other electronic musical instrument; and receiving the execution command in the other electronic musical instrument. Responsive to the step of executing the predetermined control.

[0008]

According to the above-mentioned first invention, when a desired control instruction is given by the first electronic musical instrument, the first electronic musical instrument does not immediately execute the control, but first the request command is issued. Send out. When the second electronic musical instrument receives the request command for the desired control transmitted from the first electronic musical instrument, the second electronic musical instrument sends a confirmation command to the first electronic musical instrument if the second electronic musical instrument can execute the control. Send to the instrument.
The first electronic musical instrument executes the desired control and sends out the execution command in response to the reception of the confirmation command. The second electronic musical instrument executes the desired control in response to the reception of the execution command. Therefore, based on the transmission / reception of these three types of commands, desired control can be surely executed in synchronization with each electronic musical instrument.

Also in the second and third inventions,
Similarly, based on the transmission and reception of the above-mentioned three types of commands, desired control can be surely executed in synchronization with each of the plurality of electronic musical instruments.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration example of one electronic musical instrument used in an embodiment of a synchronous control system for an electronic musical instrument according to the present invention. In this figure, 1 is a CPU (central processing unit), and a bus line 2
It is connected to each part of the device via. 3 is a CPU (read only memory), 4 is a RAM for storing various data
(Random access memory). Reference numeral 5 denotes a musical sound generation unit, which forms a musical sound signal based on performance data supplied via the CPU 1 and supplies it to the speaker 7 via the amplifier 6. 8 is an input console, a play switch,
It has a stop switch, a record switch, and other control switches. 9 is a keyboard. The keyboard 9 is provided with a key switch for detecting a key operation and a keying strength detector for detecting a keying strength corresponding to each key (key), and outputs of the key switches and the keying strength detector are respectively output. It is supplied to the key data generator 10. The key data generator 10 detects the key in the ON state by scanning the output of each key switch of the keyboard 9, and outputs the key code and keystroke strength data of the key to the bus line 2. The floppy disk 11 sequentially stores performance data supplied from the CPU 1 via the disk controller 12.

In the above construction, when the performance data is recorded on the floppy disk 11, the CPU 1 keeps the key code and the key-strength data output from the key data generator 10 in accordance with the operation of the keyboard 9 by the player. Is read at a sampling cycle of 1, performance data is created based on the read data, and the performance data is sequentially written in the RAM 4. When a certain amount of performance data is written in the RAM 4, the performance data is transferred to the floppy disk 11 via the disk controller 12. Also in this case,
The CPU 1 sequentially supplies the key code and the keystroke strength data output from the key data generator 10 to the musical tone generator 5. As a result, a musical sound corresponding to the operation of the keyboard 9 is generated from the speaker 7. On the other hand, when reproducing the performance data recorded on the floppy disk 11, the CPU 1 reads the performance data recorded on the floppy disk 11 and sequentially supplies it to the musical tone generating section 5. As a result, a reproduced musical sound is generated from the speaker 7.

However, the above-mentioned parts are the same as those of the conventional electronic musical instrument. By the way, the electronic musical instrument shown in FIG. 1 is provided with asynchronous communication interface adapters ACIA.I and ACIA.II for arranging a plurality of the electronic musical instruments in parallel and performing synchronous operation in addition to the above configuration. Has been. Next, these ACIA I and II will be described. ACIA.I and II are well known, for example, as MC6850 manufactured by Motorola, Inc., and their data lines, interrupt terminals, etc. are connected to the bus line 2, and their transmission data terminals, reception data terminals, DC
The D (Data Carrier Detect) terminal or the like is the terminal T1 (or T
2) connected to. Then, the command or data supplied from the CPU 1 is temporarily stored in the internal transmit data register, and then serially output from the transmission data terminal, and the serial data (or command) supplied to the receive data terminal is internally stored. After being temporarily stored in the receive data register, it is output to the bus line 2 as 8-bit parallel data. In addition, the CPU 1 detects the connection state with other electronic musical instruments depending on whether the DCD terminals of ACIA.I and II are at "H" level as described later.

FIG. 2 is a diagram showing a plurality of the above-described electronic musical instruments arranged side by side. Hereinafter, for convenience of explanation, the leftmost electronic musical instrument will be referred to as MASTER, and SLAVE
1, SLAVE ・ 2 ... SLAVE ・ M, and the rightmost electronic musical instrument is END ・ SLAVE. Also, MA
Let STER be the top electronic musical instrument and END / SLAVE the lowest electronic musical instrument.

In FIG. 2, the master ACIA
・ II is connected to ACIA ・ I of SLAVE ・ 1, and SL
ACIA / II of AVE / 1 is ACIA / II of SLAVE / 2
・ Connected to I ... SLAVE ・ M ACIA ・ II
Is connected to ACIA I of END SLAVE. As a result, between MASTER and SLAVE.1, between SLAVE.1 and SLAVE.2, ..., S
Commands are transmitted between LAVE.M and END.SLAVE, respectively. In this embodiment, no data is transmitted by each electronic musical instrument.
The DCA terminal of MASTER ACIA / II is SL.
Pulled up to "H" level in AVE-1
SLAVE / 1 ACIA / I DCD terminal is MAST
Pulled up in the ER, SLAVE-1 AC
The DCD terminal of IA / II is pulled up in SLAVE / 2, ..., ACIA / I of END / SLAVE
The DCD terminal of is pulled up in SLAVE-M. On the other hand, the DCD terminal of ACIA.I of MASTER and the DCD terminal of ACIA.II of END.SLAVE are not pulled up. And this D
Depending on the connection of the CD terminal, the CPU 1 in each electronic musical instrument may be the CPU of the MASTER itself or SLAVE-1 to SLAV.
EM / M CPU or END / SLAVE C
It can detect whether it is a PU.

Next, the operation of each electronic musical instrument when the electronic musical instruments shown in FIG. 2 are synchronously operated will be described with reference to FIGS. For convenience of explanation, it is assumed that there is one SLAVE. (1) MASTER and SL in STOP status
AVE and END / SLAVE are simultaneously set to the PLAY (musical tone reproduction) state (FIG. 3). In this case, the operator must
The play switch provided on the input console 8 of the ER is operated. When the play switch is operated, MAS
The TER CPU 1 detects this and sends the command PRQ (Pl
ay request) to ACIA.II and a PLAY preparation command to the disk controller 12. A
When command PRQ is supplied to CIA · II, ACIA
-II converts this command into serial data, outputs it from the transmission data terminal, and supplies it to the ACIA.I reception data terminal of SLAVE.

When the command PRQ is supplied to the reception data terminal of the ACIA.I of SLAVE, the ACIA.I sequentially reads the command PRQ into the internal receive data register, and when the reading is completed, the interrupt signal is sent. Output to CPU1. The CPU 1 receives this interrupt signal, reads the command PRQ from ACIA.I, and decodes the read command. When the CPU 1 decodes the read command as the command PRQ, it first outputs the command PRQ to the ACIA.I of END.SLAVE via the ACIA.II, and then outputs the PLAY preparation command to the disk controller 12. . END / SLA
When the command PRQ is supplied to the ACIA I of VE,
This command PRQ is read and decoded by the END / SLAVE CPU 1. Then, the CPU 1 outputs a PLAY preparation command to the disk controller 12 based on the decoding result. No electronic musical instrument is connected under END / SLAVE.
The AVE CPU 1 never outputs the command PRQ.

Next, when the END / SLAVE disk controller 12 completes the PLAY preparation, it outputs a completion signal to the CPU 1. CPU1 receives this completion signal,
A command PEB (Play enable) is transferred to ACIA · II of SLAVE via ACIA · I. This command PEB is read and decoded by the CPU 1 of SLAVE. Next, the SLAVE CPU 1 immediately sends the PLAY ready signal from the disk controller 12 at this point, and if not, waits for the READ ready signal and sends the command PEB via ACIA.I to the MASTER AC.
Transfer to IA / II. This command PEB is MASTE
It is read by the CPU 1 of R and decoded. And MAS
At this point, the TER CPU has the disk controller 1
If the PLAY ready signal from 2 arrives, immediately, if not, wait for arrival and wait for command PST (Play s
tart) is output to SLAVE via ACIA · II, and then a start command is output to the disk controller 12.

Thereafter, the performance data recorded on the master floppy disk 11 is sequentially read out, and CP
It is supplied to the musical sound generating unit 5 via U1, and thereby a reproduced musical sound is generated from the speaker 7. When the command PST is supplied to SLAVE, the CPU 1 of SLAVE
Reads and decodes this command PST. Then, based on this decoding result, the command PST is sent to END / SLA.
It outputs to VE and then outputs a start command to the disk controller 12. As a result, the musical sound reproduction of SLAVE is started. When the command PST is supplied to END / SLAVE, the CP of END / SLAVE
U1 reads this command PST, decodes it, and outputs a start command to the disk controller 12 based on the result of this decoding. As a result, END / SLAVE tone generation is started. In this way, the musical sound reproduction of the three electronic musical instruments is started at substantially the same time. Here, if the speed of command transmission between each ACIA is 9600 baud and each command is composed of 8 bits, the transmission delay between each electronic musical instrument is about 1 msec. It is possible to start the musical sound reproduction of the electronic musical instrument.

(2) MASTER in STOP state,
SLAVE in the STOP state and END / SLAVE in the REC / WAIT (recording waiting) state are simultaneously in the PLAY state, the PLAY state, and the REC / PLAY state.
When in the (data recording) state (Fig. 4). In this case, the operator puts MASTER and SLAVE into the STOP state in advance, and presses the END / SLAVE record switch to set END / SLAVE to REC / WAIT.
State. And when you press the play switch,
Command transfer similar to that in the case of FIG. 3 is performed, whereby MASTER, SLAVE, and END / SLAVE are brought into the PLAY state, the PLAY state, and the REC / PLAY state at substantially the same time. In addition, in FIG. 5, the MASTER / REC / PLA
FIG. 7 is an operation explanatory diagram when the Y state, SLAVE, and END / SLAVE are in the PLAY state, and the command transfer in this case is the same as that in the case of FIG. 3.

(3) When the three musical tones of the electronic musical instruments are all playing the N-th musical tone and the musical tone reproduction of the N-th musical tone of each electronic musical instrument ends at different times, the respective electronic musical instruments In the case where the musical tone reproduction of the (N + 1) th song is simultaneously started (FIG. 6). Now, it is assumed that the musical tone reproduction of the Nth tune of SLAVE is completed first (PLAY / END).
In this case, SLAVE sends the command ERQ (End reques
t) and PRQ (Play request) are sequentially END / SL
Output to AVE. The END / SLAVE CPU 1 reads and decodes the commands ERQ and PRQ.
Then, since the musical sound reproduction in END / SLAVE is currently in progress, the PRQ flag in the RAM 4 is set based on the decoding result of the command PRQ, and the command processing is ended. The command ERQ is REC / PL
This command is valid only in the AY state and is ignored in this case. Next, when the reproduction of the musical sound of MASTER is completed, the commands ERQ and PRQ are output from MASTER to SLAVE. SLAVE CP
U1 reads and decodes these commands ERQ and PRQ. In this case, since the command PEB has not arrived from END / SLAVE, the PR in the RAM 4 is
Set the Q flag. Next, if the reproduction of the musical sound of END / SLAVE is finished, the CPU 1 of END / SLAVE checks the PRQ flag in the RAM 4. In this case, since the PRQ flag is set, the command P
Transfer EB to SLAVE. SLAVE CPU1
Receives this command PEB and checks the PRQ flag. In this case, the PRQ flag has already been set and therefore the command PEB is output to MASTER. M
The aster CPU 1 receives this command PEB, outputs the command PST to SLAVE, and at the same time, outputs the N + 1th command.
Start playing the musical sound of the song. Also, the SLAVE receiving the command PST sends the command PST to END / SLAVE.
Output to and start playing the N + 1th musical tone,
Similarly, the END / SLAVE receiving the command PST also starts the musical tone reproduction of the (N + 1) th song. Note that FIG. 7 shows MA
The Nth order of STER → SLAVE → END / SLAVE
It is a figure which shows the command transfer state at the time of completion | finish of the musical sound reproduction of a music piece.

(4) From the state in which MASTER and SLAVE perform musical sound reproduction (PLAY) and END / SLAVE performs data recording (REC / PLAY), MAS
When the musical sound reproduction of TER ends, and then the musical sound reproduction of SLAVE ends (FIG. 8). First, when the music reproduction of MASTER is completed, the MASTER
The commands ERQ and PRQ are output from R to SLAVE, respectively. The SLAVE CPU1 uses the command PRQ
The PRQ flag in the RAM 4 is set based on next,
When the musical sound reproduction of SLAVE ends, SLAVE outputs commands ERQ and PRQ to END / SLAVE. The END / SLAVE CPU1 uses the command E
The RQ is decoded, and the command S
Transfer RQ (Stop request) to SLAVE, then
The STOP command is output to the disk controller 12.
As a result, END / SLAVE goes into the STOP state. When the command SRQ is supplied to SLAVE, SL
The AVE CPU 1 decodes the command SRQ, and based on the result of the decoding, first the command SRQ is MASTE.
Output to R, then STO to disk controller 12
Output P command. This makes SLAVE STOP
It becomes a state. When the command SRQ is supplied to the MASTER, the MASTER CPU 1 sends the command S
The RQ is decoded, and according to the result of the decoding, the command SRQ is first output to SLAVE again, and then the STOP command is output to the disk controller 12. As a result, the MSTER goes into the STOP state. When the command SRQ is output again from MASTER to SLAVE, S
LAVE CPU1 again sends command SRQ to END / S.
Output to LAVE and S to disk controller 12
Output the TOP command. Similarly, SLAVE to END
・ When command SRQ is output to SLAVE, END
・ SLAVE CPU1 is again disk controller 1
Output the STOP command to 2. In this way, all three electronic musical instruments are in the STOP state. Finally, MAST
The reason why the command SRQ is output again from the ER is to ensure that each electronic musical instrument is in the STOP state.

(5) MASTER / END / SLAVE
When the MASTER reproduces the musical sound, and the SLAVE records the data, and then the MASTER reproduces the musical sound (FIG. 9). When the music playback of MASTER ends, MA
STER outputs commands ERQ and PRQ to SLAVE. The SLAVE CPU 1 first determines the MASTER and END.
The command SRQ is output to SLAVE, and then the STOP command is output to the disk controller 12. As a result, SLAVE goes into the STOP state. When the command SRQ is supplied to the MASTER, the MASTER CPU
1 deciphers this and sends the command S
The RQ is output to SLAVE and the STOP command is output to the disk controller 12. END / SLAV
When command SRQ is supplied to E, END / SLAV
The CPU 1 of E decodes this and the disk controller 1
Output the STOP command to 2. In this way, all three electronic musical instruments are in the STOP state.

Note that FIG. 10 is a diagram showing command transfer in the same state as that shown in FIG. 9 when END / SLAVE musical tone reproduction is finished first, and then MASTER musical tone reproduction is finished. END / SLA
No command is transferred at the end of the VE tone reproduction, and at the end of the MASTER tone reproduction,
Command transfer exactly the same as in FIG. 9 is performed.

(6) MASTER records data,
When the MASTER stop switch is operated while SLAVE and END / SLAVE are playing music (Fig. 11). When the MASTER stop switch is operated, the MASTER CPU 1 detects this and transfers the command SRQ to SLAVE, and at the same time S
The TOP command is output to the disk controller 12. As a result, the MASTER goes into the STOP state. SLA
When the command SRQ is supplied to VE, C of SLAVE
PU1 detects this, transfers the command SRQ to END / SLAVE, and outputs a STOP command to the disk controller 12. When the command SRQ is transferred to END / SLAVE, the CPU of END / SLAVE
1 detects this and outputs a STOP command to the disk controller 12. In this way, all three electronic musical instruments are stopped.

(7) MASTER is the data recording state, S
From the state where the LAVE and END / SLAVE are playing the musical sound, the playing of the musical sound of SLAVE ends, and then EN
When the musical sound reproduction of D.SLAVE is completed (FIG. 12).
First, when the reproduction of the musical sound of SLAVE is finished, the commands ERQ and PRQ are respectively END and S, as in the case of FIG.
Output to LAVE. END / SLAVE CPU1
Sets the PRQ flag in the RAM 4 based on the command PRQ. Next, when the END / SALAVE tone reproduction ends, the END / SLAVE CPU 1 sends the command PE command because the PRQ flag is already set at this point.
Command PEB to transfer B to SLAVE is SLAVE
Is supplied to SLAVE, the command PEB is output from SLAVE to MASTER. However, in this case, the MASTER is in the REC PLAY (data recording) state, and therefore the command PEB is ignored. And MASTER
When the stop switch of is pressed, MASTER is set to ST
The command SRQ becomes MASTER when the OP status
From SLAVE to END / SLAVE,
As a result, all three electronic musical instruments are in the STOP state.

The above is a specific example of the synchronous operation by command transfer. As described above, each electronic musical instrument shown in FIG. 2 has two asynchronous type communication interface adapters ACIA.I and ACIA.II, and the command transfer is performed via these ACIA.I and II. By doing so, the synchronization start of the second music, the third music, etc., and other synchronization operations are performed. The commands and command transfer methods described above are merely examples, and it is of course possible to perform synchronous operation based on another type of command and transfer method.

[0027]

As described above, according to the present invention, when a desired control instruction is given by a certain first electronic musical instrument, the control is not immediately executed by the first electronic musical instrument. First, a request command is transmitted, and when the request command for the desired control transmitted from the first electronic musical instrument is received by another electronic musical instrument, the other electronic musical instrument is made ready to execute this control. If there is, send a confirmation command,
The first electronic musical instrument executes the desired control in response to the reception of the confirmation command and sends an execution command, and the other electronic musical instruments perform the desired control in response to the reception of the execution command. Since it is designed to be executed, there is an excellent effect that desired control can be surely executed in synchronization with each electronic musical instrument based on transmission and reception of these three types of commands.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of one electronic musical instrument used in a synchronous control system according to the present invention.

FIG. 2 is a block diagram showing an example of the overall configuration of a synchronous control system according to the present invention, showing a state in which a plurality of electronic musical instruments of FIG. 1 are serially connected.

FIG. 3 is a first command transfer between electronic musical instruments in a case where three electronic musical instruments of FIG. 1 are serially connected to each other to configure an embodiment of a synchronous control system according to the present invention and perform synchronous operation control. The figure which shows a specific example.

FIG. 4 is a second example of command transfer between electronic musical instruments when the three electronic musical instruments of FIG. 1 are serially connected to each other to configure an embodiment of the synchronous control system according to the present invention and perform synchronous operation control. The figure which shows a specific example.

FIG. 5 is a third example of command transfer between electronic musical instruments when the three electronic musical instruments of FIG. 1 are serially connected to each other to configure an embodiment of the synchronous control system according to the present invention and perform synchronous operation control. The figure which shows a specific example.

6 is a fourth example of command transfer between electronic musical instruments in the case where three electronic musical instruments shown in FIG. 1 are serially connected to each other to configure an embodiment of the synchronous control system according to the present invention and perform synchronous operation control. The figure which shows a specific example.

FIG. 7 is a fifth example of command transfer between electronic musical instruments in the case where three electronic musical instruments of FIG. 1 are serially connected to each other to configure an embodiment of the synchronous control system according to the present invention and perform synchronous operation control. The figure which shows a specific example.

8 is a sixth example of command transfer between the electronic musical instruments when the three electronic musical instruments of FIG. 1 are serially connected to each other to configure the embodiment of the synchronous control system according to the present invention and perform synchronous operation control. The figure which shows a specific example.

9 is a seventh example of command transfer between electronic musical instruments in the case where three electronic musical instruments of FIG. 1 are serially connected to each other to configure an embodiment of the synchronous control system according to the present invention and perform synchronous operation control. The figure which shows a specific example.

FIG. 10 is an eighth example of command transfer between electronic musical instruments in the case where three electronic musical instruments of FIG. 1 are serially connected to each other to configure an embodiment of the synchronous control system according to the present invention and perform synchronous operation control. The figure which shows a specific example.

FIG. 11 is a ninth example of command transfer between electronic musical instruments when three electronic musical instruments of FIG. 1 are serially connected to each other to configure an embodiment of the synchronous control system according to the present invention and perform synchronous operation control. The figure which shows a specific example.

FIG. 12 is a tenth example of command transfer between electronic musical instruments in the case where three electronic musical instruments of FIG. 1 are serially connected to each other to configure an embodiment of the synchronous control system according to the present invention and perform synchronous operation control. The figure which shows a specific example.

[Explanation of symbols]

1 Central Processing Unit (CPU) 5 Musical Sound Generator 8 Input Console ACIA / I, ACIA / II Interface Adapter MASTER, SLAVE / 1, SLAVE / 2, ...
SLAVE ・ M, END ・ SLAVE electronic musical instruments

Claims (5)

[Claims] 1. Control instruction means for instructing desired control,
A transmission means for transmitting at least a request command and an execution command relating to the control, a reception means for receiving at least a confirmation command, and an execution means for executing the desired control based on a control instruction from the control instruction means; A second electronic instrument comprising: an electronic musical instrument; a transmitting means for transmitting at least a confirmation command; a receiving means for receiving at least a request command and an execution command; an executing means for executing the desired control; and a transmitting means. An electronic musical instrument; a means for transmitting the command between the electronic musical instruments via the transmitting means and the receiving means in the first and second electronic musical instruments; and the control instruction means in the first electronic musical instrument. When the desired control instruction is given by the first electronic musical instrument, the request command is transmitted from the first electronic musical instrument. In response to the reception of the request command in the electronic musical instrument, if the second electronic musical instrument is capable of executing the desired control, the confirmation command is transmitted if it is possible, and In response to the receipt of the confirmation command by the first electronic musical instrument, the execution means of the first electronic musical instrument executes the desired control and sends the execution command, and the execution by the second electronic musical instrument. Synchronization control means for causing the execution means of the second electronic musical instrument to execute the desired control in response to the reception of a command, and the desired electronic musical instrument is controlled by the first electronic musical instrument and the second electronic musical instrument. A synchronous control system for electronic musical instruments, characterized in that control is executed in synchronization. 2. The synchronous control system for an electronic musical instrument according to claim 1, wherein the desired control is control of start and stop of automatic performance. 3. A system for synchronously controlling a plurality of electronic musical instruments, each electronic musical instrument comprising control instruction means for instructing desired control, and a request command, confirmation command and execution relating to the control. The electronic device includes a transmitting unit for transmitting a command to another electronic musical instrument, and a receiving unit for receiving a request command, a confirmation command, and an execution command from the other electronic musical instrument. The electronic musical instrument comprises means for transmitting the command between the electronic musical instruments through the transmitting means and the receiving means, and when each electronic musical instrument has a control instruction by the control instruction means in its own electronic musical instrument, a request command is issued. It sends it to another electronic musical instrument, then waits for reception of a confirmation command from the other electronic musical instrument, and responds to the reception of the confirmation command by itself. When the electronic musical instrument executes the desired control and sends an execution command to the other electronic musical instrument, while receiving a request command from the other electronic musical instrument, the electronic musical instrument executes the desired control. Synchronous control for sending a confirmation command to the other electronic musical instrument if possible, and then executing the desired control in its own electronic musical instrument in response to an execution command received from the other electronic musical instrument A synchronous control system for an electronic musical instrument, comprising: 4. The synchronous control system for an electronic musical instrument according to claim 3, wherein the desired control is control of start and stop of automatic performance. 5. A method for synchronously controlling a plurality of electronic musical instruments, wherein each electronic musical instrument sends a request command, a confirmation command and an execution command relating to predetermined control to another electronic musical instrument. And a receiving unit that receives a request command, a confirmation command, and an execution command from another electronic musical instrument, and an executing unit that executes the predetermined control, and the transmitting unit and the receiving unit for each of the electronic musical instruments. A means for transmitting the command between the electronic musical instruments via the means, and when it is instructed to perform the predetermined control in any first electronic musical instrument of the electronic musical instruments, Transmitting a request command relating to the control from the first electronic musical instrument to another electronic musical instrument, and receiving the request command in the other electronic musical instrument. In response to the request command, transmitting a confirmation command in accordance with a state of whether or not the predetermined control relating to the request command can be executed in its own electronic musical instrument; and in the first electronic musical instrument, the other electronic musical instrument. Executing the predetermined control in response to receiving the confirmation command from the musical instrument and sending an execution command to the other electronic musical instrument; and, in the other electronic musical instrument, responding to receiving the execution command. And a step of executing the predetermined control.