JPH0434753B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for synchronously operating a plurality of electronic musical instruments that can perform automatically.

In recent years, various electronic musical instruments have been developed in which the process of playing a keyboard is stored in a storage unit such as a floppy disk, and the stored data is read out to automatically perform the performance. By the way, it is impossible to prepare a plurality of such electronic musical instruments and operate each electronic musical instrument in synchronization on the order of several milliseconds by manual operation, and some kind of synchronized operation method is required.

Therefore, this invention allows multiple electronic musical instruments to be connected for several milliseconds.
This provides a method for synchronized operation of electronic musical instruments that can be operated in synchronization with the order of performance data. receiving means for receiving automatic performance start and stop commands from the musical instrument; and according to the commands received by the receiving means, when the play mode is set, the performance data stored in the storage means is played back. ,
When the record mode is set, automatic performance means stores performance data in the storage means, and the commands received by the reception means are transmitted to the lower electronic musical instrument via the second interface adapter. and transmitting means for supplying the information to the computer.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an electronic musical instrument driven by the synchronous operation method according to the present invention. In this diagram, 1 is the CPU (central processing unit)
It is connected to each part of the device via a bus line 2. 3 is a ROM (read only memory) in which programs used by the CPU 1 are stored; 4 is a RAM (random access memory) in which various data are stored. Reference numeral 5 denotes a musical tone generating section, which forms a musical tone signal based on the performance data supplied via the CPU 1 and supplies it to the speaker 7 via the amplifier 6. Reference numeral 8 denotes an input console, which includes a play switch, a stop switch, a record switch, and other control switches. 9 is a keyboard. This keyboard 9 has
A key switch for detecting key operations and a keystroke strength detector for detecting keystroke strength are provided corresponding to each key, and the outputs of each key switch and keystroke strength detector are supplied to the key data generating device 10. Ru. The key data generator 10 scans the output of each key switch of the keyboard 9 to detect a key in an on state, 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 configuration, the floppy disk 11
If you want to record performance data on the performer's keyboard 9.
The key code and keystroke strength data output from the key data generator 10 in accordance with the operation of
The CPU 1 reads the data at a constant sampling period, creates performance data based on the read data, and sequentially writes it to the RAM 4. When a certain amount of performance data is written into the RAM 4, the performance data is transferred to the floppy disk 11 via the disk controller 12. Further, in this case, the CPU 1 sequentially supplies the key code and keystroke strength data outputted from the key data generating device 10 to the tone generating section 5. As a result, speaker 7
A musical tone corresponding to the operation of the keyboard 9 is generated. On the other hand, when reproducing the performance data recorded on the floppy disk 11, the CPU 1 reads out the performance data recorded on the floppy disk 11 and sequentially supplies it to the musical tone generating section 5. As a result, reproduced musical tones are generated from the speaker 7.

However, each part described above is the same as the configuration of a conventional electronic musical instrument. By the way, in addition to the above-mentioned configuration, the electronic musical instrument shown in FIG. 1 is equipped with an asynchronous communication interface adapter ACIA and a
ACIA・ is established for each. Then these
Explain ACIA・and. ACIA・
and are each made by Motorola, for example.
It is well known as MC6850, and its data line, interrupt terminal, etc. are connected to bus line 2, and its transmission data terminal, reception data terminal,
DCD (Data Carrier Detect) terminal etc. is terminal T1
(or T2). And CPU1
After storing the command or data supplied from the transmitter in the internal transmit data register, it is serially output from the transmit data terminal, and the serial data (or command) supplied to the receive data terminal is stored in the internal receive data register. After being temporarily stored in , it is output to bus line 2 as 8-bit parallel data. In addition, in CPU1, the ACIA and DCD terminals are “H” as described later.
The connection status with other electronic musical instruments is detected depending on whether the level is high or not.

FIG. 2 is a diagram showing a plurality of the above-mentioned electronic musical instruments arranged side by side. In the following, for convenience of explanation, the leftmost electronic instrument will be referred to as MASTER, and in the following order:
SLAVE・1, SLAVE・2...Set it as SLAVE・M, and let the rightmost electronic instrument be END・SLAVE. In addition, MASTER is a top-of-the-line electronic musical instrument,
Make END/SLAVE the lowest electronic instrument.

In Figure 2, MASTER's ACIA is
Connected to ACIA of SLAVE・1, SLAVE・
The ACIA of 1 is connected to the ACIA of SLAVE 2, and the ACIA of SLAVE M is connected to the ACIA of SLAVE 2.
Connected to ACIA of END and SLAVE.
As a result, between MASTER and SLAVE・1,
Between SLAVE・1 and SLAVE・2...
Commands are transmitted between SLAVE・M and END・SLAVE. Note that in this embodiment, no data is transmitted between the electronic musical instruments. Also, MASTER
The DCD terminal of ACIA・ is pulled up to “H” level in SLAVE・1, and the
The DCD terminal of ACIA・ is pulled up in MASTER, and the DCD terminal of ACIA・ of SLAVE・1 is pulled up in MASTER.
The terminal is pulled up in SLAVE・2,
..., the DCD terminal of END/SLAVE's ACIA/
It is pulled up in SLAVE・M.
On the other hand, the MASTER's ACIA• DCD terminal and the END/SLAVE's ACIA• DCD terminal are not pulled up. By connecting this DCD terminal, CPU 1 in each electronic musical instrument is either the master CPU or SLAVE 1~
Either SLAVE/M CPU or END/
This can be used to detect the SLAVE CPU.

Next, the operation of each electronic musical instrument shown in FIG. 2 when the electronic musical instruments are operated synchronously will be explained with reference to FIGS. 3 to 12. For convenience of explanation, it is assumed that there is only one SLAVE.

(1) MASTER in STOP state,
When SLAVE, END and SLAVE are set to PLAY (musical sound playback) state at the same time (Figure 3).

In this case, the operator operates a play switch provided on the input console 8 of the MASTER. When the play switch is operated,
MASTER CPU1 detects this and commands
It outputs a PRQ (Play request) to ACIA and also outputs a PLAY preparation command to the disk controller 12. ACIA・He command PRQ
When supplied, ACIA• converts this command into serial data, outputs it from the transmit data terminal, and supplies it to the receive data terminal of ACIA• on the SLAVE.

When a command PRQ is supplied to the receive data terminal of ACIA• of SLAVE, ACIA• sequentially reads this command PQR into its internal receive data register, and outputs an interrupt signal to CPU 1 when this read is completed. CPU1
receives this interrupt signal, reads the command PRQ from ACIA, and decodes the read command. Then, when CPU1 decodes the read command as command PRQ, it first sends command PRQ to END and SLAVE via ACIA.
ACIA. Then, a PLAY preparation command is output to the disk controller 12.
When a command PRQ is supplied to ACIA of END/SLAVE, this command PRQ is sent to END/SLAVE.
It is read into CPU1 of SLAVE and decoded. Then, based on this decoding result, CPU1
A PLAY preparation command is output to the disk controller 12. Note that no electronic instruments are connected below END/SLAVE, so
END/SLAVE CPU1 never outputs the command PRQ.

Next, when the END/SLAVE disk controller 12 completes the PLAY preparation, it sends a completion signal.
Output to CPU1. CPU1 receives this completion signal and sends the command PEB (Play enable) to ACIA.
Transfer to SLAVE's ACIA via .
This command PEB is read into CPU1 of SLAVE and decoded. Next, CPU1 of SLAVE is
At this point, from disk controller 12
If the PLAY ready signal has arrived, immediately, if not, wait for it to arrive and issue the command
MASTER via ACIA/PEB
Transfer to ACIA. This command PEB is
It is read into MASTER's CPU1 and decoded.
If the PLAY ready signal has arrived from the disk controller 12 at this point, the MASTER's CPU 1 will immediately issue the command PST (Play start) if it has not yet arrived.
Output to SLAVE via ACIA, then
A start command is output to the disk controller 12. Thereafter, the performance data recorded on the floppy disk 11 of the MASTER is sequentially read out and supplied to the musical tone generator 5 via the CPU 1, whereby reproduced musical tones are generated from the speaker 7. Also, when the command PST is supplied to SLAVE, CPU1 of SLAVE receives this command.
Read and decrypt PST. Then, based on this decoding result, the command PST is END/SLAVE.
and then output to disk controller 1.
Outputs a start command to 2. This results in
Musical sound playback of SLAVE begins. Also,
When the command PST is supplied to END/SLAVE, CPU1 of END/SLAVE receives this command.
The PST is read and decoded, and a start command is output to the disk controller 12 based on the decoding result. As a result, the musical tones of END and SLAVE start playing.

In this way, the musical tones of the three electronic musical instruments begin to be reproduced almost simultaneously. Here, if the command transmission speed between each ACIA is 9600 ports, and each command has an 8-bit configuration, the transmission delay between each electronic musical instrument is approximately 1 msec, and therefore, within approximately 2 msec. It is possible to start playing music from three electronic musical instruments.

(2) MASTER in STOP state, SLAVE in STOP state, REC, and END/SLAVE in WAIT (waiting for recording) state at the same time.
PLAY state, PLAY state, REC/PLAY (data recording) state (Figure 4).

In this case, the operator must select MASTER,
Set SLAVE to STOP state, and also set END/
By pressing the record switch of SLAVE, END/SLAVE is set to REC/WAIT state. Then, when you press the play switch,
The same command transfer as in Figure 3 is performed,
This allows MASTERSLAVE, END,
SLAVE is almost simultaneously in PLAY state, PLAY state,
Enters REC/PLAY state.

Note that FIG. 5 shows the case where MASTER is in the REC/PLAY state and SLAVE, END/SLAVE are in the PLAY state, and the command transfer in this case is the same as in FIG. 3.

(3) In a state where all three electronic musical instruments are playing the Nth musical tone, if the playing of the Nth musical tone of each electronic musical instrument ends at different times, the N+1th musical tone of each electronic musical instrument When starting the musical tones of the songs at the same time (Fig. 6).

Now, assume that the playback of the Nth musical tone of SLAVE has finished for the first time (PLAY/END). In this case, from SLAVE the command ERQ (Endrequest)
and PRQ (Play request) are sequentially END/
Output to SLAVE. END・SLAVE CPU
1 reads this command ERQ and PRQ,
decipher. Since musical sound playback is currently in progress at END/SLAVE, the command
The PRQ flag in RAM 4 is set based on the PRQ decoding result, and command processing is completed. In addition,
Command ERQ is a valid command only when it is in REC/RLAY state, and is ignored in this case. Next, when MASTER finishes playing music, the command ERQ from MASTER is
and PRQ are output to SLAVE. SLAVE
The CPU 1 reads and decodes the commands ERQ and PRQ. And in this case END・
Since the command PEB has not arrived from SLAVE, set the PRQ flag in RAM4. Next, when the musical tone playback of END/SLAVE is finished, CPU1 of END/SLAVE is
Check PRQ flag. In this case, since the PRQ flag is set, the command PEB is transferred to SLAVE. SLAVE CPU
1 receives this command PEB and checks the PRQ flag. In this case, the PRQ flag is already set and therefore the command PEB
Output to MASTER. MASTER's CPU1 receives this command PEB and sends the command PST.
At the same time as outputting to SLAVE, playback of the N+1th musical tone is started. Also, SLAVE that received the command PST will END/SLAVE the command PST.
At the same time, it starts playing the N+1th musical tone, and similarly receives the command PST.
END/SLAVE also starts playing the N+1th musical tone.

In addition, Figure 7 shows MASTER→SLAVE→
FIG. 7 is a diagram showing command transfer when the reproduction of the Nth musical tone is completed in the order of END and SLAVE.

(4) MASTER and SLAVE play musical sounds (PLAY)
and from the state where END/SLAVE is recording data (REC/PLAY),
Once the MASTER musical tone has finished playing,
When SLAVE musical tone playback ends (Figure 8).

First, when MASTER finishes playing music,
As in the case described above, commands ERQ and PRQ are each output from MASTER to SLAVE. The SLAVE CPU 1 sets the PRQ flag in the RAM 4 based on the command PRQ. next,
When the musical tone playback of SLAVE is finished, commands ERQ and PRQ are sent from SLAVE to END/SLAVE.
Output to. CPU1 of END/SLAVE is
Deciphers the command ERQ and first issues the command SRQ (Stop request) based on the decoding result.
The data is transferred to SLAVE, and then a STOP command is output to the disk controller 12. As a result, END/SLAVE enters the STOP state.
When command SRQ is supplied to SLAVE,
SLAVE's CPU1 decodes this command SRQ, and based on the decoding result, first executes the command
It outputs SRQ to MASTER, and then outputs a STOP command to disk controller 12. This causes SLAVE to enter the STOP state. Also,
When command SRQ is supplied to MASTER,
The MASTER's CPU 1 decodes this command SRQ, and according to the decoding result, first outputs the command SRQ again to SLAVE, and then outputs a STOP command to the disk controller 12.
This causes MASTER to enter the STOP state.
When the command SRQ is output again from MASTER to SLAVE, the CPU 1 of SLAVE again outputs the command SRQ to END/SLAVE, and also outputs a STOP command to the disk controller 12. Similarly, when command SRQ is output from SLAVE to END/SLAVE, END/SLAVE
CPU1 goes to disk controller 12 again.
Outputs a STOP command. In this way, all three electronic musical instruments enter the STOP state. In addition, ultimately
The reason why command SRQ is outputted again from MASTER is to ensure that each electronic musical instrument is in the STOP state.

(5) When MASTER, END, and SLAVE are playing music and SLAVE is recording data, when MASTER finishes playing music (Figure 9).

When the MASTER musical tone playback ends,
MASTER sends commands ERQ and PRQ
Output to SLAVE. Based on the result of decoding the command ERQ, CPU1 of SLAVE first
Command to MASTER and END/SLAVE
It outputs SRQ and then outputs a STOP command to the disk controller 12. This results in
SLAVE becomes STOP state. When command SRQ is supplied to MASTER, MASTER's
The CPU 1 decodes this and outputs the command SRQ to the SLAVE as well as the STOP command to the disk controller 12, as in the case described above. When the command SRQ is supplied to END/SLAVE, the CPU 1 of END/SLAVE decodes it and sends it to the disk controller 12.
Outputs a STOP command. In this way, all three electronic musical instruments enter the STOP state.

In addition, FIG. 10 is a diagram showing the command transfer when the musical tone playback of END/SLAVE is first completed and then the musical tone reproduction of MASTER is finished from the same state as shown in FIG. 9. In this case, END・No commands are transferred when SLAVE musical tone playback ends.
When the musical tone playback of MASTER is finished, the 9th
Command transfer is performed exactly as shown in the figure.

(6) MASTER performs data recording, SLAVE,
When the MASTER stop switch is operated while END/SLAVE is playing music (Figure 11).

When the MSTER's stop switch is operated, the MASTER's CPU1 detects this, transfers the command SRQ to the SLAVE, and also sends the STOP switch to the SLAVE.
A command is output to the disk controller 12.
This causes MASTER to enter the STOP state.
When command SRQ is supplied to SLAVE,
SLAVE's CPU1 detects this and executes END/
Along with forwarding the command SRQ to SLAVE,
A STOP command is output to the disk controller 12. When the command SRQ is transferred to END/SLAVE, CPU1 of END/SLAVE detects this and sends the STOP command to disk controller 1.
Output to 2. In this way, all three electronic musical instruments come to a stopped state.

(7) MASTER is in data recording state, SLAVE,
END・SLAVE is playing music, then SLAVE's music playback ends, and then
When the musical sound playback of END/SLAVE ends.

First, when the musical tone playback of SLAVE is finished, the commands ERQ and PRQ are
are output to END and SLAVE respectively. END・
SLAVE's CPU1 is based on command PRQ
Set the PRQ flag in RAM4. Then,
When the musical tone playback of END/SLAVE is finished, since the PRQ flag is already set at this point,
END/SLAVE CPU1 sends command PEB
When the command PEB to be transferred to the SLAVE is supplied to the SLAVE, the command PEB is output from the SLAVE to the MASTER. But in this case
MASTER is in the REC/PLAY (data recording) state, so the command PEB is ignored. Then, when the MASTER stop switch is pressed, the MASTER enters the STOP state, and the command SRQ is sent from the MASTER to SLAVE,
It is sequentially transferred to END and SLAVE, and as a result,
All three electronic musical instruments become STOP.

The above is a specific example of synchronous operation using command transfer. As mentioned above, each electronic musical instrument shown in FIG. 2 has two internal asynchronous communication interface adapters ACIA and ACIA, and commands are transferred via these ACIA and. As a result, the synchronous performances of the second synchronously started music, the third synchronous music, and so on, and other synchronous operations are performed.

Note that the above-described command and command transfer method are merely examples, and it is of course possible to perform synchronous operation based on a different type of command and transfer method.

As explained above, according to the present invention, automatic performance start and stop commands are received from a host electronic musical instrument via a storage means capable of writing and reading performance data and a first interface adapter. a receiving means; and according to the command received by the receiving means, when the play mode is set, playing the performance data stored in the storage means;
When the record mode is set, automatic performance means stores performance data in the storage means, and the commands received by the reception means are transmitted to the lower electronic musical instrument via the second interface adapter. Since the operation of each electronic musical instrument is synchronized by transmitting commands between each electronic musical instrument through these interface adapters, multiple It becomes possible to operate electronic musical instruments synchronously on the order of several milliseconds. Furthermore, synchronous playback and synchronous recording of multiple electronic musical instruments can be performed using common automatic performance start and stop commands. In other words, depending on the motor settings of each electronic instrument, it is possible to perform an ensemble performance with multiple electronic instruments,
You can now memorize new performance parts while listening to the performance of other electronic musical instruments, greatly improving operability.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an example of the configuration of an electronic musical instrument to which the synchronous operation method according to the present invention is applied, Fig. 2 is a block diagram showing a plurality of electronic musical instruments shown in Fig. 1 connected in series, and Fig. 3. ~FIG. 12 is a diagram showing a specific example of command transfer between the electronic musical instruments when three electronic musical instruments each having the same configuration as the electronic musical instrument shown in FIG. 1 are operated synchronously by the method according to the present invention. It is. 1...Central processing unit (CPU), ACIA...
ACIA...Interface adapter.

Claims (1)

[Scope of Claims] 1. Storage means capable of writing and reading performance data; Receiving means for receiving automatic performance start and stop commands from a host electronic musical instrument via a first interface adapter; In accordance with the command received by the receiving means, when the play mode is set, playing the performance data stored in the storage means;
When the record mode is set, automatic performance means stores performance data in the storage means, and the commands received by the reception means are transmitted to the lower electronic musical instrument via the second interface adapter. An electronic musical instrument characterized by comprising: a transmitting means for supplying a signal to an electronic musical instrument.