JP3197620B2 - Performance information communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to MIDI (Musical I
More particularly, the present invention relates to a performance information communication device that can perform an ensemble performance by using a MIDI device that receives a MIDI information and generates a musical tone to perform the performance.

[0002]

2. Description of the Related Art In recent years, as the number of electronic musical instruments (MIDI devices) having input / output terminals for MIDI information has increased, there has been an opportunity to perform an ensemble performance by connecting and combining a plurality of MIDI devices with a communication cable. It has increased. Acoustic musical instruments other than electronic musical instruments, for example, pianos, have been developed so-called automatic performance pianos configured to automatically perform according to MIDI information, and ensemble performances including these pianos are also being performed.

[0003]

However, when an ensemble performance is performed using a plurality of MIDI devices having various configurations as described above, there is a problem as described below, and a suitable performance cannot always be performed. .

[0004] That is, when performance information composed of a plurality of channels is read out by, for example, a sequencer or the like, and transmitted to a MIDI device for each channel to perform an ensemble performance, a signal for instructing sound generation is given by the characteristics of each MIDI device. Since the time from when the (sound generation signal) is transmitted to when the sound is generated is different, the timing of the sound generation in the performance sometimes does not match. For this reason, there is a problem that the quality of performance is deteriorated due to the shift of the timing of sound generation.

In particular, in an acoustic musical instrument such as a piano, it takes about several tens to 100 ms from when a key starts to move according to a sound signal to when a hammer strikes a string and is sounded. There was a big problem that ensemble performance could not be performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in particular, in a configuration including an automatic acoustic performance, performance information capable of performing an ensemble performance of high performance quality with uniform sounding timing. It is an object to provide a communication device.

[0007]

In order to achieve the above object,
As shown in FIG. 1, the invention of claim 1 includes a receiving unit M1 for receiving MIDI information of a plurality of channels, a storage unit M2 for temporarily storing MIDI information received by the receiving unit M1, and a storage unit M2. And a transmitting unit M4 for transmitting the MIDI information read by the reading unit M3. A timing changing means for changing the transmission timing for each of the plurality of channels; and a changing time for delaying the transmission timing in order to prevent a deviation in performance between the respective channels. The amount of music for each channel
And a change time setting means M6 for setting corresponding to the instrument .

Further, according to the invention of claim 2, an acoustic instrument is provided in accordance with the MIDI information of each channel.
Further comprising a plurality of MIDI devices, including a summary performance information communication apparatus 請 Motomeko 1 wherein it said.

[0009]

According to the first aspect of the present invention, the receiving means M1 receives MIDI information of a plurality of channels,
The received MIDI information is temporarily stored by the storage unit M2. Next, the MI of the storage unit M2 is read by the read unit M3.
The DI information is read, and the MIDI information is transmitted by the transmitting means M4.

[0010] Then, by the change time setting means M6,
In order to prevent deviations in performance between the channels, a change time amount for delaying the transmission timing is appropriately set, and based on the set transmission timing, the timing changing means M5 causes each channel of the plurality of channels to be changed. Each transmission timing is delayed. That is, according to the present invention, it is possible to improve the performance quality by appropriately setting the transmission timing of the MIDI information, thereby adjusting the sounding timing of a plurality of MIDI devices including an acoustic instrument such as an automatic performance piano. Become.

According to the second aspect of the present invention , each channel
Acoustic instruments are included in response to MIDI information
Since it has a plurality of MIDI devices,
It is possible to realize a performance in which the sound generation timing by the DI device is uniform.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is an example of a configuration in which an ensemble performance is performed using the performance information communication device 1 of the present embodiment.

As shown in FIG. 2, a sequencer 3 on which a floppy disk 2 storing performance information is mounted is connected to the performance information communication device 1, and the sequencer 3 supplies the performance information communication device 1 with the performance information. You. The performance information communication device 1 includes an automatic performance piano 5, an electronic organ 6, a drum machine 7, a MIDI sound source 8 and other MIDs.
The performance information communication device 1 is connected to the performance information communication device 1 and transmits performance information whose tone generation timing is adjusted.

FIG. 3 is a block diagram showing the main electrical configuration of the performance information communication device 1, and FIG. 4 is a block diagram showing the internal configuration of the performance information communication device 1 and its signal path in more detail. . As shown in FIG. 3, the performance information communication device 1
Is composed of a CPU 10 serving as a main part of the control device, a ROM 11 for storing control programs and the like, a RAM 12 for temporarily storing (backup) performance information and the like, a timer 14, an input / output interface 15, and a bus 16 for connecting them. , This input / output interface 15
MIDI that receives MIDI information from sequencer 3
The MID is transmitted to the receiving unit 17 and each of the MIDI devices 5, 6, 7, and 8.
A MIDI transmitting unit 18 for transmitting I information is connected.

As shown in FIG. 4, the RAM 12 has a temporary buffer 20 for temporarily storing the performance information sent from the receiving unit 17, and a time waiting buffer 21 for storing the performance information for each of the 16 channels. And an area such as a transmission buffer 22 for temporarily storing performance information to be transmitted. Note that the timer counter 25
The signal advances from every 5 ms in response to a signal from

A change amount (delay amount) of a transmission timing for each channel is set by a delay amount setting unit 23 provided in the performance information communication device 1 in accordance with the MIDI device that performs the ensemble performance. That is, by operating the delay amount setting unit 23, the delay amount is set and changed, and is stored in the delay register 24 set for each channel.

Here, the MIDI information input to the performance information communication device 1 of this embodiment will be described. As shown in Table 1 below, the event data that constitutes the MIDI information (for example, driving an automatic performance piano) usually has a 1-byte status byte (first byte) and a 2-byte data byte (second and third bytes). ) Is configured as data with three bytes as one unit.

The status byte includes a status indicating a key press (note on), a key release (note off), a program change, and the like, and a channel code indicating which musical instrument (16 types) the individual event data is. Is set. In the data byte, data indicating a note number (pitch) indicating a key type, velocity (volume) indicating a key-stroke speed, and the like are set.

[0019]

[Table 1]

Next, the control processing performed by the performance information communication apparatus 1 having the above-described configuration will be described with reference to the flowcharts of FIGS. 4 and 5 to 7. 5 is a main routine for setting a delay amount, FIG. 6 is a MIDI reception interrupt routine performed when a MIDI signal is received, and FIG. 7 is performed based on the operation of the timer 14. This is a timer interrupt processing routine.

First, as shown in FIG. 5, when the power is turned on, in step (hereinafter, step is referred to as S) 100,
The buffers 21 of all channels are cleared. Following S11
At 0, it is determined whether or not the delay amount setting has changed based on the signal from the delay amount setting unit 23. If the determination is affirmative, the process proceeds to S120. If the determination is negative, the process stands by.

In S120, the contents of the delay register 24 are changed to the newly set delay amount, and in S110
Return to That is, the processes in S100 to S120 are processes for holding or updating the delay amount, and the delay amount previously set according to the MIDI device is used as it is unless the delay amount is changed.

Next, as shown in FIG.
7, when the MIDI signal is input, the received data is read into the temporary buffer 20 in S200. The following S
At 210, it is determined whether or not the received data is data completed as a MIDI message. If a negative determination is made here, the process is once terminated to read data subsequently, while an affirmative determination is made. And S220.

At S220, it is determined whether or not the received data is a channel message instructing an operation for each channel. If the determination is affirmative, the process proceeds to S230. S230
Then, a time stamp which is current time information is added to the channel message, and the process proceeds to S240. That is, time information used when adjusting transmission timing described later is recorded together with the channel message. Therefore, in this process, the sound is normally generated later than the time of the time stamp.

In S240, the contents of the temporary buffer 20 are transferred to the time waiting buffer 21 of the corresponding channel. In the following S250, only the data bytes of the temporary buffer 20 are cleared, and the present process is ended once.

On the other hand, a negative determination is made in S220, that is, it is determined that the received data is not a channel message but a common message such as control data, and the process proceeds to S26.
At 0, the contents of the temporary buffer 20 are
The IDI is output, and the process proceeds to S250.

That is, in the processing in S200 to S250, if the read received data is a channel message, the data is sequentially stored for each channel, while if the received data is not a channel message, for example, control data, the data is stored as it is. This is processing for transmission.

Next, as shown in FIG. 7, at S300, the data stored in the waiting buffer
, First, the processing channel number is set to 1. At S310, one message is transferred from the time waiting buffer 21 corresponding to the set processing channel number to the transmission buffer 22 for one message.

At S320, it is determined whether the time stamp added to the transferred message is equal to or less than a value obtained by subtracting the delay amount (delay register value) stored in the delay register 24 from the time counter value. I do. Here, if a positive determination is made, the process proceeds to S340, while if a negative determination is made, the process proceeds to S350. That is, in this processing, the value obtained by subtracting the delay amount from the time counter value advanced from the time of the time stamp is compared with the value of the time stamp to obtain the difference (ie, the delay amount).
This is the process of delaying the timing of sound generation only.

In S340, since it is determined that the predetermined output timing has been reached in S330, the transmission buffer 2
2 is output as MIDI, and at S350, the processing channel number is incremented. In subsequent S360, it is determined whether or not the incremented processing channel number is greater than 16, and if a positive determination is made here, S31 is determined.
Returning to 0, the same comparison and transmission processing as described above is performed for the data of the next processing channel number. on the other hand,
If a negative determination is made here, the process proceeds to S370, where the time counter value is incremented, and the present process is temporarily terminated.

That is, in the processing of S300 to S370, it is sequentially checked for each channel whether or not it is time to output the performance data, and each M is sequentially checked.
This is a process for transmitting MIDI information to an IDI device. As described above, in the performance information communication apparatus 1 of the present embodiment, the channel message of the received MIDI data is stored in the time waiting buffer 21. Then, by comparing the value of the time stamp of the channel message stored in each time waiting buffer 21 with the value obtained by subtracting the delay amount from the time counter value, an optimum value is set according to the delay amount set for each channel. It can be transmitted to each MIDI device at an appropriate timing. As a result, based on the MIDI information adjusted to the appropriate sounding timing, the sounding operation is performed in each MIDI device, so that it is possible to perform an ensemble performance of excellent quality without deviation in performance.

Although the embodiments have been described above, the present invention is not limited to the above embodiments, but can be implemented in various modes.

[0033]

As described above, according to the present invention, the change time setting means sets the amount of change time for delaying the transmission timing of MIDI information in order to prevent a shift in performance between channels. The transmission timing of each of the plurality of channels can be delayed by the timing changing means based on the transmission timing set as appropriate.

In other words, according to the present invention, the transmission timing of MIDI information can be appropriately set, so that a plurality of MIDs including an acoustic musical instrument such as an automatic performance piano can be used.
By appropriately adjusting the sounding timing of the I-device, an ensemble performance with excellent quality can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a basic configuration of the present invention.

FIG. 2 is an explanatory diagram showing a system configuration of an ensemble performance using the performance information communication device of the embodiment.

FIG. 3 is a block diagram showing a main electrical configuration of the performance information communication device.

FIG. 4 is a block diagram showing a flow of communication data of the performance information communication device.

FIG. 5 is a flowchart showing a main routine of a process performed by the performance information communication device.

FIG. 6 is a flowchart showing a MIDI reception interrupt processing routine performed by the performance information communication device.

FIG. 7 is a flowchart showing a timer interrupt processing routine performed in the performance information communication device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Performance information communication apparatus 3 ... Sequencer 5, 6, 7, 8 ... MIDI equipment 14 ... Timer 17 ... MIDI receiving part 18 ... MIDI
Transmitter

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-229196 (JP, A) JP-A-2-201497 (JP, A) JP-A-63-30900 (JP, A)

Claims (2)

(57) [Claims] 1. Receiving means for receiving MIDI information of a plurality of channels, storage means for temporarily storing MIDI information received by the receiving means, reading means for reading MIDI information stored in the storage means, and reading means in performance information communication device and a transmission means for transmitting the MIDI information read by the transmission timing of the MIDI information transmitted by said transmitting means, the timing changing means for changing for each channel of said plurality of channels , In order to prevent a deviation in performance between the channels,
A change time amount for delaying the transmission timing,
A performance information communication device comprising: a change time setting unit configured to set the performance time corresponding to the performance device for each channel. 2. Corresponding to MIDI information of each channel
To, performance information communication apparatus 請 Motomeko 1 wherein you comprising the plurality of MIDI devices <br/> including acoustic instruments.