JPS6118995A - Performance system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a performance system comprising a waveform information processing device and a musical tone generation device.

[Background of the invention]

Traditionally, computers have been used to obtain various sound source waveforms,
Alternatively, PCM (Pulse Code
Modulation) Recording is performed to obtain a sound source waveform, and musical tones are obtained from this. However, if the CPU that processes waveforms and the musical sound generation block that generates musical tones share one memory, and the CPU is performing waveform generation processing, musical tones cannot be generated or musical tones cannot be generated. When the CPU
However, there were problems with the lack of versatility, such as the inability to perform waveform generation processing.

[Purpose of the invention]

The present invention has been made in view of the above points, and an object thereof is to provide a performance system with a high degree of freedom and versatility.

[Summary of the invention]

The main point of this invention is that waveform information can be easily transferred between a waveform information processing device and a musical tone generating device. The present invention provides a performance system that enables a main CPU to access the buffer memory by disconnecting a sub CPU in a generator from a buffer memory.

〔Example〕

The present invention will be described with reference to an embodiment shown in the drawings. 1st
The figure shows the overall configuration of the performance system. In this embodiment, a personal computer 1 is used as the waveform information processing device.
is used.

This personal computer 1 can store software for executing waveform processing, which will be described later, and the central processing unit 4 uses waveform information, envelope information, overtone information, etc. input from the keyboard 2, digitizer 3, etc. In addition, this personal computer 1 has a CRT 5 that can display input waveform information or waveform information transferred from a musical tone generator described later. ing.

A plurality of musical tone generating devices can be connected to this personal computer 1, and in this embodiment, electronic keyboard instruments 10, 20, . . . can be connected as musical tone generating devices. This electronic keyboard instrument 10°20...
have the same configuration, but when they are connected, it is possible to identify, for example, what number of connection state they are in from the personal computer 1 by a specific key operation or a control signal from the personal computer 1, Each can be controlled independently.

And for electronic keyboard instruments 10, 20,...
Keyboard 11.21,..., Speaker 12.
22, . . . In addition, as shown in FIG. 1, the electronic keyboard instrument 10 is connected to a microphone 100 for recording external natural sounds etc. using PCM and making it into a sound source waveform. . Of course, this microphone 100 can be used with other electronic keyboard instruments 20. ...can also be installed.

Next, the circuit configuration of this embodiment will be explained with reference to FIG. The personal computer 1 includes a main CPU 6 provided in the central processing unit 4, a main memory 7 consisting of a memory provided in the central processing unit 4 or other connected memory, each of the above-mentioned keyboards, a digitizer 3, a CRT 5, etc. The main CPU 6, main memory 7, and each peripheral device 8 are connected via a common bus CBUS. Also, the main CP
U6 is connected to a data bus DBUS for transferring data to the electronic keyboard instruments 10, 20, . . . and a command bus IBUS for transferring various commands. A command boat 9 is further connected to the .

The data bus DBUS described above is connected to the electronic keyboard instruments 10.20, . . . via the bus controllers 3, 23 in the respective electronic keyboard instruments 10.20, . Connected to internal common bus KBUS. The command boat 9 of the personal computer 1 transfers command signals to the electronic keyboard instruments 10, 20, . Make it.

And electronic keyboard instruments 10, 20. . . ., sub CPUs 14.24, . . . , buffer memories 15.25, .
6, . . . are connected to each other.

That is, the sub CPUs 14.24, .
0 performs internal processing, backup memory 15.2
5. Do this using a predetermined area. For example, the processing includes detecting the operation of the keyboard 11, 21, . Further, the sub CPUs 14, 24, . . . control the musical tone memory 17, .
, . . . to specify reading or writing.

That is, the musical tone memories 17, .
The waveform information transferred from the personal computer 1 is stored, used as a sound source waveform, and read out at a speed corresponding to the musical scale to the D/A converters 18 and 28.
, . . ., the signal is converted into an analog signal, amplified appropriately, and outputted from the speakers 12, 22, . . . .

Furthermore, the external sound signal input from the microphone 100 is
The A/D converters 19, 29, . . . convert it into a digital signal, which is then stored in the musical tone memory 17, .
. . . can be stored under the control of the musical tone memory control section 16. Further, the waveform information stored in the musical tone memory 17, . . . is stored in the musical tone memory control units 16, 26, .
Backa memory 15.25 by ... and DM
A transfer is possible, and microphone 10
The waveform information input and recorded at step 0 is stored in the instrument memory 17,...
The data is transferred from there to the buffer memories 15, 25, .

Next, the operation of this embodiment will be explained. The partial computer 1 can perform the following waveform processing.

First, from an input device such as the digitizer 3, waveform information of a predetermined period of the waveform, for example, one period, is inputted, and envelope information for this waveform is inputted, and from these two pieces of information, the waveform from the beginning of the waveform to the end of the waveform is calculated. Generates waveform information to be expressed. This process is performed by performing calculation control of the main CPU 6 from the waveform information and envelope information stored in the main memory 7. Further, the personal computer 1 is capable of preparing in advance a plurality of sets of waveform information representing the waveform from the beginning to the end of the waveform obtained as described above, and adding and synthesizing the sets. In this case, new waveform information can be obtained by adding and combining two pieces of waveform information stored in the main memory 7 in the main CPU 6.

In this case, if waveform information is selected from the fundamental wave of a sine wave to higher-order harmonics, waveform information based on the sine wave synthesis method can be obtained.

In addition, the personal computer 1 can multiply new envelope information by new waveform information representing the waveform from the beginning to the end of a predetermined waveform, and calculate waveform information with a new envelope. It becomes possible to do so.

The waveform information obtained with this quality is stored in the main memory 7. Then, in the main cPU 6, any electronic keyboard instrument 10.20. Decide whether to forward it to...
The electronic keyboard instrument you are about to transfer to the command boat 10.20. ``!#(
For example, if the musical tone memory 17 is divided into a plurality of pulls, data specifying the musical tone memory 17, etc., and various other commands are transferred.

Therefore, these commands are latched in all bus controllers 13, 23,... and then sent to the main CP.
U6 sends an intabto signal to the sub CPUs 14, 24, . . . . . , and temporarily stop the currently executing process,
3. ...The command latched to the sub CPU 14
．． 24, ... is loaded.

As a result, electronic keyboard instruments 10, 20. A match is detected with each number of..., and the matched electronic keyboard instrument, for example, the electronic keyboard instrument 10, proceeds to the next process according to the transfer command, and the other electronic keyboard instrument 10 The electronic keyboard instruments 20, . . . return to the processing before the interplay.

Therefore, the other electronic keyboard instruments 20, . . . perform the same performance processing as before.

In the electronic keyboard instrument 10, since the transferred command is a write command, the sub CPU 14 and the buffer memory 15 are disconnected, and the main CPU 6 can directly manage the buffer memory 15. Note that at this time, the common bus KBUS is set to high impedance.

As a result, the waveform information is transferred from the main memory 7 to the buffer memory 15 by DMA.

Then, when the processing is finished, the main CPU 6
' is buffer memory 1 for server 17' cPU14.
A command is issued to transfer the contents of 5 to the musical tone memory 17, and the interactive state is canceled.

Therefore, when the electronic keyboard instrument 10 returns to its normal state, the contents of the buffer memory 15 are transferred to the musical tone memory 17 by DMA transfer by the musical tone memory control section 16.

In this way, the waveform information generated by the personal computer 1 can be transferred and recorded in the musical tone memory 17 of the specified musical tone generating device 10.

Next, a description will be given of the operation in the case where waveform information obtained by, for example, recording an external sound and sampling the waveform information and storing it in the musical tone memory 17 is transferred to the personal computer 1.

In this case as well, the main CPU 6 gives predetermined commands to the bus controllers 13, 23, . . . via the command boat 9 in the same manner as described above. As a result, for example, when transferring waveform information stored in the electronic keyboard instrument 10 to the personal computer 1, the sub CPU 1
4 enters an interoperable state according to a command stored in the bus controller 13. At this time, since the read command is given from the main CPU 16, the waveform information is DMA-transferred from the musical tone memory 17 to the buffer memory 15 under the control of the musical tone memory control section 16. When the process is completed, the sub CPU 14 sets the common bus KBUS to high impedance and sends an acknowledge signal to the bus controller 13.

As a result, the lotus controller 13 is the common bus K B
US and a data bus DBUS are connected so that the main CPU 6 can directly manage the buffer memory 15.

As a result, the main CPU 6 can access and process the contents of the buffer memory 15, or can DMA transfer and copy the contents of the buffer memory 15 to the main memory 7.

Then, when the processing is finished, the main CPU 6 releases interactivity with the sub CPU 14. In addition,
At that time, if a command to transfer the contents of the buffer memory 15 to the tone memory 17 is given to the bus controller 13, the sub CPU 14 causes the contents of the buffer memory 15 to be transferred to the tone memory 17 by DMA.

In this way, in this embodiment, the personal computer 1 can be connected to any of a plurality of electronic keyboard instruments and data can be sent and received, so it is versatile and can be used even when the personal computer 1 is in the process of generating waveforms. However, each electronic musical instrument can operate without being affected in any way, and has a high degree of freedom as a system.

In the above embodiment, the personal computer 1 functions as a waveform processing device, but it may be another computer or a waveform processing device having dedicated hardware.

Further, in the above embodiment, an electronic keyboard instrument is used as the musical tone generating device, but it does not necessarily have to be an instrument with a keyboard, as long as it generates musical tones according to the waveform information transferred from the waveform processing device. good.

Further, in the above embodiment, the external sound signal inputted from the microphone 100 is A/D converted by the electronic keyboard instrument 10, 20, . . . to obtain a digital waveform signal. The execution process may be performed by

Further, in the above embodiment, the personal computer 1 includes:
Electronic keyboard instrument 10.20. ... are connected in series, but it goes without saying that they may be connected in parallel.

[Effects of the Invention] As described in detail above, the present invention allows data transfer between the waveform processing device and the musical tone generating device to be easily performed, and independent processing can be simultaneously executed by the waveform processing device and the musical tone generating device.
Since the CPU of the waveform processing device and the buffer memory in the tone generating device are connected to perform various processing only when necessary, excellent effects are achieved in terms of versatility and freedom.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being a perspective view of its appearance and FIG. 2 being a circuit configuration diagram thereof.

Claims (1)

[Scope of Claims] A waveform information processing device having a main CPU and a main memory, and storing desired waveform information obtained by processing in the main CPU in the main memory; A sub-CPU, a buffer memory controlled by the sub-CPU, and a musical tone memory that transfers waveform information to the buffer memory;
and digital-to-analog conversion means for converting the waveform information stored in the musical tone memory into an analog musical tone signal, and upon designation of the main CPU, the connection state between the sub CPU and the buffer memory is released, and the main CPU A performance system comprising a musical tone generator capable of accessing the buffer memory.