JPH08234735A - Automatic playing device - Google Patents

Abstract

PURPOSE: To easily vary characteristics of an effect adding circuit in synchronism with a musical performance by providing a control means which generate a control signal to an effect adding means in synchronism with the automatic musical performance of an automatic playing means. CONSTITUTION: This automatic playing device consists of a ROM 2 which stores a program and musical performance information, a central processing unit CPU 1 and a work area for controlling the whole automatic playing device according to the control program stored in the ROM 2, a RAM 3 as a buffer for storing the musical performance information, etc. Then the CPU 1 generates generates the control signal to a digital signal processor(DSP) 11 as the effect adding circuit which adds effects to an externally inputted signal in synchronism with the output of the DSP 11 and the automatic musical performance of the automatic playing means. Therefore, this device can automatically play an accompaniment, etc., and add effects changeable in characteristics in synchronism with the automatic musical performance alone. Further, control information of the DSP 11 can easily be added to optional musical performance information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic performance device, and more particularly to an automatic performance device having a built-in effect addition circuit and capable of controlling the effect addition circuit in synchronization with automatic performance.

[0002]

2. Description of the Related Art Conventionally, when changing the characteristics of an effect adding device (effector) in accordance with a performance, it is necessary to operate a switch or a knob of the effect adding device during the performance, so that it is not possible to concentrate on the performance. There was a point. So MID
Using an I-compliant effect addition device, MID such as a sequencer
The parameter change information of the effect addition device is stored in the I-compatible recorder, and the parameter of the MIDI compatible effect addition device is changed at the time of reproduction to automatically change the parameter.

[0003]

In the conventional control system for the effect adding device as described above, a MIDI sequencer and an effect adding device compatible with MIDI are required, and the sequencer has a track for controlling the effect adding device. If not, it was difficult to execute the control. The purpose of the present invention is to
SUMMARY OF THE INVENTION It is an object of the present invention to improve the above-mentioned problems of the prior art and to provide an automatic performance device in which the characteristics of the effect adding circuit can be easily changed in synchronization with the performance.

[0004]

According to the present invention, there is provided an automatic performance device having a performance information storage means and an automatic performance means for automatically performing a performance based on the stored performance information. And an effect adding means for adding and outputting an effect, and a control means for generating a control signal for the effect adding means in synchronization with the automatic performance by the automatic performance means.

[0005]

According to the present invention, effect adding means for adding an effect to a signal input from the outside and outputting the same to an automatic performance device,
Since the control means for generating the control signal to the effect adding means is added in synchronization with the automatic performance by the automatic performance means, the automatic performance such as accompaniment and the characteristic in synchronization with the automatic performance can be achieved by only one apparatus of this device. It is possible to add effects that can be changed.
Further, the control information of the effect adding circuit can be easily added to arbitrary performance information.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a circuit configuration of an automatic performance device to which the present invention is applied. CPU1 is RO
It is a central processing unit that controls the entire automatic performance device based on a control program stored in M2. CPU1
Includes a timer circuit that issues a timer interrupt to the CPU 1 at a set predetermined cycle. The ROM 2 stores performance information as well as programs. RA
M3 is used as a work area and a buffer for storing performance information. In addition, it has a battery backup so that it can retain the set information even when the main power is turned off. The panel 4 includes various switches, a display device for displaying characters and figures by liquid crystal or LEDs, and a panel interface circuit. The FDD (floppy disk drive) circuit 5 comprises an FDD and its interface circuit.

The tone generator circuit 6 reads out a musical tone waveform at an address interval proportional to the pitch to be generated from a waveform memory in which digital musical tone waveform information is stored, and multiplies the envelope signal to generate a musical tone signal. In practice, one tone generation circuit is configured to be capable of independently generating a plurality of tone signals at the same time by time-division multiplexing operation of one tone generation circuit. D / A
The converter 7 D / A converts the digital musical tone signal, and the amplifier 8
Amplifies the musical tone signal to drive the speaker 9. The bus 14 connects each circuit in the automatic performance device. In addition to this, a memory card interface circuit, a MIDI interface circuit, or the like may be provided if necessary.

The A / D converter 10 samples an analog signal input from an electric guitar or keyboard musical instrument connected to an external signal input terminal at a predetermined cycle and converts it into a digital signal. The DSP (digital signal processor) 11 includes a CPU and an RO including arithmetic circuits such as a multiplier.
It is a processor for programmable signal processing including M, RAM and the like. By setting parameters from the CPU 1 via the I / O interface circuit 12, the DSP 11 has distortion, delay (echo), reverb in addition to a digital filter having an arbitrary frequency characteristic with respect to an input digital signal. , Various effects such as chorus can be added. In addition, DSP11
Is configured to be directly connectable to the bus 14, the I / O interface circuit 12 is unnecessary. The adder 13 adds the output signal of the DSP 11 and the output musical tone signal of the tone generator circuit 6 and outputs the added signal to the D / A converter 7.

Next, the operation will be described. First, performance information will be described. As the performance information for automatic performance, any format can be used. For example, MIDI file format in which each performance information such as key-on and key-off has time difference information from the last performance information may be used. The performance information may include bar line information having time position information, and each performance information may have time difference information from the immediately preceding bar line information. Also, the effect addition circuit D
The control information of SP11 may be included in the performance information, but only the control information group may be stored as separate data, and the storage format in this case may be, for example, the same format as the performance information. . In the following embodiment, a case where the control information is stored separately will be described.

FIG. 5 shows the CPU 1 of the automatic performance device of the present invention.
5 is a flowchart showing the automatic performance process of FIG. Before entering the process of this flowchart, select the song to play,
The setting of parameters such as tempo has been completed, and this process is started by turning on the performance start switch, for example. In step S1, a timing counter that determines the performance timing of each performance data is reset. In step S2, the first performance data (for example, key-on information) is extracted from the performance data. In step S3, one initial control data item is extracted from the effector control data item. Both the performance information and effector control data formats are, for example, composed of bars of performance information or effector control information having bar line information and time difference information from the immediately preceding bar line information.

In step S4, it is determined whether or not the performance timing of the retrieved performance information has arrived.
This determination is made, for example, by comparing the value of the timing counter with the timing information added to the performance information, and the timing counter is reset each time the bar line time position arrives. If the determination result in step S4 is negative, the process proceeds to step S5, but if the determination result is affirmative, the process proceeds to step S6. In step S6, a known sounding process is executed. That is, if it is key-on information, a key assigning process is performed to select a sounding channel in the tone generator circuit 6 and allocate the sounding, and if it is key-off, the level of the corresponding sounding is attenuated. Open up. In the case of bar line information, the timing counter is reset as described above. In step S7, the next piece of performance information is taken out.

In step S5, as in step S4, it is determined whether or not the processing timing of the extracted effector control information has arrived. If the result is negative, the process returns to step S4, but if affirmative, step S4 is performed. The process moves to S8. In step S8, the CPU 1 transfers the control parameter included in the control information to the DSP 11 via the I / O interface circuit 12 to change the effect characteristic. Examples of effect types (and parameters for each effect) include distortion (depth, level, tone), delay (level, time, feedback,
Type), reverb (level, type, time, early reflection level), chorus (depth, tone, feedback, rate). Note that the program creation method of the DSP 11 for realizing these characteristics is well known. In step S9, the next effector control information is extracted. In step S10, for example, it is determined whether there is no performance information to be retrieved or whether the automatic performance has ended by detecting the end information. If the result is negative, the process returns to step S4, but if affirmative. Ends the automatic performance process.

Step S6 is a flowchart showing the timer interrupt processing of the CPU 1. This process is activated by the timer interrupting at a predetermined cycle, and in step S20, a predetermined value is added to a timing counter for determining the timing of performance information sound generation. This predetermined value is proportional to the music tempo information.
With the configuration and processing as described above, if the change contents and timing of the effector are input to the device in advance, the characteristic of the effector can be changed in synchronization with the automatic performance, and the performer can concentrate on the performance.

FIG. 2 is a block diagram showing the circuit configuration of the second embodiment of the present invention. In the above-mentioned first embodiment, the DSP 11 is used only for giving the effect of the analog signal input from the outside, but in the second embodiment, it is used for filtering or giving the effect of the tone signal generated internally. Is also an example of using the DSP 11. In FIG. 2, both the output signal from the A / D converter and the output signal of the tone generator circuit 6 are input to the DSP 11. The outputs of the tone generator circuit 6 are all added and input, or individually input for each sound generation channel. These signals are internally added at a fixed ratio, or they are individually subjected to filter processing or effect imparting processing, and if they are processed separately, they are added and output to the D / A converter 7. It With such a configuration, it is not necessary for the CPU 1 to perform the effect addition process on the tone generator circuit 6, and it is not necessary to provide a filter in the tone generator circuit 6.

FIG. 3 is a block diagram showing the circuit configuration of the third embodiment of the present invention. In this embodiment, the automatic musical instrument does not have a tone generator circuit, but instead has a MIDI interface circuit 15. Then, the automatic performance data is output to the outside as a MIDI signal, a tone signal is generated by the external sound source device 16, and is sounded from the speaker 17. As the processing of the CPU 1, the performance signal may be transmitted as a MIDI signal in the sound generation processing of step S6 of FIG. FIG. 4 is a block diagram showing the circuit configuration of the fourth embodiment of the present invention. This embodiment is an example in which an analog effect (effect adding) circuit 18 is used as the effect adding circuit. The analog effect circuit whose characteristics can be controlled can be easily realized by using, for example, a variable gain amplifier or a BBD (analog signal delay element). In the case of this example, the output of the tone generator circuit 6 is D /
After A conversion, the analog adder (mixer) 19 adds the output of the analog effect circuit 18.

Although the embodiment has been described above, the following modifications are also possible. The parameter set in the DSP may be included in the effector control information, but a specific code is made to correspond to a parameter group including a plurality of parameters for giving a specific effect, and the effector control information Alternatively, the code may be stored in the memory, and when the code is read, it may be converted into a parameter group and transferred to the DSP. The signal input from the outside may be a digital signal, and in this case, the A / D converter 10 is unnecessary. Although an example of synchronizing with automatic performance is disclosed as an embodiment, for example, by operating a panel switch or a connected foot switch or a MIDI input signal, a preset parameter group is read out one by one and D is read.
The timing for controlling the effect addition characteristic may be manually or externally controlled by setting SP.

[0017]

As described above, according to the present invention,
An effect adding means for adding an effect to a signal inputted from the outside and outputting the signal to the automatic performance device, and a control means for generating a control signal for the effect adding means in synchronization with the automatic performance by the automatic performance means. Since this is added, there is an effect that it is possible to add an automatic performance such as an accompaniment or the like and an effect in which the characteristic can be changed in synchronization with the automatic performance with only this device. Further, there is an effect that the control information of the effect adding circuit can be easily added to arbitrary performance information. Therefore, the performer can concentrate on the performance.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of an automatic performance device of the present invention.

FIG. 2 is a block diagram showing a circuit configuration of a second exemplary embodiment of the present invention.

FIG. 3 is a block diagram showing a circuit configuration of a third exemplary embodiment of the present invention.

FIG. 4 is a block diagram showing a circuit configuration of a fourth exemplary embodiment of the present invention.

FIG. 5 is a flowchart showing an automatic performance process of the CPU 1 of the automatic performance device of the present invention.

FIG. 6 is a flowchart showing a timer interrupt process of CPU 1.

[Explanation of symbols]

1 ... CPU, 2 ... ROM, 3 ... RAM, 4 ... Panel, 5
… Floppy disk drive circuit, 6… Sound source circuit, 7…
D / A converter, 8 ... Amplifier, 9, 17 ... Speaker, 10
... A / D converter, 11 ... DSP, 12 ... I / O interface circuit, 13 ... Adder, 14 ... Bus, 15 ... MI
DI interface circuit, 16 ... Sound source device, 18 ... Analog effect circuit

Claims (2)

[Claims] 1. An automatic performance device having a performance information storage means and an automatic performance means for automatically performing performance on the basis of the stored performance information, and further adding and outputting an effect to a signal input from the outside. An automatic performance apparatus comprising: an effect adding means and a control means for generating a control signal for the effect adding means in synchronization with an automatic performance by the automatic playing means. 2. The automatic performance device includes a tone signal generating means, control information for the effect adding means is added to the performance information, and the effect adding means is constituted by a digital signal processor. The automatic musical instrument according to claim 1, wherein the automatic musical instrument is a musical instrument.