JP3100293B2 - Switching apparatus and switching method of musical sound data - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a musical sound data switching apparatus and method capable of realizing multiple functions by efficiently inputting / outputting and processing a large number of sound data of a large number of systems.

[0002]

2. Description of the Related Art As shown in FIG. 8, the basic components of a conventional data switching device are an analog-to-digital converter (hereinafter referred to as an A / D converter) 1 for inputting analog audio data IA, and A signal processing unit 2 for processing the acoustic data ID converted into a digital signal by the A / D converter 1
And a digital-analog converter (hereinafter referred to as a D / A converter) 3 for converting the digital audio data OD processed by the signal processing unit 2 into analog audio data OA.
And a system controller 4 such as a CPU that controls the signal processing unit 2. Such a device is connected to an electronic musical instrument, an audio device, or a device that generates a tone signal such as a microphone, and performs sound effect processing such as echo, reverb, phase shift, and flanger. Also, an electroacoustic device incorporating this device is known.

In recent years, a digital signal processor (hereinafter, referred to as a DSP) has been increasingly used for the signal processing unit 2. By using this DSP, the function of the electroacoustic apparatus has been advanced, and complicated processing has become possible. Examples of electroacoustic devices using this DSP include:
Japanese Patent Application No. 4-34606 already filed by the present applicant.
3, Japanese Patent Application No. 5-043933, Japanese Patent Application No. 6-3860
There is an apparatus disclosed in the specification of No. 8.

[0004]

However, the conventional apparatus is composed of a combination of one system of analog input, A / D converter 1, signal processing unit 2, D / A converter 3, and analog output as described above. It was just being done. Further, in the conventional apparatus, even if a large number of input terminals are provided, the input is selectively input to the A / D converter 1 using a manual changeover switch, or the A / D converter is prepared by mixing a plurality of sound input data. It was only a configuration to input to 1. For this reason, it is difficult for a conventional device to process a large number of sound input data. For example, it is necessary to use a plurality of devices having the configuration shown in FIG.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to enable processing of a large number of audio input data of a large number of systems.

[0006]

In order to achieve the above object, the present invention comprises a plurality of A / D converters and D / A converters for inputting / outputting a large number of acoustic data. And whether audio data is input and output to and from the computer.

[0007]

As a result, according to the present invention, a large number of multi-system acoustic data can be efficiently processed by one apparatus.

[0008]

[Examples] 1. Circuit diagram of an input portion of the entire circuit diagram 1 the data switching apparatus, FIG. 2 is a circuit diagram of the signal processing unit, FIG. 3 is a circuit diagram of the output section. This device is a single device connected to a device for generating a tone signal such as an electronic musical instrument, an audio device, or a microphone, or an internal device incorporated in an electronic acoustic device.

[0009] 2. Input Unit A large number of analog audio data IA1 to IAn of n systems are input to the input unit of FIG. These acoustic data IA1 to IAn are composed of n A / Ds provided one-to-one.
Input to the converters AD1 to ADn, the A / D converter AD1
ＡＤADn to be converted into digital acoustic data ID1 to IDn. These digital sound data ID1 to IDn
Is input to the multiplexer 11. The multiplexer 11 selects and outputs one of a plurality of inputs ID1 to IDn in response to a select command signal CM1 given from the select circuit 21. The select circuit 21 includes a select register 31 and a data selector 32.

The data selector 32 responds to a switching signal CN1 given from the system controller 10 to select data S generated from the system controller 10.
D1 is fetched and sent to the select register 31. The select register 31 sequentially shifts the select data SD1 supplied from the data selector 32 in synchronization with the channel clock signal CHφ supplied from the clock oscillator 9, and shifts the select data SD1 to the multiplexer 11 as a select command signal CM1.
Send to The cycle of this channel clock signal CHφ is
It is equal to the division time of the time division processing of the entire apparatus.

Switching signal C from system controller 10
Until N1 is supplied, the data selector 32 repeatedly outputs the output data CM1 of the select register 31. That is, the select command signal CM1 applied from the select circuit 21 to the multiplexer 11 does not change until new select data SD1 is generated from the system controller 10. The select circuits 22 to 25 in FIGS. 2 and 3 have the same configuration as the select circuit 21 and perform the same operations. The switching signals CN2 to CN5 are sent from the system controller 10 to the select circuits 22 to 25.
And select data SD2 to SD5.

The system controller 10 comprises a CPU 7, a memory 8, a clock oscillator 9, and the like.
The system controller 10 performs system processing in the electronic acoustic device such as a musical sound generation processing and a sound effect processing according to various data. This system controller 1
0 can be replaced by a DSP (or DSPs 16, 17,...).

[0013] 3. 2. Signal Processing Unit The signal processing unit of FIG. 2 includes two digital signal processors (hereinafter referred to as DSPs) 16 and 17, two demultiplexers 13 and 14, and a multiplexer 12.

The DSPs 16 and 17 perform calculations for various types of sound effect processing, and generate various types of data in a time-sharing manner. These various data are frequency modulation data, amplitude modulation data, address data, musical tone waveform data, envelope data, effect data (including filter characteristic data), and the like. The processing contents of the DSPs 16 and 17 are as follows:
DSP11 in FIG. 1 of Japanese Patent Application No. 4-3460063, DSP21 in FIG. 1 of Japanese Patent Application No. 5-43933, and Japanese Patent Application No. 6-38.
608 is the same as that of the DSP 11 in FIG. This processing is not described here to avoid long culture.

The input side demultiplexer 13 outputs the output signal SI of the multiplexer 11 of FIG.
7 and an output side multiplexer 12. The multiplexer 12 on the output side includes DSPs 16 and 17
Output signals DS1, DS2, and demultiplexer 1
3 is selectively output from the multiplexer 11 shown in FIG.

The output demultiplexer 14 selectively supplies the output signal SO of the multiplexer 12 to the DSPs 16 and 17 and the demultiplexer 15 of FIG. The selection of the input / output of the demultiplexers 13 and 14 and the multiplexer 12 is performed by the switching signals CM2, CM3 and CM4 from the select circuits 22 to 24.

[0017] 4. Output Unit The output unit of FIG. 3 is provided with n D / A converters DA1 to DAn for outputting a large number of analog audio data OA1 to OAn of n systems. The demultiplexer 15 selectively outputs the input SO to the n D / A converters DA1 to DAn in response to a select command signal CM5 given from the select circuit 25.

[0018] 5. Determination process Figure 4 of the input and output, among the various processes executed in the system controller 10 is a flowchart of a process for determining the lineage of the input and output. This processing is performed when an input / output system is switched by an operator's manual switch operation, when an input / output system switching command is issued during a previously programmed automatic switching operation, or when switching from an external device is performed. When a command is input, it is executed as a subroutine.

First, the CPU 7 reads out the musical factor data stored in the memory 8 (step S01),
Select data according to this musical factor data,
The data is read from the table in the memory 8 (step S02).
The musical factor data includes timbre data, sound field data, pitch (range) data, performance part data, tone part data, musical instrument part data, touch data, tempo data,
This is information that is a factor for determining the input / output system, such as the elapsed sounding time. The musical factor data is generated by a manual switch operation, a programmed automatic setting operation, or a setting command input from an external device, and is stored in the memory 8.

As shown in FIG. 5, the select data table in the memory 8 stores a combination of input / output systems corresponding to each musical factor. Each select data is composed of select data SD1 applied to the select circuit 21 of the input unit, select data SD2 to SD4 applied to the select circuits 22 to 24 of the signal processing unit, and select data SD5 applied to the select circuit 25 of the output unit. I have. The select data SD1 to SD5 read in accordance with the musical factor correspond to the corresponding select circuits 21 to 2
5 (step S03). Then, the processing of the CPU 7 returns to the main routine.

[0021] 6. Types of system As described above, in this apparatus, the multiplexers 11 and 12 and the demultiplexers 13 to 15 can select an input / output flow and a system (path) of data processing. There are roughly the following types of input / output systems.

First, after the outputs ID1 to IDn of the A / D converters AD1 to ADn are input to the first DSP 16 and processed, the output of the DSP 16 is converted to the D / A converters DA1 to DAn.
There is a system that outputs from An. A / D converters AD1 to A
Dn to be selected, and D / A converters DA1 to DA1
The system controller 10 determines which of DAn to select.

Next, after the outputs ID1 to IDn of the A / D converters AD1 to ADn are input to the second DSP 17 and processed, the output of the DSP 17 is converted to the D / A converters DA1 to DAn.
There is a system that outputs from An. The same input data IA1
Even with IAn, different sound effects can be obtained by making the processing different.

Further, this apparatus comprises A / D converters AD1 to AD1.
After the outputs ID1 to IDn of ADn are input to the first DSP 16 and processed, the output of the DSP 16 is connected to the second DS16.
The data can be input to P17 and reprocessed. vice versa,
The output of the second DSP 17 can be input to the first DSP 16 and reprocessed. In addition, the first or second D
The outputs of the SPs 16 and 17 can be subjected to feedback processing. The processed data SO is supplied to the D / A converters DA1 to DA1.
When one of DAn is selected, it is output as an analog signal.

Further, this device includes an A / D converter AD1
To the output ID1 to IDn of the multiplexer 1
1, through one of the D / A converters DA1 to DAn (data through) through the demultiplexer 13, the multiplexer 12, the demultiplexer 14, and the demultiplexer 15.

[0027] 7. Other Embodiments The present invention is not limited to the above embodiments, and can be variously modified without departing from the spirit of the present invention. For example, all or a part of the multiplexers 11 and 12 and demultiplexers 13 to 15 for selecting an input / output system can be replaced with an AND gate group (which constitutes a data selector circuit) or a digital switch group. For example, FIG.
The configuration is as shown in FIG. A / D converters AD1 to A
The output ID1 to IDn of Dn are n multiplexers 31
To 3n. Then, the inputs ID1 to IDn are selected by the select circuit 26.

Outputs SI1 to SI1 of multiplexers 31 to 3n
SIn is connected to the demultiplexers 41 to 4n in FIG.
Is entered. By the select circuit 27, any of the outputs SI1 to SIn is applied to any of the n OR gates 51 to 5n.
Is given. And the OR gates 51 to 5
n is converted into an analog signal by the D / A converters DA1 to DAn and output. The input / output signal system includes a data through system, a DSP processing system, and a feedback processing system, as in the above embodiment.

The multiplexers 11, 12
All or a part of the demultiplexers 13 to 15 may be replaced with a manual switch. Thereby, the degree of freedom of the manual operation of the operator is increased, and the sound effect according to the intention of the operator can be obtained by the manual operation.

Further, the DSP for processing the sound data includes:
One, or three or more. Also, DS
A configuration in which acoustic data is processed using an arithmetic processing unit (for example, a CPU or the like) other than P is also possible. The claims at the time of filing the present application are as follows. [A] A plurality of analog-to-digital conversion means for converting input analog audio data into digital audio data, and any of the analog-to-digital conversion means First determining means for determining whether to be input to
According to the decision result of the first decision means, the sound data is input to any of the plurality of analog-digital conversion means, or the sound data is output by any of the analog-digital conversion means. A first selection unit, an audio data processing unit that processes digital audio data from the analog-digital conversion unit selected according to the selection of the selection unit, and a digital data processed by the audio data processing unit. A plurality of digital-to-analog conversion means for converting sound data into analog sound data; and determining to which digital-to-analog conversion means the sound data inputted to the plurality of digital-to-analog conversion means is to be inputted. Second determining means for performing
According to the determination result of the second determining means, the sound data is input to any of the plurality of digital-analog converting means, or the sound data is output by any of the digital-analog converting means. A data switching device, comprising: a second selection unit. [B] The data switching device according to claim A, wherein the first and second determining means determine based on an operation of an operator. [C] The data switching device according to claim A, wherein the first and second determining means determine based on a musical factor. [D] The data switching device according to any one of claims A, B and C, wherein the first and second selection means are constituted by an AND gate group. [E] The data switching device according to any one of claims A, B and C, wherein the first and second selection means are manual switches. [F] The first and second selecting means are a multiplexer and a demultiplexer.
The data switching device according to any one of B and C. [G] A plurality of the sound data processing means are provided, and processing of digital sound data from the analog-digital conversion means, processing of digital sound data from other sound data processing means, or after processing The data according to any one of claims A, B, C, D, E, and F, wherein two or more operations of supplying digital audio data to the digital-analog conversion means are performed. Switching device.

[0030]

As described above in detail, the present invention includes a plurality of A / D converters and D / A converters, and determines which of these A / D converters should receive and input acoustic data. Accordingly, an A / D converter and a D / A converter are selected. As a result, the present invention can efficiently process a large number of multi-system acoustic data with a single device.

Therefore, according to the present invention, the effect device can be made much more multifunctional than before, and the range of application can be expanded.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of an input unit.

FIG. 2 is a circuit diagram of a signal processing unit.

FIG. 3 is a circuit diagram of an output unit.

FIG. 4 is a flowchart of an input / output system determination process of a system controller.

FIG. 5 is a diagram showing a select data table in a memory.

FIG. 6 is a diagram showing another embodiment of the input unit.

FIG. 7 is a diagram showing another embodiment of the output unit.

FIG. 8 is a circuit diagram of a conventional device.

[Explanation of symbols]

10 System controller, 11, 12 Multiplexer, 13-15 Demultiplexer, 16, 17 D
SP, 21 to 25... Select circuit, IA1 to IAn... Analog sound data input.

Claims (3)

(57) [Claims] 1. A plurality of analog-to-digital conversion means for converting inputted analog musical sound data into digital musical sound data, and music inputted to the plurality of analog-digital converting means.
Which sound- acoustic data is to be input to which analog-digital conversion means is determined by timbre data, pitch data or
First determining means for determining based on the touch data; and selecting one of the plurality of analog-digital converting means in accordance with a determination result of the first determining means.
First selecting means for inputting musical sound data or selecting one of the plurality of analog-to-digital conversion means and outputting the musical sound data; selected Te, analog - digital and acoustic data processing means for processing the digital tone sound data from the conversion means, musical sound analog to digital tone sound <br/> sound data processed by the sound data processing unit a plurality of digital converting the data - analog conversion means, the plurality of digital - easy inputted to analog conversion means
Which sound- acoustic data is to be input to which digital-analog conversion means is determined by timbre data, pitch data or
A second determining means for determining based on the touch data; and selecting one of the plurality of digital-analog converting means in accordance with a determination result of the second determining means.
Second selecting means for inputting musical sound data or selecting one of the plurality of digital-analog converting means and outputting the musical sound data. Switching device for musical sound data . 2. A plurality of sound data processing means are provided, for processing digital tone sound data from the analog-to-digital conversion means, or processing digital sound sound data from another sound data processing means. , or after processing digital tone sound data of the digital -
2. The musical sound data according to claim 1, wherein two or more operations of the supply to the analog conversion means are performed .
Switching device . 3. A plurality of analog-to-digital converters for converting input analog musical sound data into digital musical sound data, wherein the musical sound data input to the plurality of analog-digital converters is: Which of the analog-to-digital conversion means is to be input is determined based on tone color data, pitch data or touch data, and one of the plurality of analog-to-digital conversion means is selected according to the determination result. And inputting the musical sound data or selecting one of the plurality of analog-digital converting means to output the musical sound data, and selecting the digital data from the selected analog-digital converting means. Processes musical sound data and converts the processed digital musical sound data to analog musical sound data For a plurality of digital-analog converting means, tone tone data and pitch data indicate to which digital-analog converting means the musical sound data input to the plurality of digital-analog converting means should be input. Or, it is determined based on the touch data. According to the determination result, one of the plurality of digital-analog converting means is selected and the musical sound data is input, or the plurality of digital-analog converting means are selected. A method for switching musical sound data, wherein any one of the methods is selected to output the musical sound data.