JPH03264998A - Electronic player - Google Patents

Abstract

PURPOSE:To obtain the electronic player which is convenient, good in operability, and musically satisfactory by inputting and storing a digital signal representing a composite waveform signal generated and outputted by a synthesizing means as a new digital waveform signal in an area of a waveform memory means which is specified by a control means. CONSTITUTION:Waveform signals can be read and written independently of one another over four waveform read/write channels of a sound generation control part 8 and the same or different digital signals are read out of a waveform memory 7 over at least two channels. After independent timbre and loudness control is performed by VCFs 12a - 12d and VCAs 13a - 13d, the signals are mixed and written as a new sound source signal in the waveform memory 7 by using specific channels. Consequently, an overdiving function can be filled up and made favorite. Consequently, the electronic player which is convenient, good in operability, and musically favorite can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electronic performance device that writes an input waveform signal in digital representation into a waveform memory means, reads it out, converts it into an acoustic signal, and outputs it.

[Background of the Invention] Various types of electronic performance devices as described above have been developed in the past, and one type of such devices is a device called a sampling machine. In this type of device, after obtaining a composite waveform signal by superimposing acoustic signals input and stored in advance,
There are also plans to create a device with the ability to digitally record it, but all of them have been incomplete.

In addition, for example, as a disclosure of prior art,
-There is an IE36898 publication. In this precedent example, the musical tone data already stored in the musical tone data memory (
It only stores new musical tone data (waveform data) overlappingly (that is, synthesizes it) with waveform data (waveform data), but it also reads out multiple pre-stored waveforms and performs predetermined characteristic changing processing before synthesizing them. is not considered, and the performance results are still unsatisfactory.

[Object of the Invention] The present invention has been made in view of the above points, and an object thereof is to provide an electronic performance device that is simple, easy to operate, and musically satisfying.

[Summary of the Invention] The present invention has been made to achieve the above-mentioned object, and uses at least two channels of a plurality of waveform read/write channels to read a plurality of digital waveform signals from a waveform memory means. The readout digital waveform signal is processed to change its characteristics with a manually set degree of change, and then synthesized and digitally recorded again in the waveform memory means through a predetermined waveform read/write channel. The main point is what you did.

[Example] The present invention will be described in detail below with reference to an example shown in the drawings. FIG. 1 shows the circuit configuration of this embodiment, and shows the input signal (
IN) is suitably amplified by an input amplifier 1, then supplied to an analog adder circuit 2, furthermore, a filter 3 removes high-frequency components, and then a sample-and-hold circuit (
The signal is sampled by S/H) 5 at an appropriate sampling frequency and supplied to an A/D converter 6. The left A/D converter 6 converts the input analog signal l into a corresponding digital signal and supplies it to the sound generation control section 8.

This sound generation control section 8 includes, for example, four waveform read/write channels, each of which can independently write or read waveform signals into or from the waveform memory 7. This sound generation control section 9
The specific configuration is described in Japanese Patent Application No. 59-167119, so a detailed explanation thereof will be omitted.

This sound generation control section 8 operates based on the control from a CPU 9 consisting of a microcomputer, etc., and corresponds to the four waveform read/write channels of this sound generation control section 8, so that a maximum of 4 A digital signal corresponding to the sound is read out from the waveform memory 7, applied to the D/A converter 10 in a time division manner, and then supplied to sample and hold circuits (S/H) 11a to 11d.

The sample hold circuits 11a to 11d perform a sampling operation for each time-division processing channel time in response to timing signals t, to t4, which will be described later.

The voltage signals held in the sample and hold circuits 11a-lid are supplied to VCFs (voltage controlled filters) 12a-12d in a corresponding manner. Each of the VCFs 12a to 12d receives a voltage signal FCVI, which will be described later.
~FCV4 is supplied, and this voltage signal FCVI~FCV
4, the filtering process is performed independently.

The vCFs 12a to 12d send filtered analog waveform signals to vCAs (voltage controlled amplifiers) 13a to 13d.

The amplification factors of the VCAs 13a to 13d are independently controlled by the supplied control voltage signals ACV1 to ACV4, and the output level or volume envelope of the waveform signals supplied from the VCFs 12a to 12d is determined.

The output signals of the VCAs 13a to 13d are sent out as outputs OUT1 to OUT4 of each channel, respectively, and are appropriately amplified and then emitted as sound signals. Further, the outputs of the VCAs 13a to 13d are supplied to an analog adder circuit 14, mixed, and can be outputted to the outside as a mixed output OUTMIX.

In addition, VCF12d corresponding to the fourth channel mentioned above
The output of the analog adder circuit 14 and the output of the analog adder circuit 14 are supplied to an analog switch 15 that performs a switching operation according to a control signal from the CPU 9 described above.

This analog switch 15 connects the output of the VCF 12d,
The output of the analog adder circuit 14 is selected, and the VCA (
Voltage controlled amplifier) 1B.

In VCA I Et, the supplied control voltage signal ACV
The signal is amplified in accordance with O, and is fed back and supplied to the analog adder circuit 2 described above.

Therefore, the external sound signal supplied via the input amplifier 1,
The waveform signal obtained by reading out the waveform memory 7 can be mixed by the analog adder circuit 2 and supplied to the waveform memory 7 again.

Reference numeral 4 in the figure denotes a keyboard/display unit consisting of a keyboard with performance keys and various control switches, and a liquid crystal display panel for displaying various statuses, and the CPU 9 and this keyboard/display unit 4 exchange data. I do.

In addition, this CPU 9, through software processing, each of the above-mentioned control signals FCV1 to FCv4, ACV engineering to ACV4,
In order to generate ACVO (hereinafter collectively referred to as control signal CV), a digital signal is supplied to the D/A converter group 17 and converted into respective voltage signals.

This D/A converter group 17 may have a number of D/A converters corresponding to the number of control signals CV, or one D/A converter may be used in a time-sharing manner, In combination with a sample and hold circuit, the required number of control signals Cv
You may obtain.

Next, the operation of this embodiment will be explained. FIG. 2 shows the relationship between the time division processing state of a plurality of channels of the sound generation control unit 8 and the timing signals t1 to t4 supplied to the sample and hold circuits 11a to 11d. The system implements four waveform read/write channels in a time-sharing configuration, and it is possible to select whether to perform read processing or write processing for each waveform read/write channel. In the state shown in FIG. It is designed to write waveform signals, and other channels 2~
4 (ch2-4) can read digital waveform signals in a predetermined area from the waveform memory 7.

Further, the above-mentioned timing signal j+""j4 goes high at the time corresponding to each channel (chi~4).
It is designed to take the level, and D at each channel time.
The analog waveform signal output from the /A converter 10 is sampled by sample/hold circuits 11a to 11lid, and thereafter held.

FIG. 3 shows how the waveform memory 7 is divided into areas, so that, for example, N pieces of waveform information can be recorded in variable lengths. Each waveform read/write channel of the sound generation control unit 8 can independently designate an area for lead play. For example, for channels 2, 3, and 4,
Read tone 1.2.3 in Figure 3 and input it to VCF 1
2b~12d1VCA13b~13d! near processing control, analog addition circuit 14, switch 15, VCA 16
After being mixed with an external sound signal as necessary, the tone N It is recorded in the waveform memory 7 again as follows. That is, it is also possible to perform overdubbing processing.

Further, a switching signal is sent from the CPU 9 to the analog switch 15, and the waveform signal read out from the waveform memory 7 by the processing of the channel 4 is further applied to the VCA 16 via the sample/hold circuit 11d and the VCF 12d. The waveform signal obtained in this manner may be supplied to the analog adder 2, mixed with an external sound signal in the same manner as described above, and then written into a predetermined area of the waveform memory 7. .

Next, processing mainly performed by the CPU 9 in the overdubbing mode will be described in detail with reference to the flowchart shown in FIG.

The CPU 9 is activated by operating the switch on the keyboard display section 4.
When the overdubbing mode is specified, first, in step S, the keyboard/display section Judge whether or not the keyboard operation in step 4 has been performed.

In other words, in this embodiment, the frequency of the musical tone to be generated is specified by key operations on the keyboard, and the waveform signal recorded in the waveform memory 7 has a high-pitched scale specified. For example, the waveform memory 7 will output at a high readout rate, and if a bass scale is specified, the waveform memory 7 will output at a low readout rate.

If there is a key input in step S, a YES determination is made and the process moves to step S2. In step S2,
At that time, the CPU 9 stores the number of the tone to be read from the waveform memory 7 specified on the keyboard/display section 4 together with the scale specified by the key operation. The CPU 9 also stores information for determining the corresponding volume. Then, the process moves to step S3.

Even if the determination of NO is made in step S1,
The process advances to step S3. In step S3, the trigger signal for actually starting recording is sent to the keyboard/display unit 4.
This is a step to judge whether the signal has been supplied from
, →S3 or step S, →S2 →S3 are repeated to enter a standby state.

Therefore, when multiple keys are operated on the keyboard, up to three scales can be assigned to channels 2, 3, and 4, and if different tone numbers are specified, different tone waveforms can be assigned. If the signal is in the specified scale and the same tone number is specified in each channel,
Waveform signals of the same tone color are played back at different specified scales and overdubbed at different volumes.

In step S3 above, if there is trigger force, Y
A determination of es is made, and the process moves to step S4. In addition,
In step S3, when the input signal (IN) exceeds a predetermined level, a trigger force is automatically applied to the CPU 9,
The process may proceed to step S4.

In step S4, the tone number saved by the CPU 9,
The scale information is supplied to the sound generation control section 8, and the area of waveform data to be read from the waveform memory 7 is specified for each waveform read/write channel, and the scale thereof is specified.

Next, proceeding to step S5, the CPU 9 sends a digital signal for generating each control signal to the D/A converter group 17, generates a voltage control signal CV, and outputs a voltage control signal CV to each VCF.
12a ~12d1VCA13a ~13d1VCA1
6, each control signal Cv is sent out.

Further, the CPU 9 gives a switching signal to the analog switch 15, and transfers the mixed waveform signal from the adder circuit 14 to the VCA.
16. Then, the process proceeds to step S6, and the CPU 9 starts actual recording using channel 1. At this time, each of the designated channels 2 to 4 operates to generate a predetermined acoustic signal by reading waveform data from the waveform memory 7.

Then, when the input processing is completed, it becomes the end state and C
The PU 9 returns to the processing of the main routine (not shown).

As described above, in this embodiment, the four waveform read/write channels of the sound generation control unit 8 are configured to independently read and write waveform signals, and at least two channels are used to read and write waveform signals in the waveform memory. The same or separate digital signals are read out from the VCFs 12a to 1.
After controlling the tone and volume independently with the 2d1VCA 13a to 13d, the signals are mixed and written to the waveform memory 7 using a specific channel as a new sound source signal, thereby improving the overdubbing function. , and it is musically pleasing.

Also, using up to three of the four waveform read/write channels, waveform data is read from the waveform memory 7, and if necessary, this reproduced waveform data and the input waveform signal (IN) are synthesized to generate a sound source. Since it can be used as waveform data, various modes of overdubbing can be performed.

In addition, by dividing the waveform memory 7 into multiple areas and using it, it is possible to write the waveform signal obtained as a result of overdubbing to an area different from the area where the original waveform signal is recorded, and the original waveform signal It becomes possible to overdub without erasing the data.

Further, a VC is applied to each waveform signal obtained by being read out from the waveform memory 7 by a plurality of waveform read/write channels.
The volume level can be set independently using A 13 a to 13 d.

Further, the same waveform data can be read out from the same memory area at different scale frequencies using a plurality of waveform read/write channels, and then synthesized by the VCAs 13a to 13d while varying the synthesis ratio.

In the above embodiment, the timbre and volume are variably controlled using analog technology, that is, VCFs 12a to 12d and VCAs 13a to 13d, but digital technology, such as digital filters, digital multipliers, etc., is used to control the timbre and volume. Variable control of timbre, volume, envelope, etc. may be performed, in which case all processing can be performed by digital signal processing. Further, other processing may be performed on the waveform signal.

In addition to the circuit configuration of the sound generation control section 8, in addition to configuring a plurality of waveform read/write channels by time-sharing processing as in the above embodiment, separate hardware is used, that is, the same circuit configuration is used for each channel. A plurality of waveform read/write channels may be provided by using a plurality of waveform read/write channels.

Furthermore, a specific channel among multiple channels,
A write-only channel may be used to write the waveform signal into the waveform memory 7, and other channels may be used as read-only channels to read the waveform signal from the waveform memory 7. In the present invention, the term "waveform read/write channel" refers to a channel that can perform either read or write operations, or both.

[Effects of the Invention] As described above, the present invention is simple, easy to operate,
The effect is that it is possible to provide an electronic performance device that is musically preferable.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a circuit diagram thereof, FIG. 2 is a time chart for explaining its operation, and FIG. 3 is a diagram showing the self-memory state of the waveform memory. , FIG. 4 is a diagram showing a flowchart for explaining the operation of the same embodiment. 2... Analog addition circuit, 4... Keyboard display section, 6... A/D converter, 7... Waveform memory, 8...
...Sound control unit, 8...CPU, 10...D/A converter, 12a to 12d-VCF, 13a to 1
3 d-VC1 1 4...Analog adder, 7...D/A converter group.

Claims (3)

[Claims] (1) In an electronic performance device that stores an input waveform signal in a digital representation in a waveform memory means, reads out the digital waveform signal stored in the waveform memory means, converts it into an audio signal, and outputs it, the waveform to be read from the waveform memory means. a control means having a plurality of waveform read/write channels; and at least two of the control means.
A plurality of digital waveform signals representing a plurality of waveforms are read out from an area designated by the designation means of the waveform memory means by the one waveform read/write channel, and the plurality of digital waveform signals or the plurality of digital waveforms are read out. a setting means that can arbitrarily manually set the degree of change in the characteristics of the plurality of analog signals obtained by digital-to-analog conversion of the signals; A processing means for changing the characteristics of a plurality of analog signals with a degree of change manually set by the setting means, and a plurality of digital waveform signals or a plurality of analog signals obtained by changing the characteristics by the processing means. and a synthesizing means for synthesizing the synthesized waveform signal to obtain a synthesized waveform signal; 1. An electronic musical performance device, comprising: means for inputting and storing a new digital waveform signal in a corresponding area. (2) The processing means has a plurality of circuit means consisting of voltage-controlled filters and voltage-controlled amplifiers corresponding to the plurality of waveform read/write channels, so that the read digital waveform signal is analog Claim 1, characterized in that, after being converted into a signal, it is supplied to each channel to the corresponding circuit means, and after being subjected to independent timbre or volume control, it is supplied to the synthesizing means. The electronic performance device described in Section 1. (3) The processing means performs a characteristic change process by digital processing on the plurality of digital waveform signals read out by the plurality of waveform read/write channels, and the synthesis means performs a process of changing the characteristics by digital processing. 2. The electronic musical performance device according to claim 1, wherein a plurality of digital waveform signals obtained as a result of processing are digitally synthesized to generate the new digital waveform signal.