JPS6232313Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a performance sound storage device for an electronic musical instrument commonly called a synthesizer or the like.

When an electronic musical instrument called a synthesizer receives a voltage signal corresponding to a note name, it oscillates a signal with a frequency corresponding to that note name, and shapes the waveform of the oscillation signal to match the waveform of various instruments, for example. By setting the rise time, fall time, level, etc. of the sound, it is possible to generate sounds as if they were a wind instrument, percussion instrument, string instrument, etc., for example. For example, as shown in FIG. 1, by increasing the volume as shown by a curve 111 that rises exponentially, a violin-like sound can be produced. Furthermore, if the curve falls exponentially like the curve 112, a piano sound can be produced. To make the sound resemble an organ, the volume can be kept constant from the rise to the fall, as shown by curve 113. These settings are set by multiple potentiometers.
The actual number of potentiometers is about 32, for example, and the knobs are arranged on the control panel. It would be impractical to set this number of potentiometers each time a performance is performed to generate the desired sound of the instrument, as it would take time to set them. Particularly when performing on stage or the like, it would be practically impossible to change the settings every time the song changes. For this reason, it is conceivable to prepare a plurality of synthesizers that are set to produce the necessary sounds, and to use them by replacing them for each song. However, the necessity of preparing a plurality of synthesizers imposes a heavy economic burden. It is also troublesome to carry. For this reason, a device has been proposed in which the settings of each potentiometer are stored in a memory so that the sounds of various musical instruments can be reproduced with a single push button operation. In this way, you can arbitrarily change the setting state and change the sound of the instrument even during the performance. However, if various setting states are stored in a memory and each setting state is reproduced by reading the memory, the timbre etc. are fixed to that state, resulting in a loss of freedom.

For this reason, a performance sound storage device as shown in FIG. 2 has been proposed. In FIG. 2, 211 indicates a keyboard. Although not particularly shown, the keyboard 211 is provided with a voltage divider circuit such as a resistor ladder circuit, for example.
A voltage signal corresponding to the note name assigned to the keyboard is extracted from each voltage dividing point of this voltage voltage dividing circuit by the keyboard operation, and this voltage signal is transmitted to the voltage controlled oscillator 21.
2, and an electrical signal of a frequency corresponding to the manipulated note name is obtained from the oscillator 212. This electrical signal is supplied to a signal shaping circuit 213, and in this signal shaping circuit 213, the rise time of its envelope is
The fall time, waveform, etc. are shaped into desired ones, and the shaping results in the sound of the desired musical instrument, which is applied to the amplifier 214, and the sound of the musical instrument is output from the speaker 215.

The signal shaping circuit 213 is controlled by the output voltage of the performance sound storage device 216 and shapes the output signal of the oscillator 212 into various musical instrument signals. The performance sound storage device 216 includes a multiplexer 217, an A/D conversion means 218, a memory 219, an address setting means 221 for providing a read address and a write address to the memory 219, and a D output for the read output of the memory 219.
- A D-A conversion means 222 for performing A conversion, and a multiplexer 22 for distributing the D-A conversion output of the D-A conversion means 222 to various control signals that determine performance sounds.
3, and a sample-and-hold circuit 224 that samples and holds each control signal distributed by the multiplexer 223 and outputs the sample-and-hold signal.

The output of the performance sound storage means 216 is output from the switch 225.
For example, the voltage controlled filters 226, 22 of the signal shaping circuit 213
7, a variable gain amplifier 228, etc., and the performance sound is set.

The switches 225a, 225b, . Switches 225a-225n
A potentiometer group 229 is connected to the contact a side of the potentiometer group 229, and each potentiometer 229a, 229b, . . . 229n of the potentiometer group 229 outputs a performance sound setting voltage. In other words, after determining the performance sound using the potentiometer group 229, the memory 2
By operating a write command button 231 provided at 19, the set voltage set in the potentiometer group 229 is stored in the memory 219 via the A/D converting means 218. For example, the memory 219 has 12
When one of the push buttons constituting the address setter 221 is operated, one write area is determined by the push button, and each set voltage of the potentiometer group 229 is applied to that write area. Each time the multiplexer 217 switches, the signal is converted from analog to digital and stored. Although not particularly shown, the multiplexers 217 and 223 are switched and controlled at high speed in synchronization with each other by a controller. Therefore, by momentarily turning on the write command button 231, writing to the memory 219 is executed, and when the on operation is turned back, the memory 219 is placed in a reading state.

In the read state, data is read from the area specified by the address setter 221, and the read output is distributed by the multiplexer 223 to channels corresponding to each data, and sampled and held for each channel. By returning the switches 225a to 225n to the contact b side, the sample hold circuit 2
24 is supplied to the signal shaping circuit 213, and the performance sound set by the potentiometer group 229 is output. The switches 225a to 225n are controlled by, for example, pulling or pushing the operating knobs of each potentiometer 229a to 229n, and by pulling the knob, the switch is switched to the contact a side, and by pushing it, it is returned to the normal position and switched to the contact b side. .

Therefore, conventionally, when writing performance sound data into the memory 219, it was necessary to pull out all the knobs of the potentiometers 229a-229n of the potentiometer group 229 and change the switches 225a-225n, which was troublesome. To modify a part of the data after storing performance data in the memory 219, pull out the knob of the potentiometer corresponding to the data you wish to modify, and, for example, switch the switch 225a to the contact a side to change the data system to the potentiometer. The meter 229a must be returned to its current value. Also, conventionally switches 225a to 225
Since the output of the potentiometer group 229 and the output of the storage device 216 are switched using n, the potentiometers 229a to 229n must be equipped with switches.
A potentiometer with a switch is expensive, and since there are many of them, there is also the drawback that the cost is high.

This invention attempts to provide a performance sound storage device that does not use a potentiometer with a switch, and does not require a special switching operation between a group of potentiometers and a storage device.

FIG. 3 shows an embodiment of this invention. In this invention, a microprocessor is used, and the control and arithmetic functions of the microprocessor are utilized, and the changeover switches 225a to 225n are omitted. In FIG. 3, parts corresponding to those in FIG. 2 are denoted by the same reference numerals, and redundant explanation thereof will be omitted. However, the voltage signal output from the keyboard 211 causes the voltage controlled oscillator 212 to generate a frequency corresponding to the note name of each keyboard. A signal is oscillated, and the frequency signal is sent to the signal shaping circuit 213.
This is exactly the same as in the case of FIG. 2 in that it is shaped into various musical instrument sounds, amplified by an amplifier 214, and emitted from a speaker 215.

The performance sound storage device 311 according to this invention utilizes a microprocessor consisting of a central processing unit 312, a ROM 313 that operates the central processing unit 312 in a predetermined order, and a RAM 214 that stores input data. . A mode changeover switch 316 is connected to the bus line 315 of the microprocessor, and the mode changeover switch 316 switches between a setting state, a write state, and a read state. In the setting state, potentiometer group 2
The voltages set at the 29 potentiometers 229a to 229n are sequentially taken out by the multiplexer 217 and sequentially supplied to the A/D converting means 218. In the A-D conversion means 218, each potentiometer 229 supplied from the multiplexer 217
The set voltages of a to 229n are converted from analog to digital. The A-D converted digital data is transferred to the D-A converting means 317 through the central processing unit 312, where it is D-A converted and sampled and held by the multiplexer 318 in the sample and hold circuit 319 for each data. A signal shaping circuit 213 is controlled. Therefore, in the setting state, the states of the potentiometers 229a to 229n are directly applied to the signal shaping circuit 213. Therefore, while listening to the sound emitted from the speaker 215, the potentiometers 229a to 229n are adjusted so that the sound becomes the sound of the desired musical instrument.

When the sound emitted from the speaker 215 becomes the sound of the desired instrument, the write command button on the mode switching means 316 is pressed. At the same time, the setting button of the address setting device 221 is used to specify in which area of the RAM 314 the performance sound data of the musical instrument is to be stored. For example, if the No. 1 button of the address setter 221 is pressed, the setting voltage data of the potentiometers 229a to 229n is written in the area of the RAM 314 specified by the No. 1 button. Address setter 221
For example, the number of push buttons is 12 to 16, so 12
~Can memorize the sounds of 16 different instruments.

Each performance sound data stored in the RAM 314 can be read out by operating a read button of the mode switching means 316. Address setter 221 No.
When the No. 1 button is pressed to set the read mode, the data stored in the No. 1 area is read out, and the signal shaping circuit 213 is controlled by the data. Therefore, if that data defines the sound of the piano,
When the keyboard 211 is operated, a piano sound is output from the speaker 215.

Therefore, in this invention, when a part of the data stored in the RAM 314 is first corrected, when the potentiometer corresponding to the data to be corrected is operated, the operation is detected and the operated potentiometer is Regarding the meter, RAM3 is stored in the difference between the current value of the potentiometer and the initial value before operation.
14 and outputs a value obtained by adding the values stored in 14.

In other words, while the signal shaping circuit 213 is being controlled by the memory value stored in the RAM 314, the central processing unit 312 controls each potentiometer 229a.
-229n output voltages are taken in and each value is stored as an initial value in the initial value storage area of the RAM 314. This initial value and each potentiometer 229a~
229n is compared, and when the comparison result is no longer zero, it is determined that the potentiometer has been operated. When it is detected that a potentiometer has been operated, a value obtained by adding the difference (P-I) between the current value P and the initial value I of that potentiometer to the value M stored in the RAM 314 is output for that potentiometer. let If the output is V ₀ , then V ₀ = M + (PI) Therefore, for example, as shown in Figure 4, the stored value M is M
=2, the current value P of the potentiometer is P=6, and the initial value I is I=4, then V ₀ =4. These operations are executed in the central processing unit 312 according to a program stored in the ROM 313.

By configuring it to output the calculation result of V ₀ = M + (P - I) in this way, even if the potentiometer is operated greatly at the beginning of the operation, the change in the performance sound will be small compared to the amount of operation. can do. Therefore, fine adjustment can be made when setting the performance sound, and the operation for setting the performance sound becomes easy.

By adjusting the potentiometer and operating the write command button of the mode switching means 316 when the sound output from the speaker 215 is corrected to the desired musical instrument sound, the calculation result of V ₀ =M + (P-I) is obtained. is RAM3
14 is written in the write area corresponding to that potentiometer. If the current value P of the potentiometer reaches the lower limit of 0 or the upper limit of 10, then
It is assumed that V ₀ =P is output.

In the above example, V ₀ =M+(P-I) is output, but as another example, it is also possible to output V ₀ =M+K(P-I). Here, K is a positive coefficient of 1 or less.

In this way, by multiplying (P-I) by a positive coefficient K of 1 or less, it is possible to further finely adjust the change in the performance sound with respect to the operation amount of the potentiometer. Therefore, by doing this, it is possible to more easily set the performance tones.

Furthermore, in the above description, the current value P of the potentiometer is output when the current value P of the potentiometer reaches the upper or lower limit of its setting range, but as another example, the current value P of the potentiometer may be output.
When the value matches the stored value M, the current value P of the potentiometer may be output from that point on.

As explained above, according to this invention, when the potentiometer corresponding to the data to be corrected is operated, the operated potentiometer will have the value M stored in the RAM 314 and the current value P of that potentiometer. A value obtained by adding the difference between I and the initial value I is automatically output, and the performance sound can be corrected by fine adjustment. Therefore, the amount of change in the output voltage of the potentiometer can be added to the stored value M and outputted without operating a switch, so the operations required for correction are simplified, and an easy-to-operate synthesizer can be provided. Furthermore, since there is no need to use a potentiometer with a switch, an inexpensive potentiometer can be used, and overall cost reduction can be expected.

Incidentally, in the above example, the A-D converting means 218 and the D-A converting means 317 are provided separately, but the fifth
As shown in the figure, an analog comparator 511 and a D-A converter 317 may constitute an A-D converter.

[Brief explanation of the drawing]

Figure 1 is a waveform diagram to explain the rise and fall times of sounds of various musical instruments, Figure 2 is a system diagram to explain a conventional performance sound storage device, and Figure 3 is a diagram of this invention. FIG. 4 is a front view for explaining the operation of the main parts of this invention, and FIG. 5 is a system diagram showing another embodiment of this invention. 211: keyboard, 212: means for outputting a signal with a frequency corresponding to the note name, 213: signal shaping circuit,
218: A-D conversion means, 229: potentiometer group, 311: performance sound storage device, 312: central processing unit, 314: storage means, 317: D-A conversion means, 318: multiplexer constituting output means, 319: Sample and hold circuit constituting output means.

Claims (1)

[Claims for Utility Model Registration] A means for obtaining an electrical signal with a frequency corresponding to a pitch name, a signal shaping circuit for shaping the envelope, waveform, etc. of the electrical signal obtained by this means, and control for this signal shaping circuit. A group of potentiometers that output voltage; A-D conversion means that converts the output voltage of the group of potentiometers; a mode changeover switch that switches between a read state, a setting state, and a write state; - storage means for storing the digital output of the D conversion means in the write state of the mode changeover switch, and storing a plurality of digital outputs for at least one potentiometer; an output means for reading data in the read state of the mode changeover switch and converting it into an analog signal as the control voltage; and outputting the digital value stored in the storage means to the output means; means for detecting that each potentiometer in the group has been operated; and a means for detecting that each potentiometer in the group has been operated; comprising a calculation means for adding to the stored value being read at that time, and a central processing unit for controlling the calculation result of the calculation means to be directly output to the output means in place of the signal from the storage means. Performance sound storage device for electronic musical instruments.