JPS58227Y2 - electronic musical instruments - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electronic musical instrument that can express onomatopoeic performance effects that cannot be obtained with natural musical instruments.

In electronic musical instruments, a sound source signal is generated in response to the performance operation of the keyboard section, and this sound source signal is appropriately shaped into a musical sound signal, and furthermore, effects such as various modulations are added as necessary. It generates performance sounds.

These performance tones, effects, etc. are set by selecting and operating a large number of controls set on the operation panel of the electronic musical instrument. etc. cannot be changed.

Therefore, the performance is usually started by setting the tone color, effects, etc. of the performer before the performance, and these performance sound conditions are not often changed during the performance.

In addition, when changing the performance sound state, a plurality of memory circuits each specifying a different performance sound state are set, and one of them is selected and specified by operating a selection switch.
In addition to the performance operation, a special selection switch operation must be performed, and complex changes in performance sound conditions cannot be performed during the performance.

This idea was created in view of the above points, and provides an electronic musical instrument that randomly changes the designation of a plurality of different performance sound states to produce a unique onomatopoeic effect that cannot be obtained with ordinary musical instruments. The purpose of this system is to allow a plurality of memory setting circuits, each of which stores condition signals for setting different performance sound states, to automatically specify conversion during a performance.

An embodiment of this invention will be described below with reference to the drawings.

The attached drawing shows its configuration. In the keyboard circuit 11, the keyboard circuit 11 receives a pitch signal of a voltage value corresponding to the pitch of the operated key as the key is pressed, and a pitch signal of a voltage value corresponding to the pressed key (key-on) and key released (key-off). Generates a keying signal.

The pitch signal from this keyboard circuit 11 is supplied to a voltage-controlled variable frequency oscillator 12 (hereinafter abbreviated as VCO), and this VCO 12 is drive-controlled so as to obtain an oscillation signal of a frequency corresponding to the pitch of the operated key. do.

In other words, a sound source signal corresponding to the key operation is obtained from the CO 12, and this sound source signal is formed into a tone by a voltage-controlled variable filter 13 (hereinafter referred to as VCF), and is also processed by a voltage-controlled variable gain amplifier 14 (hereinafter referred to as VCF). (abbreviated as VCA) sets the signal amplitude envelope.

The output musical instrument signal from the VCA 14 is appropriately amplified by an amplifier 15 and supplied to a speaker 16, and the speaker 16 generates performance sound.

Envelope waveform signals from envelope generation circuits 17, 18, and 19 are supplied as control signals to the VCO 12, VCF 13, and VCA 14, respectively.

The envelope generating circuits 17 to 19 include a keyboard circuit 1
The keying signals from 1 are combined to generate an envelope signal whose voltage value changes over time, rising and sustaining from the time the key is pressed, and decaying from the time the key is released.
In No. 12, the sound source signal frequency is minutely modulated by the envelope signal, and a pitch modulation effect is added.

Further, in the VCF 13, the cutoff frequency is changed based on the envelope signal to which it is combined, and the tone is modulated.
In this case, the amplification gain is changed by the combined envelope signal, and the amplitude envelope of the output musical tone signal is set.

That is, the timbre, effects, etc. of the performance sound obtained from the speaker 16 are determined by the envelope waveform signals from the envelope generation circuits 17 to 19.
By changing the state of this envelope waveform signal, the performance sound state is variably set.

Here, the shape of the envelope waveform signal generated by the envelope generation circuits 17 to 19 includes, for example, the attack level at the rise from key-on, the attack time, the sustain line level during sustain, and the attenuation characteristics from the attack level to the sustain level. It is determined by various conditions such as the 1st decay time which is the decay characteristic from key-off to the initial level, the 2nd decay time which is the decay characteristic from key-off to the initial level, and the basic initial level.

That is, a predetermined performance sound state is set by coupling the above-mentioned various waveform forming condition signals to the envelope generating circuits 17 to 19, and each envelope generating circuit 17 to 19 Condition signals for are stored and held in sample and hold circuits 20, 21, and 22, respectively, and are read and supplied to envelope generating circuits 17-19.

Here, the sample and hold circuits 20 to 22 are controlled for writing and reading by a one-shot pulse from a one-shot circuit 24 that is driven by the differential output of a differentiating circuit 23 that detects the key-on state of the keying signal. When the key is turned on, the combined condition signal is written and held, and the held condition signal is supplied to the envelope generation circuits 17-19.

Condition signals to be coupled to the sample and hold circuits 20 to 22 are sent to a plurality of memory setting circuits 25 a , 25 b . . .
. . . The storage setting circuits 25 a , 25 b . . . store condition signals for setting different performance sound states.

In this case, the memory setting circuits 25a, 25b...
It is effective to select the type of performance sound state to be set by constructing each of the circuit devices as independent circuit devices, which can be attached and detached as appropriate.

And, each memory setting circuit 25a, 25b...
The storage condition signals of... are respectively sent to the gate circuit 26.
a, 26b, etc., and the gate circuits 26a, 26b,...
The output condition signal from ... is the sample hold circuit 2.
0 to 22 are distributed and supplied.

Here, the gate circuits 26a, 26b...
A gate signal is given to one of the ring counters 27 in accordance with the count value of the ring counter 27, and the ring counter 27 is incremented by one step each time the key is operated by the output signal of the differentiating circuit 23.

That is, in the electronic musical instrument configured as described above, a pitch signal is generated from the keyboard circuit 11 in response to a key operation, and a keying signal is also generated, and the sample hold circuits 20 to 22 at that time generate a pitch signal and a keying signal. A performance sound set by the envelope waveform signal generated from the envelope generation circuits 17 to 19 in response to the sampled condition signal can be obtained.

In this case, the ring counter 27 is incremented by the differential signal from the differentiating circuit 23 that is generated every time the key is operated, and the memory setting circuits 25a, 25b, . . . The storage condition signal of . . . is the gate circuit 26a.

26b... are sequentially selectively read out and supplied to sample and hold circuits 20-22.

The sample and hold circuits 20 to 22 perform a sample conversion operation on the output of the differentiating circuit 23 every time a key is operated, and therefore the VCO 12 and VC are
The states of the performance sounds obtained by F13 and VCA14 are switched.

In other words, the performance sound of the pitch corresponding to the key operation is output from speaker 1.
6, the state of the performance sound changes with each key operation, making it possible to obtain a performance sound with an onomatopoeic effect that cannot be obtained with conventional electronic musical instruments.

In the above embodiment, a case has been described in which one key is operated on the keyboard section to obtain a single note performance sound, but if multiple series of circuits as described above are provided and multiple keys are operated on the keyboard section at the same time, By distributing pitch keying signals from each operating key to the plurality of circuits using a key assigner circuit, it is possible to construct a multitone electronic musical instrument that can also play normal chords.

Furthermore, in the embodiment, the performance tone state force is changed by the count value of a ring counter driven in response to key operations, so that the change is made in synchronization with the key operations.

However, if an independently constituted oscillator is provided, and the ring counter 27 is counted by the oscillation signal from this oscillator, and the sample and hold circuits 20 to 22 are controlled, the state of the performance sound can be automatically adjusted at a specific cycle. The conversion will be switched to .

Furthermore, in the embodiment, the gate circuits 26 a , 26 b .
..., but as shown by the broken line in the figure, the count value signal of the ring counter 27 is transferred to the memory setting circuit 25a,
If it is supplied as a read command signal to 25b..., the gate circuits 26a, 26
b... can be omitted as appropriate.

As described above, according to this invention, the state of the performance sound is switched between multiple states during the performance, and it is possible to express onomatopoeic performance effects that cannot be achieved at all with conventional electronic musical instruments. It is something that becomes.

[Brief explanation of drawings]

The accompanying drawing is a configuration diagram illustrating an electronic musical instrument according to an embodiment of the invention. 11...keyboard circuit, 12...voltage controlled variable frequency oscillator, 13...voltage controlled variable filter, 14...voltage controlled variable gain amplifier , 17-19...Envelope generation circuit, 20
~22...Sample hold circuit, 24...
...One-shot circuit, 25 a, 25 b...
...Memory setting circuit (condition signal), 26 a, 26
b...Gate circuit, 27...Ring counter.

Claims (1)

[Scope of utility model registration request] A plurality of memory setting circuits each storing condition signals for setting different performance sound states, a selection means for selecting one of the plurality of memory setting circuits, and a selection target of the selection means being sequentially switched and changed. What is claimed is: 1. An electronic musical instrument comprising a switching control means for sequentially switching between a plurality of performance sound states during a performance.