JPH0125996Y2 - - 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 the case of electronic musical instruments, a sound source signal corresponding to the performance operation of the keyboard section is generated, and this sound source signal is appropriately shaped into a musical tone signal, and furthermore, effects such as various modulations are added as necessary. It generates performance sounds. The timbre, effects, etc. of this performance sound are set by selecting and operating the controls set on the operation panel of the electronic musical instrument.If you do not operate the controls, the tone, effect, etc. Effects etc. cannot be changed. Therefore, the timbre, effects, etc. of the performance sound are usually set before the performance begins, and these performance sound conditions are not often changed during the performance. In addition, when changing the performance sound state, multiple memory circuits each specifying a different performance sound state are set up, and one of them is selected and specified by operating a selection switch. The selection switch must be operated at the same time. Therefore, complex changes in performance sound conditions cannot be performed during performance.

This idea was developed in consideration of the above points, and it is an electronic musical instrument that can change the designation of a plurality of different performance sound states in a predetermined order to produce a unique onomatopoeic effect that cannot be obtained with a normal musical instrument. This is what we are trying to provide.

That is, the electronic musical instrument according to this invention automatically specifies conversion of condition signals that set different performance sound states even during performance.
This allows performance effects to be obtained in a very random manner.

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, when a key is pressed, a pitch signal of a voltage value corresponding to the pitch of the operated key is generated, and a pitch signal corresponding to a key press (key-on) and a key release (key-off) is generated. Generates a keying signal. The pitch signal from this keyboard circuit 11 is transmitted to a voltage-controlled variable frequency oscillator 12 (hereinafter referred to as
(abbreviated as VCO), and drives and controls this VCO 12 so as to obtain an oscillation signal corresponding to the pitch of the operated key. That is, a sound source signal corresponding to a key operation is obtained from the VCO 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 VCA). ) to set its signal amplitude envelope. The output musical tone signal from this VCA 14 is then sent to an amplifier 15.
The amplified sound is suitably amplified and supplied to the speaker 16, and the speaker 16 generates performance sound.

For each of the VCO12, VCF13, and VCA14, envelope generation circuits 17 and 1 are provided.
The envelope waveform signals from 8 and 19 are supplied as control signals. This envelope generation circuit 17
to 19, the keying signal from the keyboard circuit 11 is coupled to generate an envelope waveform signal whose voltage value changes over time, rising and sustaining when a key is pressed, and attenuating from when a key is released.
In the VCO 12, the sound source signal frequency is slightly modulated by this envelope waveform signal, and a pitch modulation effect is added.
Further, in the VCF 13, the cutoff frequency is changed based on the combined envelope waveform signal to modulate the timbre, and in the VCA 14, the amplification gain is changed based on the combined envelope waveform signal, The amplitude envelope of the output musical tone signal is now set.

That is, the state of the timbre, effect, etc. of the performance sound obtained from the speaker 16 is determined by the envelope generation circuit 1.
This is determined by the envelope waveform signals from 7 to 19, and by changing the state of the envelope waveform signals, the state of the performance sound can be variably set.

Here, the shapes of the envelope waveform signals generated from the envelope generation circuits 17 to 19 are, for example, the attack level at the rise from key-on, the attack time, the sustain level during sustain, and the 1st day scale which is the attenuation characteristic from the attack level to the sustain level. This is the attenuation characteristic from key-off to initial level.
It is determined by various conditions such as 2nd Decay time and basic initial level.

That is, a predetermined performance sound state is set by coupling the condition signals for waveform formation as described above to the envelope generating circuits 17 to 19.
The condition signals for 19 to 19 are stored and held in the sample and hold circuits 20, 21, and 22, respectively, and the stored signals are read and supplied to the envelope generation circuits 17 to 19, respectively. It is.

The condition signals to be coupled to each of the sample and hold circuits 20 to 22 are connected to a plurality of memory setting circuits 2
5a, 25b, . . . , and condition signals for setting different performance sound states are set for each of the memory setting circuits 25a, 25b, . In this case, the memory setting circuits 25a, 25b, . . . are each composed of independent circuit devices, and if they are composed of circuit devices that can be attached and detached as appropriate, it will be effective for selecting the type of performance sound state to be set. be.

Then, each memory setting circuit 25a, 25b,
The storage condition signals of... are each stored in the gate circuit 26.
The output condition signals from the gate circuits 26a, 26b, . . . are read out via the sample and hold circuits 20 to 22.
distributed and supplied to Here, a gate signal is given to one of the gate circuits 26a, 26b, . The oscillation clock signal from this oscillator 28 is further transmitted to the sample and hold circuits 20 to 22.
It is also supplied as a sample hold signal.

That is, in the electronic musical instrument configured as described above, a pitch signal and a keying signal are generated from the keyboard circuit 11 in response to key operations. At this time, the condition signals sampled by the sample and hold circuits 20 to 22 are supplied to the envelope generation circuits 17 to 19, so that the performance sound set by the envelope waveform signal corresponding to the condition signal is obtained. It is what it is.
That is, in response to the count increment of the ring counter 27, the storage condition signals of the storage setting circuits 25a, 25b, . . . are sequentially selectively read out by the gate circuits 26a, 26b, .
2. and,
These sample and hold circuits 20 to 22 are connected to the oscillator 2.
The sample conversion operation is performed by the oscillation clock signal from the oscillator 8, and therefore the state of the performance sound obtained by the VCO 12, VCF 13, and VCA 14 in response to key operations is determined by the oscillator 28.
The state will be such that switching conversion is automatically controlled.

That is, the speaker 16 generates a performance sound with a pitch corresponding to the key operation, and the state of the performance sound is automatically converted in accordance with the oscillation clock signal from the oscillator 28. Because it is a musical instrument, the state changes as the performance progresses, and it is possible to obtain performance sounds 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 on the keyboard section is operated to obtain one note. However, if multiple series of circuits as described above are provided and multiple keys are operated on the keyboard section at the same time, each operation will be performed. By distributing pitch and keying signals from keys to the plurality of circuits described above using a key assigner circuit, it is possible to construct an electronic musical instrument that can also play ordinary chords.

Further, in the embodiment, gate circuits 26a, 26b,
... was used, but as shown by the broken line in the figure, the count value signal of the ring counter 27 is stored in the memory setting circuits 25a and 2.
5b,... as a read command signal, the gate circuits 26a, 26b,...
can be omitted as appropriate.

As described above, according to this invention, the state of the performance sound is automatically switched and controlled at a specific cycle set by the oscillator, and although it is a performance state in which keys are operated normally, it is different from conventional electronic It is possible to express onomatopoeic performance effects that cannot be achieved with musical instruments at all.

[Brief explanation of the drawing]

The accompanying drawing is a configuration diagram illustrating an electronic musical instrument according to an embodiment of this 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 to 22 ... Sample hold circuit, 25a, 25b ... Memory setting circuit (condition signal), 26a, 26b ... Gate circuit, 27 ... Ring counter, 28 ... Oscillator.

Claims (1)

[Claims for Utility Model Registration] Storage means for storing a plurality of sets of condition signals for setting different performance sound states; selection means for selecting one set of the plurality of sets of condition signals; a control signal generating means for generating a control signal; and a switching control means for sequentially changing the selection target of the selection means each time the control signal generated by the control signal generating means is generated, An electronic musical instrument configured to change the state sequentially at each of the predetermined cycles during performance.