JPS584143Y2 - electronic musical instruments - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electronic musical instrument that, when played in ensemble with other musical instruments, adds a modulation effect or the like to the performance sound depending on the performance state of the other musical instruments.

In an electronic musical instrument, a sound source signal is generated in response to a performance operation, and a filter circuit shapes the tone of this sound source signal into a musical sound signal, which is then used to generate performance sound from a speaker.

In this case, various modulations such as frequency, amplitude, phase, etc. are applied to the musical tone signal as appropriate in order to increase the expressiveness of the performance sound.

However, such timbre formation, modulation control, etc. are performed according to conditions set inside the electronic musical instrument.
The state of the performance sound is also specified in accordance with the setting state.

Although electronic musical instruments configured in this way are often played alone, they are also often played in ensemble with other rhythm instruments, guitars, and other instruments, and are also used as accompaniment for vocals. It is also used for etc.

When an ensemble performance is performed in this way, the performance sound of the electronic musical instrument is not only changed according to the set state, but also changes depending on the state of the other instruments, vocals, etc. being played in the ensemble, so that the performance sound can be expressed more effectively. It is hoped that the power will be demonstrated.

For this purpose, it is conceivable to detect external sounds such as the sounds of other musical instruments or vocals, and supply this detection signal to a timbre shaping filter, but this is still insufficient to detect the sounds of electronic musical instruments. cannot bring about any change.

This idea was developed in view of the above points, and aims to provide an electronic musical instrument that can further vary the performance sound depending on external sounds, thereby making it possible to perform ensemble performances more effectively. In addition to providing an external sound detection means, this detection signal is used to form a timbre as a performance sound, and the performance sound is modulated and controlled by the detected output of the detection signal.

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

The attached drawing shows the configuration, and the 11th part of the keyboard is as follows:
As a key is operated, a pitch signal having a voltage value corresponding to the pitch of the operated key, and a keying signal related to key depression (key-on) and key release (key-off) are generated.

The pitch signal from the keyboard 11 is supplied to a VCO 12 (voltage controlled variable frequency oscillator), which is controlled to oscillate a sound source signal of a frequency corresponding to the pitch of the operated key.

The sound source signal generated by this VCO 12 is transmitted to the VCF 13 (
A tone color is formed into a musical tone signal using a voltage-controlled variable filter (voltage-controlled variable filter), and the amplitude envelope is controlled and extracted using a VCA (voltage-controlled variable gain amplifier).

The output musical tone signal from the VCA 14 is further subjected to amplitude modulation, for example, by a modulator 15, and then appropriately amplified by an amplifier 16 and coupled to a speaker 17, so as to be produced as a performance sound.

Kamigami VCO12, VCF13. Envelope waveform signals from envelope generation circuits 18 and 19.20 are coupled to each of the VCAs 14 as control signals.

The envelope generating circuits 18 to 20 include the keyboard 1
This is a signal in which the keying signals from 1 are combined.For example, it generates an envelope waveform signal corresponding to a key operation that rises when a key is pressed and decays when a key is released.The shape conditions of this waveform, that is, the rise time constant, the rise Conditions such as level, duration level, decay time constant, etc. are given from the control circuit 21.

Then, the VCO 12 changes the sound source signal frequency in response to the combined envelope waveform signal to obtain a sound source signal rich in naturalness, and the VCF 13 changes the tone color in response to the envelope waveform.

The VCA 14 sets the amplitude envelope to produce a tone signal with rich musicality.

Further, this electronic musical instrument is provided with an external sound detection device 22 such as a microphone.

The external sound signal detected by this detection device 22 is
The external sound signal is supplied to the VCF 13 together with the sound source signal from the external sound signal 2, and is also supplied to the detection circuit 23 to detect the amplitude envelope of the external sound signal.

The output signal from this detection circuit 23 is transmitted to the selection switch 24.
This switch 24 is led to one fixed terminal.
The selected output signal is supplied to the modulation circuit 15 as a modulation signal.

Here, different waveform signals from a waveform conversion circuit 26 that converts the oscillation signal of one oscillator 25 into a plurality of different waveforms are coupled to the other fixed terminals of the selection switch 24.

Specifically, the selection switch 24 is provided with five fixed terminals.

The output signals of the detection circuit 23 are coupled to one of them.

Then, the sine wave, rectangular wave, sawtooth wave, and triangular wave signals generated by the waveform conversion circuit 26 are coupled to each of the other four fixed terminals.

That is, in the electronic musical instrument configured as described above, in response to a key operation on the keyboard 11, a sound source signal corresponding to the pitch of the operated key is generated from the VCO12, and the sound source signal is generated from the VCO13.
(2) A musical tone is formed in CAl4 in response to an envelope waveform signal corresponding to a key operation.

At this time, for example, when a guitar is played in concert with this electronic musical instrument performance, the sound of the guitar performance is detected as an external sound by the external sound detection device 22, and the detection signal is the sound source signal from the VCO 12. VC in a state where it is synthesized with
It is coupled to F13.

In other words, the VCA 14 provides a musical sound signal in which the guitar sound is synthesized with the original electronic musical instrument's musical sound, and the guitar sound is also transferred to the VCF along with the original electronic musical instrument's musical sound.
The timbre is formed in 13, and the envelope is set in VCA 14, so that it is expressed as a new sound.

therefore. The musical tone signal obtained from this VCA 14 is
A state is reached in which a new musical tone different from the original electronic musical instrument tone is expressed, and is supplied to the modulator 15.

In this case, the detection signal from the external sound detection device 22 is also applied to the detection circuit 23 at the same time, and the detection circuit 23 outputs a detection output signal corresponding to the volume envelope of the external sound, that is, the guitar performance sound. is obtained.

If the selection switch 24 is set to select the detection output, the detection output signal from the detection circuit 23 is given to the modulator 15 as a modulation signal.

The output musical tone signal from the VCA 14 is amplitude-modulated in accordance with the guitar sound envelope, and the speaker 17 is driven in response to the modulated output musical tone signal from the modulator 15, so that a performance sound can be obtained.

In other words, when an ensemble is played with an electronic instrument and other instruments, the musical sound of the electronic instrument is changed and modulated in response to the sound of the other instruments, which is different from conventional electronic instruments. This allows for new performance expressions that could not be achieved with musical instruments.

Here, if the selection switch 24 is used to select one of the output signals from the waveform conversion circuit 26.

As described above, the VCA 14 obtains a musical tone signal in which external sounds are synthesized, but the modulator 15 performs modulation control regardless of the external sounds. In the above explanation, the guitar performance sound is used as the external sound. , but this may be any other musical instrument sound or even vocals.

Furthermore, in the case of a performance venue, etc., the sound of the venue's claps, etc. may be used.

Furthermore, the modulator 15 is not limited to AM as described above, and good effects can be achieved even when using FM, PM, timbre modulation, or the like.

As described above, according to this invention, the sound source signal from the oscillator generated in response to the key operation is synthesized with the ensemble performance sounds of various musical instruments, vocals, etc. that are played at the same time. It expresses a special performance sound that cannot be found in musical instruments, and at the same time, the performance sound is modulated by the volume envelope of the external performance and an effect is added to it.

Therefore, the sound of this electronic musical instrument. The ensemble sound in the concert hall is specially controlled in terms of the composition and effect of the performance sound, and it enables performance expressions that could not be seen in the past to be effectively matched to the atmosphere of the concert venue, ensemble effects, etc. This is something that can be achieved.

[Brief explanation of drawings]

The accompanying drawing is a configuration diagram illustrating an electronic musical instrument according to an embodiment of this invention. 11...keyboard, 12...VCO (voltage controlled variable frequency oscillator), 13...VCF (
voltage-controlled variable filter), 14...VCA (
voltage controlled variable gain amplifier), 15...Modulator, 18-20...Envelope generation circuit, 22
...External sound detection device, 23...Detection circuit, 24...Selection switch, 25...
Oscillator, 26...Waveform conversion circuit.

Claims (1)

[Scope of utility model registration request] a variable filter circuit for forming a tone color of a sound source signal corresponding to a performance operation; a means for detecting an external sound; a means for supplying the external sound signal detected by the means to the variable filter circuit; An electronic musical instrument comprising: a modulation circuit that modulates a musical tone signal generated by the external sound detection signal; and means for modulating and driving the modulating circuit using a detected output of the external sound detection signal, and extracting an output musical tone signal from the modulation circuit.