JPS5943597Y2 - electronic musical instruments - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electronic musical instrument that controls the highest note of simultaneously played notes in response to key touches, thereby enabling effective concerto-like performances.

Conventionally, commonly used electronic musical instruments include a sound source circuit that generates a sound source signal corresponding to each pitch, and a key that is driven to open and close in response to key operations using the sound source signal from this sound source circuit. The selection is made via a switch circuit, the tone is appropriately formed, and the sound is generated.

In other words, in such an electronic musical instrument, the keyboard section has only the function of selecting and deriving sound source signals corresponding to the operated keys, and the player's volume etc. are controlled by otherexchange mechanisms. Unlike a piano, etc., it cannot be controlled by touching the keys.

For this reason, the timbre waveform and the like are repeated in the same way over time, resulting in a flat performance sound, making it difficult to achieve the desired expressiveness.

As a means to improve these drawbacks, we have developed a so-called touch response system that detects the elemental touch on the keyboard, that is, the touch speed, pressing force, etc., and variably controls the pitch, timbre, volume, etc. using this detection signal. is considered.

In this case 1, for example, if an electronic musical instrument has a two-tiered keyboard consisting of an upper keyboard and a lower keyboard, the upper keyboard will be configured with touch response, but during actual performance, for example, the entire upper keyboard will be configured with touch response. do not have to.

For example, when performing a concerto, even when multiple keys are operated at the same time, the parts other than the solo part will be in charge of the accompaniment, and at the same time, the movements will be relatively quiet and gentle, and only the solo part will be the main part. A state of being active is required.

In such cases. The entire keyboard can be configured with touch response.

This requires a high degree of skill in terms of playing technique, and configuring a large number of Q keys with independent touch responses for each key makes the overall configuration complicated and expensive.

This idea was created in consideration of the above points, and it effectively controls only the highest note, which is responsible for the solo part, when multiple keys are operated at the same time, making it possible to create a concerto-like performance. The aim is to provide an electronic musical instrument that allows users to perform various functions, and the inside of the keys operated on the keyboard section! The present invention is characterized in that the highest tone is detected, the highest tone is further independently sounded, and the timbre, signal level, etc. of this sound generation system are controlled by touching the operated highest tone key.

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

The figure shows its configuration, and the sound source circuit 11 is composed of, for example, an oscillator, a branch circuit, and the like.

A sound source signal corresponding to each pitch is generated.

The sound source signal from this sound source circuit 11 is selectively derived in accordance with the operated key by a key switch circuit 13 that is driven in response to the key operation of the keyboard device 12.
The sound source signal derived from the timbre forming circuit 14 forms a timbre and becomes a musical tone signal.

That is, the musical tone signal obtained from this tone forming circuit 14 is in a non-touch response state that is not related to the key touch speed or pressure on the keyboard device 12.

Further, the keyboard device 12 is provided with a highest note detection circuit 15, which detects the pitch of a key corresponding to the highest note among the keys operated on the keyboard device 12.

For example, the keyboard device 12 may be provided with a priority selection switch circuit for the highest note of the operated key, whereby a pitch signal having a voltage value corresponding to the pitch of the selected key is obtained from the highest note detection circuit 15. , the pitch signal from this circuit 15 is sent to a voltage controlled variable frequency oscillator 16 (hereinafter abbreviated as VCO).
is coupled to the oscillation drive signal as an oscillation drive signal.

That is, the VCO 16 can obtain a sound source signal corresponding to the pitch of the highest key among the operating keys, and this sound source signal is formed into a tone by a voltage controlled variable filter 11 (hereinafter abbreviated as VCF). Furthermore, the level is controlled by a voltage-controlled variable gain amplifier 18 (hereinafter abbreviated as VCA), and the highest musical sound signal is extracted.

Then, it is synthesized together with the musical tone signal from the timbre forming circuit 14 in a synthesis resistor circuit 19, the synthesis ratio is appropriately selected and amplified by an amplifier 20, and the sound signal is generated from the bass guitar 21 as a performance sound.

In addition, the above VCO16, VCF17. Control waveform generators 22 and 23 for the VCA 18, respectively.

A system where the voltage value changes over time from 24? @Waveform signals are combined.

The control waveform generators 22 to 24 are coupled with keying signals corresponding to, for example, the depression (key-on) and release (key-off) of the selected highest key from the keyboard device 12. To generate a waveform signal that rises and attenuates from the time of key release.

The waveform of this waveform signal is subjected to rise conditions, sustain conditions, attenuation conditions, etc., set by a resistor voltage divider circuit or the like that constitutes the control circuit 25.

The VCO 16 changes its oscillation frequency minutely over time based on the rising force of the sound source signal.

The sound source signal is rich in naturalness, and the cutoff frequency of the VCFI7 is further changed to produce a musical tone signal rich in musicality.

Further, in the VCAI 8, the amplification factor is changed according to the waveform signal from the waveform generator 24, so that the musical tone signal envelope from the VCF 17 is set.

Furthermore, the keyboard device 12 is provided with a key touch detection mechanism such as the touch speed or pressing force of the selected highest note key,
The key touch detection signal is superimposed on the control waveform from the control waveform generator 24 and supplied to the VCA 18.

Then, the amplification factor of the VCA 18 is changed in response to a key touch, and the musical tone signal obtained from this VCA 18 is made touch-sensitive.

That is, in the electronic musical instrument configured as described above, musical tone signals accompanying performance operations on the keyboard device 12 are basically extracted and played in a non-touch response state.

At the same time, the highest note of the playing key, which becomes the solo part, is sounded even more independently.In particular, the musical sound signal of this highest note is effectively controlled by key touches, etc., so that the played sound can be heard even more independently. Performance can be expressed more effectively than in the bass region.

In the above embodiment, a case has been described in which the key touch detection signal of the highest pitched key from the keyboard device 12 is supplied to the VCA 18, but the present invention is not limited to this. Of course, the oscillation frequency of the VCO 16 and the cant-off frequency of the VCF 17 may be changed in response to a key touch.

As described above, according to the electronic musical instrument according to this invention, the performance sound corresponding to the solo part in particular becomes rich in musicality.

Furthermore, since it is effectively controlled by key touches, it is possible to perform, for example, a concerto very effectively, and it is highly effective in improving expressiveness.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawing is a configuration diagram illustrating an electronic musical instrument according to an embodiment of the invention. 11... Old source circuit, 12... Keyboard device,
13...Key switch, 14...Tone forming circuit, 15...Top sound detection circuit, 16...
...Voltage controlled variable frequency oscillator, 17...
Voltage controlled variable filter, 18... Voltage controlled variable gain amplifier, 22-24... Control waveform generator.

Claims (1)

[Scope of Claim for Utility Model Registration] A keyboard for performing performance operations, a fourth musical tone generating means for generating musical tone signals corresponding to key operations on this keyboard in a non-touch response state, and Detection means for detecting a tone key. a second musical tone generating means for generating a musical tone signal corresponding to the highest pitched key detected by the detecting means; The pitch of the musical tone signal. control means for controlling at least one of timbre and volume, and a musical tone signal in a non-touch response state generated from the first musical tone generating means, and a touch response control generated from the second musical tone generating means. An electronic musical instrument characterized in that each musical tone signal generated by the input signal is generated.