JPS6326865Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a portable electronic keyboard instrument that can be carried and played like a guitar or an accordion.

Conventional electronic keyboard instruments such as electronic organs have great advantages over other musical instruments in terms of timbre diversity and ease of musical tone modulation, but they are inconvenient to carry and difficult to play. It was difficult for the audience to see him clearly, and it was difficult for the performers to convey their gestures, so there was a risk that the audience would get bored during solo performances.

Therefore, portable electronic keyboard instruments have been proposed in which electronic keyboard instruments are miniaturized so that they can be played on the go, such as a guitar, but the controllability of musical tones is limited, and these instruments are not satisfactory in terms of performance expression.

This idea was developed in light of this background, and it allows for free control of the musical tones produced by the keyboard when performing in a standing style with a portable electronic keyboard instrument worn on the shoulder, etc., and enhances performance expression. The purpose is to increase the degree of freedom of

Therefore, the portable electronic keyboard instrument according to this invention has a pressure sensor installed at the bottom of the instrument body, and the output of the pressure sensor controls the musical sound generated by playing the keyboard. By pressing it against your body, you can control pitch bend, modulation, volume, etc.

Hereinafter, embodiments of this invention will be described with reference to the accompanying drawings.

1 and 2 are a top view and a bottom view showing an example of the external appearance of a portable electronic keyboard instrument according to this invention, which consists of a main body part 1 and a neck part 2 having a shape similar to an electric guitar.

The top side of the main body 1 is equipped with a keyboard device 3 and a group of tone selection buttons 4 for selecting various tones, as shown in FIG.
As shown by hatching in the figure, the pressure sensor 5 is provided over substantially the entire length in the longitudinal direction.

As shown in FIG. 1, the network section 2 includes operation sections for a pitch bend volume 6, a modulation volume 7, and a volume volume 8, as well as a selection switch for selecting musical tone elements to be controlled by signals from the pressure sensor 5. There are 9 knobs.

As the pressure sensor 5, for example, a piezoelectric effect element, a strain gauge, a pressure sensitive resistor, a semiconductor pressure sensitive element, etc. are covered with a flexible film and adhered or buried.

Next, an example of the musical tone generating circuit in this embodiment will be explained with reference to FIG. In FIG. 3, parts corresponding to those in FIGS. 1 and 2 are given the same reference numerals.

The keyboard device 3 emits a voltage signal KV and a key press signal KON set for each key in response to a key press.

11 is a voltage controlled variable frequency oscillator (hereinafter abbreviated as "VCO"), 12 is a voltage controlled variable filter (hereinafter abbreviated as "VCF"), and 13 is a voltage controlled variable gain amplifier (hereinafter abbreviated as "VCA"). ), 14 is a modulator that provides a tremolo modulation effect, etc., and a musical tone signal is generated by these.

Then, the generated musical tone signal is amplified at low frequency by an amplifier 15 and outputted by a speaker 16. However, due to space and weight considerations, the amplifier 15 and speaker 16 are generally separate output devices from the main body of the instrument. established in

17, 18, 19 are VCO11 and VCF respectively
12. A control waveform generator (hereinafter abbreviated as "EG") that generates a control voltage waveform to control the VCA 13;
20 is a control circuit thereof, and 21 is a voltage-controlled modulation signal generator that supplies a modulation signal to the modulator 14.

Furthermore, 22 is a control voltage generation circuit that generates a control voltage according to the output of the pressure sensor 5, and the generated control voltage CV is transmitted through the selection switch 9.
It is output to either the VCO 11, VCF 12, VCA 13, or modulation signal generator 21.

According to this embodiment, the sound source signal is obtained by controlling the VOC 11 with the control voltage waveform generated from the EG 17 in response to the application of the voltage signal KV generated from the keyboard device 3 when a key is pressed and the key press signal KON. hand,
VCF12 and VCA13 are controlled by control voltage waveforms generated from EG18 and EG19.
A modulator 14 generates a musical tone signal to which a modulation effect such as tremolo is applied.

At this time, by Pitubento Volume 6
By controlling the oscillation frequency of the VCO, it is possible to give a pitch bend effect that slightly raises or lowers the pitch, and by changing the oscillation frequency of the modulation signal generator 21 using the modulation volume 7, the speed of the tremolo can be adjusted. The volume can be adjusted using the volume volume 8.

Furthermore, when the selection switch 9 is OFF, the pressure sensor 5 does not control the musical tone, but by switching the selection switch 9 to any of the terminals a to d, the musical tone is controlled according to the output of the pressure sensor 5. By the control voltage CV generated from the voltage generation circuit 22,
By controlling any one of the VCO 11, VCF 12, VCA 13, and modulation signal generator 21, any one of musical tone elements such as pitch, timbre, volume, and modulation frequency can be controlled.

Therefore, when playing this portable electronic keyboard instrument in a standing style, for example, by pressing the bottom of the instrument body 1 against the thigh as shown in Fig. 4, keyboard operations and various control knobs can be easily controlled. It is now possible to control the musical tones generated by playing the keyboard without using both hands, which are busy operating the keyboard.

This increases the controllability of musical tones and allows for more free performance expression.

Note that this invention is not limited to synthesizer-type electronic musical instruments as shown in FIG.

[Brief explanation of the drawing]

Figures 1 and 2 are top and bottom views showing an example of the external appearance of a portable electronic keyboard instrument according to this invention;
The figure is a block circuit diagram showing an example of the musical tone generating circuit, and FIG. 4 is a diagram showing an example of the performance state. DESCRIPTION OF SYMBOLS 1... Body part, 2... Network part, 3... Keyboard device, 5... Pressure sensor, 9... Selection switch, 2
2...Control voltage generation circuit.

Claims (1)

[Scope of utility model registration request] 1. A portable electronic keyboard instrument, characterized in that a pressure sensor is provided at the bottom of the main body of the portable electronic keyboard instrument, and musical sounds generated by playing the keyboard are controlled by the output of the pressure sensor.