Electronic musical instrument

Details Electronic musical instrument Electronic musical instrument

1975-10-21

1977-04-19

Witkowski, Stanley J.

Music

Instruments

84 126, 84 127, G10H 102, G10H 502

Patent

active

040181251

ABSTRACT:
This invention provides an electronic musical instrument capable of producing plural musical tones simultaneously and also capable of controlling the pitch, tone color and volume of the musical tones in response to a player's finger touch on a key.
Transducers capable of electrically detecting the finger touch, i.e. factors including pressure and speed of depression and displacement of the key, are provided for respective keys. Analog outputs of these transducers are sampled and multiplexed in time sharing by each of channels of the number equal to a maximum number of musical tones to be produced simultaneously, and each of the multiplexed signals is held in a corresponding one of condensers provided in the respective channels. The pitch, tone color and volume are controlled in accordance with the magnitudes of voltages held in these condensers. Suitable discharging circuits are connected to these holding condensers. There are also provided means for variably controlling discharging characteristics of the discharging circuits in response to the magnitudes of the voltages held in the condensers and for varying the discharging characteristics stepwisely upon release of the key or at a desired time point thereafter.

REFERENCES:
patent: 3816636 (1974-06-01), Peltz
patent: 3881387 (1975-05-01), Kawakami
patent: 3886836 (1975-06-01), Hiyoshi
patent: 3897709 (1975-08-01), Hiyoshi et al.
patent: 3902397 (1975-09-01), Morez et al.

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