Touch sensitive polyphonic musical instrument

Details Touch sensitive polyphonic musical instrument Touch sensitive polyphonic musical instrument

1974-10-29

1977-08-30

Witkowski, Stanley J.

Music

Instruments

84 119, 84 124, 84DIG7, 84DIG9, 333 70CR, 333 70S, 340365A, G10H 102, G10H 502

Patent

active

040446425

ABSTRACT:
A touch sensitive device is associated with at least one key of an electronic musical instrument such as an electronic organ, includes a layer of a pressure responsive, variable conductance material, and exhibits a switching action when subjected to pressure beyond a threshold pressure, any increase in pressure thereafter providing an increase in conductance up to a saturation pressure. The device may be used either as a combined switch and amplitude control or may be used in associated with one or more capacitors to provide either a high pass or low pass touch-control audio filter. In a totally polyphonic instrument a tone generator and touch-control filter are respectively associated with and responsive to each key depression, the output signal from each activated filter being coupled preferably to audio mixer circuitry.

REFERENCES:
patent: 3609201 (1971-09-01), Adachi
patent: 3617666 (1971-11-01), Braue
patent: 3626350 (1971-12-01), Suzuki et al.
patent: 3699294 (1972-10-01), Suddeth

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