Touch responsive electronic piano

Details Touch responsive electronic piano Touch responsive electronic piano

1977-04-20

1978-10-24

Schaefer, Robert K.

Music

Instruments

84 11, 84DIG7, G10H 100

Patent

active

041214900

ABSTRACT:
A keyboard operated polyphonic tone synthesizer which is touch responsive to the force applied to the keyboard mechanism. Operation of a key operates through a pneumatic transducer to provide an air stream having a velocity proportional to the force applied to the key. A transducer responsive to the velocity of the gas produces an output pulse having a peak amplitude proportional to the peak velocity of the air. This voltage in turn is used to control the peak amplitude of a musical tone generated in response to the operation of the key so that a direct relation exists between the force with which the key is operated and the amplitude of the resulting sound generated by the instrument.

REFERENCES:
patent: 2790043 (1957-04-01), Clason
patent: 3344625 (1968-07-01), Grow
patent: 3705254 (1972-12-01), Amano
patent: 3708605 (1973-01-01), Ohno
patent: 3835235 (1974-09-01), Amano
patent: 3845683 (1974-11-01), Lehmann
patent: 3908504 (1975-09-01), Deutsch
patent: 3939316 (1976-02-01), Stropkay
patent: 4018125 (1977-04-01), Nishimoto
patent: 4033219 (1977-07-01), Deutsch
patent: 4052924 (1977-10-01), Deutsch

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