Contour generator for audio signal

Details Contour generator for audio signal Contour generator for audio signal

1975-06-20

1978-05-23

Schaefer, Robert K.

Music

Instruments

84 113, G10H 102

Patent

active

040904261

ABSTRACT:
A circuit for providing a predetermined contour for the audio signal produced by an electronic musical instrument. A reference potential which is changed under predetermined conditions, and an unidirectional reference current which may also change under some or all of the predetermined conditions, are applied to a circuit which changes the amplitude of the audio signal from its existing level to a level determined by the reference potential at a rate which is determined by the reference current.

REFERENCES:
patent: 3415941 (1968-12-01), Brand
patent: 3422208 (1969-01-01), Barry
patent: 3509263 (1970-04-01), Cordry
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patent: 3617598 (1971-11-01), Woody, Jr.
patent: 3746775 (1973-07-01), Uchiyama
patent: 3828110 (1974-08-01), Colin
patent: 3848142 (1974-11-01), Adachi
patent: 3886836 (1975-06-01), Hiyoshi
patent: 3930429 (1976-01-01), Hill

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