Digital keying system for an electronic musical instrument

Details Digital keying system for an electronic musical instrument Digital keying system for an electronic musical instrument

1977-08-04

1979-04-24

Scott, James R.

Music

Instruments

84 113, G10H 100

Patent

active

041505999

ABSTRACT:
A digital keying system for an electronic musical instrument, such as an electronic organ, comprises a digital percussion generator which synchronizes the operation of a variable attentuator with the zero crossings of a sine wave signal applied to the input of the attenuator from a waveform generator. Pulses from a rhythm generator are applied to a coincidence gating circuit along with pulses corresponding the zero crossings of the sine wave signal from the waveform generator to synchronize the stepped operation of the variable attenuator with the zero crossings of the sine wave signal applied to it.

REFERENCES:
patent: 3908504 (1975-09-01), Deutsch
patent: 3977291 (1976-08-01), Southard
patent: 4072078 (1978-02-01), Schallensberger et al.

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