Electronic organ circuit

Details Electronic organ circuit Electronic organ circuit

1981-06-01

1983-07-19

Witkowski, Stanley J.

Music

Instruments

84345, 84370, G10B 310, G10H 124

Patent

active

043937411

ABSTRACT:
An electronic organ circuit includes a multiplicity of keyers receiving control inputs from plural shift and store registers capable of operating any given keyer at different levels. The inputs for a given keyer are applied on a cyclic basis and for differing time periods in such manner that the keyer's output amplitude and waveshape vary in response to the number and duration of inputs. A processor responsive to keyboard key and stop actuation supplies information to shift register chains corresponding bit-wise to the operation of keyboard keys, and corresponding, in respect to bits destined for a given register, to the condition of organ stops. Individual registers are then operated on a duty cycle basis and provide outputs of selected duration for effecting different stop sounds.

REFERENCES:
patent: 4092895 (1978-06-01), Zabel
patent: 4173167 (1979-11-01), Stanley
patent: 4294155 (1981-10-01), Turner
patent: 4343216 (1982-08-01), Swain et al.

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