Signal shape controller

Details Signal shape controller Signal shape controller

1983-12-15

1985-08-06

Witkowski, Stanley J.

Music

Instruments

84 124, 84 126, 381 51, G10H 1057

Patent

active

045328498

ABSTRACT:
An electronic signal X can have its envelope shaped by an electronic control signal Y. For music purposes, signal X can be an electronically generated note and control signal Y can be derived from the musician's voice. The signal shape controller exponentially modifies the control signal Y and multiplies signal X by the exponentially modified control signal Y to form an output signal having an envelope shape XY.sup.n. The exponent n has at least one value less than 1 applied to larger values of control signal Y and at least one value greater than 1 applied to lower levels of control signal Y. The controller also preferably includes an attack enhancement circuit to emphasize an attack portion of a control signal and a variable time integrator circuit that integrates the control signal over a short time interval when it is changing rapidly and over a longer time interval when it is changing slowly.

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