Method for digitally controlling the envelope curve in a polypho

Details Method for digitally controlling the envelope curve in a polypho Method for digitally controlling the envelope curve in a polypho

1981-06-23

1983-12-27

Isen, F. W.

Music

Instruments

84 113, G10H 102

Patent

active

044223633

ABSTRACT:
Envelope curves for a large number of individual sounds to be digitally synthesized are generated by storing sample envelope shapes. The duration of the stored curves is varied by exercising control over the sampling of the stored envelopes. The smooth transition from one envelope curve to another is accomplished by sampling the new curve at a fast rate until substantially matching values of the previous and new curve are found and then proceeding with the sampling of the new curve at the desired rate.

REFERENCES:
patent: 4083283 (1978-04-01), Hiyoshi et al.
patent: 4166405 (1979-09-01), Hiyoshi et al.
patent: 4336736 (1982-06-01), Mishima

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