Device for changing and controlling the rate of generating wavef

Details Device for changing and controlling the rate of generating wavef Device for changing and controlling the rate of generating wavef

1990-03-13

1992-06-02

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84607, 364723, G10H 712, G06F 102

Patent

active

051177250

ABSTRACT:
A device for changing and controlling the rate of generating waveform data wherein rate changing data such as phase angle step data corresponding to steps, wherein each pair of contiguous steps has an interval smaller than a preset interval, are necessary. The necessary rate changing data of interval other than the preset rate changing data is obtained by effecting an interpolation from the preset rate changing data. Accordingly, it becomes unnecessary to store the rate changing data obtained by performing the interpolation, and thus, the quantity of the phase angle step data SD to the stored can be greatly reduced.

REFERENCES:
patent: 4348928 (1982-09-01), Sakashita et al.
patent: 4718030 (1988-01-01), Tsutsumi
patent: 4809577 (1989-03-01), Fujita
patent: 4936179 (1990-06-01), Kitagawa

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