Electronic musical instrument using addition of independent part

Details Electronic musical instrument using addition of independent part Electronic musical instrument using addition of independent part

1988-06-07

1989-05-30

Witkowski, Stanley J.

Music

Instruments

84 126, 84DIG10, G10H 104, G10H 1053, G10H 108

Patent

active

048339636

ABSTRACT:
An electronic musical instrument comprising a host processor (10), process/engine interface (12) and sound engine (14) the latter utilizing partial control chip modules (32, 34) and a data path chip module (36) to effect multiple partial (Fourier) synthesis, in conjunction with a sound modelling technique, to generate up to 240 independent partials and impress time-varying amplitude envelopes on them and select and apply them to sound generation, each partial being controlled by selected parameters of frequency, amplitude, phase and attack/decay rate. A modulo-sumdither and oversampling approach to noise reduction is utilized in connection with the data path chip arrangement. Log sine addition is utilized to avoid multiplication apparatus ordinarily required to combine sine wave defining parameters.

REFERENCES:
patent: 4418600 (1983-12-01), Wachi

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