Electronic music system producing vibrato and tremolo effects

Details Electronic music system producing vibrato and tremolo effects Electronic music system producing vibrato and tremolo effects

1996-09-12

1998-06-09

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

381 62, G10H 1043

Patent

active

057638071

ABSTRACT:
An electronic music system adapted to generate tone waves of different pitch, amplitude and duration which, when reproduced, create musical tones whose expressive qualities emulate the expressive quality of natural tones producible by acoustic instruments or the human voice. The system includes a tone wave generator, the carrier of which is frequency modulated by an asymmetrical wave whose major component is a sinusoidal wave and whose minor component superimposed on the sinusoidal wave is the second harmonic of that wave. The frequency of the sinusoidal wave is such that as the carrier is frequency-modulated, its frequency is periodically varied above and below its normal value so that the resultant tone exhibits a vibrato effect. And the carrier is at the same time amplitude modulated so that it is periodically varied in amplitude to impart to the resultant tone a tremolo effect whereby the tone yielded by the system emulates a natural tone. The rise and fall time of the vibrato on the tones is variable and related to the musical structure.

REFERENCES:
patent: 2905040 (1959-09-01), Hanert
patent: 3257495 (1966-06-01), Williams
patent: 3378623 (1968-04-01), Park
patent: 3626077 (1971-12-01), Munch et al.
patent: 3973462 (1976-08-01), Uchiyama
patent: 4072079 (1978-02-01), Sharp
patent: 4304162 (1981-12-01), Schreier

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