Musical tone generator using incremental harmonic variation

Music – Instruments

Patent

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Details

Other Related Categories

84 111, 84 119, G10H 106, G10H 700

Type

Patent

Status

active

Patent number

046974903

Description

ABSTRACT:
A keyboard operated musical instrument is disclosed in which musical tones are created by computing waveshapes from a set of harmonic coefficients. Tones with time variant spectra are obtained by scaling each harmonic coefficient in response to a stored set of scaling numbers. An efficient scaling implementation is described which changes the harmonic coefficients by increments of a predetermined ratio. The tone generation system provides a significant reduction in the number of stored numbers in comparison with a simple stored waveform tone generator.

REFERENCES:
patent: 4249448 (1981-02-01), Deutsch et al.
patent: 4273018 (1981-06-01), Deutsch
patent: 4286491 (1981-09-01), Deutsch
patent: 4461200 (1984-07-01), Kitagawa
patent: 4466325 (1984-08-01), Takauji
patent: 4489637 (1984-12-01), Deutsch
patent: 4502360 (1985-03-01), Deutsch
patent: 4549459 (1985-10-01), Deutsch
patent: 4579032 (1986-04-01), Deutsch

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