Electronic musical instrument using filters for timbre control

Details Electronic musical instrument using filters for timbre control Electronic musical instrument using filters for timbre control

1990-11-29

1992-09-22

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84661, 84DIG9, 364723, 36472401, G10H 112

Patent

active

051499029

ABSTRACT:
A filter calculating section has a plurality of basic filters formed on a time-divisional basis. The timbre of a musical tone signal is controlled by a memory section, an accumulator, a selector, an I/O assign section and a control section using the basic filters formed by the filter calculating section. A digital filter coefficient stored in a digital filter coefficient memory is read out using integer data output from a cutoff controller as an address. An interpolation circuit interpolates this digital filter coefficient on the basis of fraction data output from the cutoff controller. Based on the interpolated digital filter coefficient, the timbre of a musical tone signal is controlled.

REFERENCES:
patent: 4554858 (1985-11-01), Wachi et al.
patent: 4677889 (1987-07-01), Deutsch
patent: 4736663 (1988-04-01), Wawrzynek et al.
patent: 4738179 (1988-04-01), Hideo
patent: 4843938 (1989-07-01), Hideo

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