Formant filter generator for an electronic musical instrument

Details Formant filter generator for an electronic musical instrument Formant filter generator for an electronic musical instrument

1987-06-26

1989-03-21

Witkowski, Stanley J.

Music

Instruments

364419, 36472401, 84 11, 84DIG9, G10H 112

Patent

active

048133280

ABSTRACT:
In the production of a desired musical waveform by combining harmonic components corresponding to respective harmonic orders, each harmonic component value is controlled by a selected cut-off harmonic order qc, level Ha and slope of the formant filter characteristic. The cut-off harmonic order qc, the level Ha and the slope values can each be varied over a predetermined range. Therefore, the slope values of the formant filter characteristic are interpolated to raise resolution, by which it is possible to prevent an abrupt change in the formant filter characteristic and suppress the generation of noise.

REFERENCES:
patent: Re31653 (1984-08-01), Takeuchi
patent: 4077294 (1978-03-01), Hiyoshi et al.
patent: 4114497 (1978-09-01), Hiyoshi et al.
patent: 4176577 (1979-12-01), Yamada et al.
patent: 4256004 (1981-03-01), Takeuchi
patent: 4628785 (1986-12-01), Buchla
patent: 4700603 (1987-10-01), Takauji et al.

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