Formant filter generator for an electronic musical instrument
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United States of America Patent
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-
Mar 21, 1989
Grant Date -
N/A
app pub date -
Jun 26, 1987
filing date -
Sep 2, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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