Music – Instruments – Electrical musical tone generation
Patent
1992-07-13
1993-12-14
Shoop, Jr., William M.
Music
Instruments
Electrical musical tone generation
84DIG9, G10H 500, G10H 112, H03H 701
Patent
active
052704815
ABSTRACT:
An electronic musical instrument comprises a filter coefficient generator, including a control signal generator for receiving timbre information, tone range information and touch information and for generating the first and second parameters to control a filter characteristic; a trigonometric function generator for generating a trigonometric function value based on the first parameter generated by the control signal generator; and a filter coefficient computing circuit for computing the trigonometric function value generated by the trigonometric function generator and the second parameter generated by the control signal generator. The filter coefficient generator sequentially generates filter coefficients by computation and sends them to a digital filter to continuously change the filter characteristic of the digital filter, thereby producing musical tones.
REFERENCES:
patent: 4433604 (1984-02-01), Ott
patent: 4548119 (1985-10-01), Wachi et al.
patent: 4829463 (1989-05-01), Kakishita et al.
patent: 4907484 (1990-03-01), Suzuki et al.
patent: 5018429 (1991-05-01), Yamaya et al.
Matsunaga Kaoru
Washiyama Yutaka
Donels Jeffrey W.
Kabushiki Kaisha Kawai Gakki Seisakusho
Mason, Jr. Joseph C.
Shoop Jr. William M.
Smith Ronald E.
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