Music – Instruments – Electrical musical tone generation
Patent
1997-11-04
1999-03-23
Witkowski, Stanley J.
Music
Instruments
Electrical musical tone generation
84621, 84DIG9, G10H 702
Patent
active
058862781
ABSTRACT:
A tone waveform reproduction apparatus, for an electronic musical instrument employing a plurality of samples in consonance with tone ranges, that can reduce a change in a timbre so that it will not be noticeable, and that can provide a natural transition of musical tones. An address generator generates a read address for a waveform memory. In the waveform memory are stored waveform data that differ for each timbre and each specific pitch range. A digital filter has a low-pass property and is controlled by a cutoff controller to adjust a timber or a tone quality. The cutoff controller generates a cutoff control signal for compensating for a discontinuity, at a point where tone ranges are switched, of reproduced frequencies of tone signals extracted from the waveform memory, and outputs the cutoff control signal fcn.
REFERENCES:
patent: 4942799 (1990-07-01), Suzuki
patent: 5050474 (1991-09-01), Ogawa et al.
patent: 5262582 (1993-11-01), Hanzawa et al.
patent: 5597970 (1997-01-01), Sato et al.
Kawai Musical Instruments Manufacturing Co. Ltd.
Witkowski Stanley J.
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