Apparatus for reducing change in timbre at each point where tone

Details Apparatus for reducing change in timbre at each point where tone Apparatus for reducing change in timbre at each point where tone

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.

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