Music – Instruments
Patent
1981-03-18
1983-08-02
Witkowski, Stanley J.
Music
Instruments
84 122, 84 123, G10H 108, G10H 700
Patent
active
043959318
ABSTRACT:
A method and an apparatus for producing a musical tone of the so-called partial tone synthesizing type are disclosed, in which the sampling frequencies are established with respect to the respective partial tone components to satisfy the sampling theorem, and the highest frequency among the sampling frequencies is used as a reference frequency. Ratios of sampling frequencies of respective partial tone components to the reference frequency are determined. A partial tone component having a ratio of one is calculated with one channel at a period corresponding to the reference frequency whereas a plurality of partial tone components each having a ratio of less than one are combined into a set wherein the sum of the ratios of the combined partial tone components does not exceed one and the plurality of partial tone components are calculated on the time division basis with one channel at periods corresponding to the respective sampling frequencies.
REFERENCES:
patent: 4077294 (1978-03-01), Hiyoshi et al.
patent: 4205577 (1980-06-01), Deutsch
patent: 4231278 (1980-11-01), Deutsch
patent: 4257303 (1981-03-01), Nagai et al.
patent: 4282790 (1981-08-01), Wachi
Nippon Gakki Seizo Kabushiki Kaisha
Witkowski Stanley J.
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