Music – Instruments
Patent
1976-08-09
1978-08-22
Rubinson, Gene Z.
Music
Instruments
84 101, G10H 102
Patent
active
041080394
ABSTRACT:
A digital computer organ in which individual tones are generated by calculating digital data corresponding to the amplitudes of a plurality of sample points within each cycle of the waveform of a selected tone by summing for each point the product of a digitally stored coefficient value and a sine value for each of a predetermined number of harmonics. An addressable memory stores at least one set of digitally coded coefficient values. A coefficient value is read out of the memory for each calculation. The addressing of coefficient values in the memory is under the control of a plurality of multipole switches in the form of drawbars, each position of a drawbar corresponding to an address location in the memory. The drawbars are activated in sequence so that each one selects in sequence the next coefficient value read out of memory according to the setting of the drawbar.
REFERENCES:
patent: 3610799 (1971-10-01), Watson
patent: 3727510 (1973-04-01), Cook, Sr.
patent: 3755609 (1973-08-01), Millet et al.
patent: 3757023 (1973-09-01), Peterson
patent: 3809786 (1974-05-01), Deutsch
patent: 3809790 (1974-05-01), Deutsch
patent: 3913442 (1975-10-01), Deutsch
patent: 3935781 (1976-02-01), Katoh et al.
patent: 3992971 (1976-11-01), Chibana et al.
Kawai Musical Instrument Mfg. Co. Ltd.
Miska Vit W.
Rubinson Gene Z.
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