Polyphonic computer organ

Details Polyphonic computer organ Polyphonic computer organ

1977-03-14

1979-04-17

Schaefer, Robert K.

Music

Instruments

84 112, 84 121, 84 122, G10H 102

Patent

active

041494407

ABSTRACT:
A polyphonic electronic musical instrument in which the complex signal delivered by the instrument is made up of successive samples.
Each sample in the complex signal is the sum of the samples of the different harmonics of the various notes played, at the corresponding amplitudes. A device for scanning the keys and pedals comprises two or three counters which operate in association with one another to detect the number (i) of each played note out of the 12 or 13 notes in an octave, and also detect the number of the corresponding octave (n) and successively calculate the various samples of the harmonics of the note (i, n). The set of operations is performed in a sufficiently short time to produce notes of 6- 10 kHz.

REFERENCES:
patent: 3610799 (1971-10-01), Watson
patent: 3809786 (1974-05-01), Deutsch
patent: 3809790 (1974-05-01), Deutsch
patent: 3823390 (1974-07-01), Tomisawa et al.
patent: 3854366 (1974-12-01), Deutsch
patent: 3875842 (1975-04-01), Kmetz
patent: 3910150 (1975-10-01), Deutsch et al.
patent: 3913442 (1975-10-01), Deutsch
patent: 3992970 (1976-11-01), Chibana et al.
patent: 4033219 (1977-07-01), Deutsch

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