Alterable voice for electronic musical instrument

Details Alterable voice for electronic musical instrument Alterable voice for electronic musical instrument

1976-08-18

1978-04-11

Jackmon, Edith S.

Music

Instruments

84 103, 84 117, 84 124, G10F 100, G10H 102, G10H 306

Patent

active

040832821

ABSTRACT:
Tone generation in a musical instrument is accomplished by repetitively computing a Fourier algorithm using stored sets of harmonic coefficients. An alterable voice is obtained by optically reading a data card, converting the data to a data format used by the tone generating circuitry, and storing the converted data to be employed as a set of harmonic coefficients. Harmonic coefficient data is encoded on the data card by imprinting columns of opaque areas. The length of each column is measured by sequentially scanning a linear array of light sources. Insertion of the data card in an enclosure automatically initializes the reading circuitry and removing the card causes each opaque data column to be measured in turn and the result converted to a harmonic component.

REFERENCES:
patent: 3515792 (1970-06-01), Deutsch
patent: 3833750 (1974-09-01), Iorio
patent: 3908504 (1975-09-01), Deutsch
patent: 3956960 (1976-05-01), Deutsch

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