Generation of noise-like tones in an electronic musical instrume

Details Generation of noise-like tones in an electronic musical instrume Generation of noise-like tones in an electronic musical instrume

1978-03-27

1980-03-25

Truhe, J. V.

Music

Instruments

84 103, 364717, G10H 102

Patent

active

041944275

ABSTRACT:
An electronic tone synthesizer in which a master data list of digital values representing the amplitudes of points defining the waveform of a musical tone are transferred to a digital-to-analog converter at a rate proportional to the pitch of the tone being generated. Noise is superimposed on the musical tone by means of a random binary signal generator which controls a circuit for modifying selected ones of the digital values as they are transferred from the master data list to the converter. Modification of the selected values may be by a right shift operation, a 2's complement operation, or by selective delay.

REFERENCES:
patent: 3247308 (1966-04-01), Peterson
patent: 3548174 (1970-12-01), Knuth
patent: 3740450 (1973-06-01), Deutsch
patent: 4022098 (1977-05-01), Deutsch
patent: 4038898 (1977-08-01), Kniepkamp
patent: 4085644 (1978-04-01), Deutsch et al.

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