Electronic music synthesizer

Music – Instruments

Patent

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Details

84 113, 84 126, G10H 100

Patent

active

041777077

ABSTRACT:
A polyphonic electronic music synthesizer reproduces in real time complex sounds representative of musical instruments and other musical and non-musical sounds from an above-audio frequency signal. The synthesizer includes a sampling circuit for repetitively sampling the high frequency signal to thereby provide a series of samples, successive ones of the samples being produced by sampling the relatively high frequency signal at a rate of approximately once per cycle at instantaneous points in the cycle which are progressively displaced from the previously sampled points. A storage mechanism sequentially stores the samples, and a mechanism is provided for sequentially recombining each of the sample in real time to thereby produce the selected waveform at the desired audio frequency. Preferably, the sampling circuit is implemented digitally. Further, the described sampling technique is utilized to produce from a high frequency periodic waveform a periodic waveform having a waveshape similar to that of the high frequency waveform.

REFERENCES:
patent: 3603809 (1971-09-01), Uchiyama
patent: 3634625 (1972-01-01), Geohegan et al.
patent: 3681756 (1972-08-01), Burkhard et al.
patent: 3749837 (1973-07-01), Doughty
patent: 3781479 (1973-12-01), Swoboda
patent: 3810106 (1974-05-01), Nadler et al.
patent: 3860760 (1975-01-01), Rittenbach
patent: 3869708 (1975-03-01), Schiffman
patent: 3894463 (1975-07-01), Rochelean

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