Music – Instruments
Patent
1979-02-09
1980-09-23
Witkowski, S. J.
Music
Instruments
84 12, 84 122, 84 126, G10H 100, G10H 500
Patent
active
042235839
ABSTRACT:
An electronic tone generator of a type in which an audio signal of controlled waveform is generated from a stored master data list of digitally coded words incorporates apparatus for changing the harmonic structure of the waveform with time during the generation of the audio signal. The master data list is computed by generating two data lists of words defining different waveforms and multiplying the two lists together repeatedly while shifting one list relative to the other list by at least one word. The resulting master data list changes with each multiplication following a shift, producing a changing waveform in which the musical frequencies are harmonically related, the waveshape being free of intermodulation distortion.
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Kawai Musical Instrument Mfg. Co. Ltd.
Witkowski S. J.
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