Electronic musical instrument having memories containing wavesha

Details Electronic musical instrument having memories containing wavesha Electronic musical instrument having memories containing wavesha

1976-10-05

1978-12-26

Schaefer, Robert K.

Music

Instruments

84 111, G10H 100

Patent

active

041310497

ABSTRACT:
A plurality of waveshape memories are provided for storing the sampled values of one cycle sinusoidal wave as the fundamental frequency, two cycle sinusoidal wave as the second harmonic, . . . and m cycle sinusoidal wave as the m-th harmonic and, in addition thereto, of harmonic-abundant complex waves such as a triangular wave, a sawtooth wave and a rectangular wave. These waveshape memories are read at the same reading rate. The read out sinusoidal waves and triangular, sawtooth and rectangular waves are controlled in their relative levels in accordance with the tone-color of an intended musical tone wave shape. The sinusoidal waves and the triangular, sawtooth and rectangular waves are thereafter synthesized to produce a desired tone-color wave shape. Since the triangular, sawtooth and rectangular waves contain abundant harmonic components, many kinds of musical tones containing abundant harmonic components can be produced despite a limited number of waveform memories.

REFERENCES:
patent: 3740450 (1973-06-01), Deutsch
patent: 3854365 (1974-12-01), Tomisawa et al.

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