Musical tone generator with independent time varying harmonics

Details Musical tone generator with independent time varying harmonics Musical tone generator with independent time varying harmonics

1981-07-20

1983-06-14

Truhe, J. V.

Music

Instruments

84 101, 84 111, 84 119, G10H 106

Patent

active

043876226

ABSTRACT:
In a musical instrument having one or more tone generators in which a plurality of data words corresponding to the amplitudes of a corresponding number of evenly spaced points defining the waveform of one cycle of a musical signal are transferred sequentially from a note register to a digital-to-analog converter in repetitive cycles at a rate proportional to the pitch of the tone being generated, apparatus is provided for producing tones having independent time-varying harmonic components. A recursive algorithm is implemented which approximates prespecified harmonic-time curves by piecewise segments of exponential functions. Only a small number of stored curve parameters are required to generate the harmonic-time scale factor for a set of harmonic coefficients.

REFERENCES:
patent: 3956960 (1976-05-01), Deutsch
patent: 4085644 (1978-04-01), Deutsch et al.
patent: 4211138 (1980-07-01), Deutsch

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