Electronic musical instrument

Details Electronic musical instrument Electronic musical instrument

1976-11-17

1978-08-22

Weldon, Ulysses

Music

Instruments

84 121, 84 111, G10H 102

Patent

active

041080408

ABSTRACT:
An electronic musical instrument wherein instantaneous amplitude values of respective harmonics of a musical tone waveform are individually provided in accordance with a numerical value corresponding to the frequency of the depressed key for the musical tone, each of harmonic amplitude coefficients setting relative amplitudes of the respective harmonics is multiplied with corresponding one of the instantaneous amplitude values and the multiplication products are aligned with respect to time thereby to obtain a musical tone of a desired tone color, i.e. of a desired frequency spectrum construction. The harmonic amplitude coefficients are given as values corresponding to a multipeak spectrum construction.
The harmonic amplitude coefficients are provided by a filter having a multipeak characteristic. This filter produces harmonic amplitude coefficients which change in accordance with the order of the harmonics and/or time and has a multipeak filter characteristic such that the origin of the frequency is shifted with lapse of time or the bandwidth of a single peak changes in accordance with the order of the harmonics or lapse of time.

REFERENCES:
patent: 3809786 (1974-05-01), Deutsch
patent: 3956960 (1976-05-01), Deutsch
patent: 4000675 (1977-01-01), Futamase et al.
patent: 4026179 (1977-05-01), Futamase

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