Programmable tone generator

Details Programmable tone generator Programmable tone generator

1981-01-02

1983-07-19

Truhe, J. V.

Music

Instruments

84 119, G10H 100

Patent

active

043937403

ABSTRACT:
A programmable tone generator for an electronic musical instrument generates a tone signal having a desired fundamental frequency and harmonic content. A binary counter serves as a time base for encoding each period of a tone signal waveform onto plural outputs in the form of a binary code. A plurality of programmable tone generation circuits are coupled with selected counter outputs to comprise plural tone signal branches, each providing a tone signal at a selected fundamental frequency and having selected harmonic content. A signal processing circuit associated with each tone signal branch includes a programmable variable code generator and determines the initial content of the output waveform, subsequently either maintaining or changing the fundamental frequency and harmonic content thereof.

REFERENCES:
patent: 3836858 (1974-09-01), Kitano
patent: 4001555 (1977-01-01), Levis et al.
patent: 4099109 (1978-07-01), Abbondanti
patent: 4137810 (1979-02-01), Wheelwright et al.
patent: 4141376 (1979-02-01), Frey
patent: 4205574 (1980-06-01), Hoskinson et al.

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