Programmable tone generator
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United States of America Patent
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Jul 19, 1983
Issued Date -
N/A
app pub date -
Jan 2, 1981
filing date -
Mar 23, 1979
priority date (Note) -
Expired
status (Latency Note)
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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.
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