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Digital tone generation system utilizing fixed duration time functions

  • US 4,446,770 A
  • Filed: 08/27/1982
  • Issued: 05/08/1984
  • Est. Priority Date: 09/25/1980
  • Status: Expired due to Fees
First Claim
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1. An electronic musical instrument comprising:

  • player actuated tone frequency selection means, memory means for storing one cycle of a fixed width window function waveform, means responsive to the actuation of the tone selection means for reading said waveform out of said memory at a fixed rate for each cycle thereof independent of the frequency selected and in a repetitive fashion to produce a continuous signal wherein the period of dead time between each successive reading of a cycle of the waveform is selectively adjusted in response to the frequency selected by the tone selection means without changing the width of the read out waveform to thereby produce a continuous train of time sequential said window function waveforms having a frequency inversely inversely proportional to the period of dead time between the commencement of each successive reading, and means responsive to the train of read out waveforms for producing an audible musical tone.

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