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Electronic musical instrument with waveform memory for storing waveform data based on external sound

  • US 4,667,556 A
  • Filed: 07/29/1985
  • Issued: 05/26/1987
  • Est. Priority Date: 08/09/1984
  • Status: Expired due to Term
First Claim
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1. An electronic musical instrument, comprising:

  • analog-to-digital converting means for converting an analog external sound signal into a digital waveform signal which represents a waveform corresponding to the waveform of said analog external sound signal;

    memory means for storing the digital waveform signal output from said analog-to-digital converting means;

    digital-to-analog converting means for converting the digital waveform signal output from said memory means into an analog sound signal having a waveform determined by said digital waveform signal;

    pitch designating means for designating a pitch of the sound produced based on the analog sound signal derived from said digital-to-analog converting means;

    address control logic circuit means coupled to said memory means for designating memory addresses for writing and reading the digital waveform signal; and

    control means coupled to said address control logic circuit means and to said pitch designating means for supplying to said address control logic circuit means record and reproduce commands for writing and reading said digital waveform signal in and from the memory means, and for instructing said address control logic circuit means to designate a memory address with a speed determined by said pitch designating means when the digital waveform signal is read out from said memory means, so that a sound having a waveform determined by the read out digital waveform signal and a frequency determined by said pitch designating means can be reproduced.

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