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Polyphonic electronic musical instrument

  • US 5,007,323 A
  • Filed: 08/01/1988
  • Issued: 04/16/1991
  • Est. Priority Date: 08/07/1987
  • Status: Expired due to Term
First Claim
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1. A polyphonic electronic musical instrument for simultaneously generating a plurality of tone signals through a time-division process on a plurality of channels, comprising;

  • first memory means for storing tone waveform data;

    second memory means for storing waveform control data including access data for accessing said first memory means for each channel;

    allotting means for successively allotting on a time-division basis a channel time for each of a plurality of channels as a process time of that channel;

    dividing means for dividing each channel time alloting by said allotting means into a plurality of divisions; and

    read/write control means for functioning in at least one division of time provided by said dividing means for accessing said first memory means by reading out the waveform control data corresponding to the current channel time from said second memory means, and also for functioning in at least one of the remaining divisions of time for writing the waveform control data of a given channel designated at that time to be changed in an area of said second memory means corresponding to said given channel.

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