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Polyphonic electronic musical instrument

  • US 5,054,358 A
  • Filed: 03/07/1990
  • Issued: 10/08/1991
  • Est. Priority Date: 08/17/1987
  • Status: Expired due to Term
First Claim
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1. A polyphonic electronic musical instrument for generating a plurality of tone signals through a time-division process on a plurality of channels, said instrument comprising:

  • first memory means for storing a sounding on/off signal for each of the channels;

    second memory means for storing frequency data for each of the channels;

    third memory means for storing the sounding on/off signal stored in said first memory means;

    fourth memory means for storing the frequency data stored in said second memory means;

    sounding on/off signal-transferring means for transferring the sounding on/off signal stored in said first memory means to said third memory means;

    frequency data-transferring means for transferring the frequency data stored in said second memory means to said fourth memory means;

    first means for controlling said sounding on/off signal transferring means such that a sounding off signal is written in an area of said first memory means which corresponds to a plurality of channels assigned to one tone, and the data stored in said first memory means is transferred to said third memory means, after the sounding off signal has been written into said first memory means;

    second means for controlling said frequency data-transferring means such that tone frequency data is written in an area of said second memory means which corresponds to a plurality of channels assigned to said one tone, and the frequency data stored in said second memory means is transferred to said fourth memory means, after the tone frequency data has been written into said second memory means, and after the sounding off signal has been transferred to said third memory means by said first means;

    third means for controlling said sounding on/off signal-transferring means such that a sounding on signal is written in an area of said first memory means which corresponds to a plurality of channels assigned to said one tone, and the data stored in said first memory means is transferred to said third memory means, after the sounding on signal has been written into said first memory means, and after the data stored in said second memory means has been transferred to said fourth memory means by said second means; and

    tone-generating means for starting generating of tone signals phase-synchronized for said channels in response to a sounding on signal and in accordance with the frequency data stored in said fourth memory means, after tone signals are stopped in response to a sounding off signal stored in said third memory means.

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