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Apparatus for controlling sound volume of electronic musical instrument

  • US 4,913,025 A
  • Filed: 02/02/1988
  • Issued: 04/03/1990
  • Est. Priority Date: 02/03/1987
  • Status: Expired due to Term
First Claim
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1. In an apparatus for controlling the sound volume of an electronic musical instrument in which the amplitude of a sound signal is controlled by a volume control signal obtained through operation of at least one depressible volume selection switch, and a volume indicator device that corresponds to the sound volume is then acutated thereby, the improvement which comprises:

  • first and second depressible volume selection switches which are arranged adjacent to each other in an apparatus body, each of said volume selection switches having an operation member with an upper end being so formed as to have an arcuate surface and so disposed as to be slightly protruding beyond a surface of said apparatus body;

    means for producing a first volume control signal that corresponds to a first sound volume in response to depression of said first volume selection switch alone;

    means for producing a second volume control signal that corresponds to a second sound volume different than said first sound volume in response to depression of said second volume selection switch alone; and

    means for producing a third volume control signal, in response to simultaneous depression of said first and second volume selection switches, that corresponds to a sound volume intermediate said first and second sound volumes.

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