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Pedal control circuits for electronic piano

  • US 4,129,056 A
  • Filed: 12/21/1976
  • Issued: 12/12/1978
  • Est. Priority Date: 12/21/1976
  • Status: Expired due to Term
First Claim
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1. In an electronic musical instrument including a plurality of playing keys each adapted to be moved between a normal position and an operated position and wherein the instantaneous intensity of a musical tone generated in response to movement of a playing key to its operated position is determined by the magnitude of a voltage appearing across a capacitor, a damper circuit including an electronic switch in series with an impedance connected to form a discharge path across said capacitor, a sustaining pedal operative when moved from a normal position to an operated position to disable said damper circuit, and means associated with said playing key for rendering said damper circuit operative upon return of said playing key from its operated to its normal position, the improvement comprising:

  • a sostenuto pedal adapted to be moved between a normal position and an operated position, andcircuit means controlled by said sostenuto pedal for rendering said damper circuit inoperative with respect to musical tones corresponding to those playing keys, and only such keys, as are in the operated position at the moment said sostenuto pedal is moved to its operated position.

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