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Method and apparatus for reproducing pedaling effects in a piano performance
Method and apparatus for reproducing pedaling effects in a piano performance
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机译：在钢琴演奏中再现踏板效果的方法和装置
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摘要
There is disclosed a method and apparatus for reproducing in a player piano the pedal mechanism movements which approximate those of the original performance from a tape or other recording medium on which has been recorded data representative of the sequential positions of the piano pedal mechanisms during the original performance. A playback mechanism reads the desired pedal positions from a digitally encoded tape, and this is converted to an analog voltage representative of the desired pedal position. The voltage is then differentiated as a function of time to produce a voltage that is representative of the velocity of the pedal mechanism. A velocity sensor in the form of a permanent magnet within a coil senses the movement of the pedal mechanism in the reproducing piano to create a second signal proportional to the actual velocity of the pedal mechanism. These two signals are compared and applied through an operational amplifier to the solenoid which moves the pedal mechanism in the player piano, thereby approximating the movement of the pedal mechanism during the recorded performance.
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