System and method for actuating keys with different lever advantages
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United States of America Patent
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May 18, 2010
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app pub date -
Jan 15, 2008
filing date -
Jan 15, 2008
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Abstract
The keys in a reproducing piano are actuated by a plurality of solenoids, one for each key to be played. The solenoids are arranged along the width of the keyboard and deviated from each other in the front-back direction of the keys in a staggered manner. A consequence of this arrangement is that the mechanical lever advantage of some solenoids is greater than the mechanical lever advantage of others, and as a result, some keys are played more loudly than others. In order to correct this problem, the drive applied to a solenoid is adjusted to compensate for the mechanical lever advantage, thereby allowing a performance to be accurately reproduced.
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