Patent ID: 8013234

Claim:
A method for reducing crosstalk from an adjacent movable bass surface and an adjacent movable treble surface to a movable current surface, the movable bass, movable treble, and movable current surfaces a subset of an array of movable surfaces, the method comprising: associating with each said movable bass, treble, and current surface: a BassErr value; a TrebErr value; a linearized and normalized measurement NormLinPos for each said current, said bass, and said treble movable surface, each said measurement NormLinPos derived from the output of each optical detector principally coupled to light reflected from a corresponding said current, said bass, and said treble movable surfaces; computing a bass key crosstalk correction value by multiplying said current movable surface BassErr value by the difference between said bass movable surface NormLinPos and said current movable surface NormLinPos; computing a treble key crosstalk correction value by multiplying said current movable surface TrebErr value by the difference between said movable treble surface NormLinPos and said movable current surface NormLinPos; forming a corrected position value by subtracting said bass key crosstalk correction value and said treble key crosstalk correction value from said current movable surface NormLinPos value.