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Cerra Joseph P, Visconti Michael P Iii: Systems and methods for synchronizing music. Tufts University, Cerra Joseph P, Visconti Michael P Iii, GOETZ Robert A, January 11, 2007: WO/2007/005625

The present invention relates to music systems. In particular, the present invention relates to music systems capable of altering the rate of play (e.g., beats per time interval) of a musical piece such that it matches a user's rate of movement per time interval.