| http://www.w3.org/ns/prov#value | - The method of claim 23, further comprising:storing an initial phase difference value A0, wherein said initial phase difference value A0 comprises: x/P-k/P2 ; wherein x is time, P is the pitch, and k is a constant; and wherein a first iteration of said summing said phase offset value ??'I-1 (x)* with said phase difference value AI-1 to produce a new phase offset value ??'I (x)* uses initial phase
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