Keith, cents are a relative calculation of distance: 1200 x ( log( f 2/f 1 )/log(2) ); it is not possible to simply say that 'so many' cents equal 'so many' beats. In a low register, a large distance in terms of cents will have a relatively slow beatrate; the opposite is true for the high registers because the frequencies are much faster. Bradley M. Snook Tommy Black: How many cents per beat? Keith McGavern: Approximately .25 cents per beat.
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