Formula for Converting Speed Ratio to Intervals?

Jul 8, 2009 at 9:16am

Formula for Converting Speed Ratio to Intervals?

Given the ratio of speed for the playback of a sample, how can you convert that ratio to a musical interval? For example, given a ratio of 0.5, the sample is transposed 12 semitones(since it would have to be an octave higher if playing at half its original speed), or -12 semitones for playback ratio of 2? I feel like it has to deal with exponentials but know, unfortunately, very little of math.

#44662
Jul 8, 2009 at 9:23am

From transposition to speed has been covered a number of times overhere, the other way around is, well, the other way around:

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johan

#160728
Jul 8, 2009 at 10:07am

And here it is again in [expr] form!

lh

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#160729

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