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Re:If You Drive the Right Speed, This Musical Highway Will P... by TheOtherHobbes on Thursday March 24, 2016 @06:22PM (#11356956)
Multiply the speed by the 12th root of 2 (1.059...) to transpose up a semitone. Repeat for further semitones.

When you get to the 12/12 root of 2 you get a factor of 2, which gives you 12 semitones up at double the speed.

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