On Monday 12 December 2005 07:00,
linux-audio-user-request@email-addr-hidden wrote:
Atte wrote:
> Suppose I have an A with a frequency of 440 hz. Which
> formula should I use for transposing x semitones up/down?
> So which frequency would the Bb a half step higher for
> instance have? What about cents (1/100's of half steps)?
The exact formula is that, to go up a semitone, you multiply
the frequency by the 12th root of 2, that is 2 to the power
of 1/12. I'm not sure how it works with cents, but I'm
guessing that the ratio is 2 to the power of 1/1200.
Peter Clarke
Received on Mon Dec 12 16:15:11 2005
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