On Monday 12 December 2005 07:00, linux-audio-user-request@xxxxxxxxxxxxxxxxxx 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
