On Sunday 11 December 2005 21:37, Atte Andr? Jensen was like: > 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)? It's something like: Pitch (Hz) = log(27.5/log(2)) + chromatic_note/12 for 12Tet, but I would check this out as I'm slightly mathematically dyslexic. -- cheers, tim hall http://glastonburymusic.org.uk/tim
