linuxaudio.org

On Sunday 11 December 2005 21:37, Atte André Jensen was like:

quoted text
> 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