12 Dec
2005
12 Dec
'05
12:41 p.m.
On Sunday 11 December 2005 21:37, Atte André 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