On Sun, 2005-12-11 at 22:37 +0100, Atte Andr? Jensen 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)? To transpose X semitones up, multiply the frequency with 2^(X/12). To transpose down, just use a negative X. For C cents it should be 2^(C/1200). Bb above A440 has the frequency 440 * 2^(1/12) = 466.16. -- Lars Luthman PGP key: http://www.d.kth.se/~d00-llu/pgp_key.php Fingerprint: FCA7 C790 19B9 322D EB7A E1B3 4371 4650 04C7 7E2E -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: This is a digitally signed message part Url : http://music.columbia.edu/pipermail/linux-audio-user/attachments/20051211/7c9f9fa6/attachment.bin
