From: Owen Green (owen@owengreen.net)
Date: Sun Nov 07 2010 - 14:29:24 EST
On 07/11/2010 16:27, lawrence casserley wrote:
> Pitch relationships are related to powers of 2 - an octave ratio is
> 1:2 - an equally tempered minor second is 1:12th root of 2, ie
> 1.059463094359 - a major second is 1:6th root of 2, ie 1.122462048309
> - so the pitch change will be between a minor and a major second.
Specifically,
If x^y means x to the power of y
and log2 means base 2 logarithm
the ratio for a 12ET interval is
2^(interval / 12)
therefore the interval given by a ratio is
12 * log2(ratio)
So we can confirm Kevin's result
12 * log2(44.1/48) = 1.467 semitones
Yours nerdliy...
This archive was generated by hypermail 2.1.5 : Thu Dec 23 2010 - 18:30:23 EST