Mercurial > hg > adaptinstrspec

annotate functions/getNumBinsPerSemitoneFromFreqVec.m @ 0:b4e26b53072f tip

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Initial commit.
author Holger Kirchhoff <holger.kirchhoff@eecs.qmul.ac.uk>
date Tue, 04 Dec 2012 13:57:15 +0000
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holger@0 1 function numBinsPerSemitone = getNumBinsPerSemitoneFromFreqVec(freqsInHz)
holger@0 2 % numBinsPerSemitone = getNumBinsPerSemitoneFromFreqVec(freqsInHz)
holger@0 3 %
holger@0 4 % infers the number of bins per semitone from a given constant-Q frequency
holger@0 5 % vector in Hz
holger@0 6
holger@0 7 ratios = freqsInHz(2:end) ./ freqsInHz(1:end-1);
holger@0 8 avgRatio = mean(ratios);
holger@0 9 numBinsPerSemitone = round( 1/(12*log2(avgRatio)) );