diff src/matlab/chromagram_IF.m @ 0:c52bc3e8d3ad tip

user: boblsturm
branch 'default'
added README.md
added assets/.DS_Store
added assets/playButton.jpg
added assets/stopButton.png
added assets/swapButton.jpg
added data/.DS_Store
added data/fiveoctaves.mp3
added data/glock2.wav
added data/sinScale.mp3
added data/speech_female.mp3
added data/sweep.wav
added nimfks.m.lnk
added src/.DS_Store
added src/matlab/.DS_Store
added src/matlab/AnalysisCache.m
added src/matlab/CSS.m
added src/matlab/DataHash.m
added src/matlab/ExistsInCache.m
added src/matlab/KLDivCost.m
added src/matlab/LoadFromCache.m
added src/matlab/SA_B_NMF.m
added src/matlab/SaveInCache.m
added src/matlab/Sound.m
added src/matlab/SynthesisCache.m
added src/matlab/chromagram_E.m
added src/matlab/chromagram_IF.m
added src/matlab/chromagram_P.m
added src/matlab/chromsynth.m
added src/matlab/computeSTFTFeat.m
added src/matlab/controller.m
added src/matlab/decibelSliderReleaseCallback.m
added src/matlab/drawClickCallBack.m
added src/matlab/fft2chromamx.m
added src/matlab/hz2octs.m
added src/matlab/ifgram.m
added src/matlab/ifptrack.m
added src/matlab/istft.m
added src/matlab/nimfks.fig
added src/matlab/nimfks.m
added src/matlab/nmfFn.m
added src/matlab/nmf_beta.m
added src/matlab/nmf_divergence.m
added src/matlab/nmf_euclidean.m
added src/matlab/prune_corpus.m
added src/matlab/rot_kernel.m
added src/matlab/templateAdditionResynth.m
added src/matlab/templateDelCb.m
added src/matlab/templateScrollCb.m

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/matlab/chromagram_IF.m	Sun Jun 18 06:26:13 2017 -0400
@@ -0,0 +1,78 @@
+function Y = chromagram_IF(d,sr,fftlen,nbin,f_ctr,f_sd)
+% Y = chromagram_IF(d,sr,fftlen,nbin,f_ctr,f_sd)
+%  Calculate a "chromagram" of the sound in d (at sampling rate sr)
+%  Use windows of fftlen points, hopped by ffthop points
+%  Divide the octave into nbin steps
+%  Weight with center frequency f_ctr (in Hz) and gaussian SD f_sd
+%  (in octaves)
+%  Use instantaneous frequency to keep only real harmonics.
+% 2006-09-26 [e-mail]
+
+%   Copyright (c) 2006 Columbia University.
+% 
+%   This file is part of LabROSA-coversongID
+% 
+%   LabROSA-coversongID is free software; you can redistribute it and/or modify
+%   it under the terms of the GNU General Public License version 2 as
+%   published by the Free Software Foundation.
+% 
+%   LabROSA-coversongID is distributed in the hope that it will be useful, but
+%   WITHOUT ANY WARRANTY; without even the implied warranty of
+%   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+%   General Public License for more details.
+% 
+%   You should have received a copy of the GNU General Public License
+%   along with LabROSA-coversongID; if not, write to the Free Software
+%   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+%   02110-1301 USA
+% 
+%   See the file "COPYING" for the text of the license.
+
+if nargin < 3;   fftlen = 2048; end
+if nargin < 4;   nbin = 12; end
+if nargin < 5;   f_ctr = 1000; end
+if nargin < 6;   f_sd = 1; end
+
+A0 = 27.5; % Hz
+A440 = 440; % Hz
+f_ctr_log = log(f_ctr/A0) / log(2);
+
+fminl = octs2hz(hz2octs(f_ctr)-2*f_sd);
+fminu = octs2hz(hz2octs(f_ctr)-f_sd);
+fmaxl = octs2hz(hz2octs(f_ctr)+f_sd);
+fmaxu = octs2hz(hz2octs(f_ctr)+2*f_sd);
+
+ffthop = fftlen/4;
+nchr = 12;
+
+% Calculate spectrogram and IF gram pitch tracks...
+[p,m]=ifptrack(d,fftlen,sr,fminl,fminu,fmaxl,fmaxu); 
+
+[nbins,ncols] = size(p);
+
+%disp(['ncols = ',num2str(ncols)]);
+
+% chroma-quantized IF sinusoids
+Pocts = hz2octs(p+(p==0));
+Pocts(p(:)==0) = 0;
+% Figure best tuning alignment
+nzp = find(p(:)>0);
+%hist(nchr*Pmapo(nzp)-round(nchr*Pmapo(nzp)),100)
+[hn,hx] = hist(nchr*Pocts(nzp)-round(nchr*Pocts(nzp)),100);
+centsoff = hx(find(hn == max(hn)));
+% Adjust tunings to align better with chroma
+Pocts(nzp) = Pocts(nzp) - centsoff(1)/nchr;
+
+% Quantize to chroma bins
+PoctsQ = Pocts;
+PoctsQ(nzp) = round(nchr*Pocts(nzp))/nchr;
+
+% map IF pitches to chroma bins
+Pmapc = round(nchr*(PoctsQ - floor(PoctsQ)));
+Pmapc(p(:) == 0) = -1; 
+Pmapc(Pmapc(:) == nchr) = 0;
+
+Y = zeros(nchr,ncols);
+for t = 1:ncols;
+  Y(:,t)=(repmat([0:(nchr-1)]',1,size(Pmapc,1))==repmat(Pmapc(:,t)',nchr,1))*m(:,t);
+end