151 lines
7 KiB
HTML
151 lines
7 KiB
HTML
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<!doctype html><html lang='en'><head><title>TPV | SuperCollider 3.9.3 Help</title>
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<meta http-equiv='Content-Type' content='text/html; charset=UTF-8' />
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<script>
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var helpRoot = './..';
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var scdoc_title = 'TPV';
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var scdoc_sc_version = '3.9.3';
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</script>
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<script src='./../scdoc.js' type='text/javascript'></script>
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</head>
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<body onload='fixTOC();prettyPrint()'>
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<div id='toc'>
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<div id='toctitle'>TPV:</div>
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<span class='toc_search'>Filter: <input id='toc_search'></span><ul class='toc'><li class='toc1'><a href='#description'>Description</a></li>
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<ul class='toc'></ul><li class='toc1'><a href='#classmethods'>Class methods</a></li>
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<ul class='toc'><li class='toc3'><a href='#*ar'>ar</a> </li>
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<li class='toc2'><a href='#Inherited%20class%20methods'>Inherited class methods</a></li>
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</ul><li class='toc1'><a href='#instancemethods'>Instance methods</a></li>
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<ul class='toc'><li class='toc2'><a href='#Inherited%20instance%20methods'>Inherited instance methods</a></li>
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</ul><li class='toc1'><a href='#examples'>Examples</a></li>
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<ul class='toc'></ul></ul></div><div class='contents'>
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<div id='menubar'></div>
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<div class='header'>
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<div id='label'>
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<span id='folder'>Classes (extension)</span>
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| <span id='categories'><a href='./../Browse.html#UGens'>UGens</a> > <a href='./../Browse.html#UGens>Analysis'>Analysis</a> | <a href='./../Browse.html#UGens'>UGens</a> > <a href='./../Browse.html#UGens>FFT'>FFT</a></span>
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</div><h1>TPV<span id='superclasses'> : <a href="../Classes/UGen.html">UGen</a> : <a href="../Classes/AbstractFunction.html">AbstractFunction</a> : <a href="../Classes/Object.html">Object</a></span>
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<div class='extension-indicator-ctr' title='This help file originates from a third-party quark or plugin for SuperCollider.'><img class='extension-indicator-icon' alt='Extension' src='./../images/plugin.png'><span class='extension-indicator-text'>Extension</span></div></h1>
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<div id='summary'>Tracking Phase Vocoder</div>
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</div>
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<div class='subheader'>
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<div id='filename'>Source: <a href='file:///Users/zzk/Library/Application Support/SuperCollider/Extensions/NCAnalysisUGens/classes/TPV.sc' title='/Users/zzk/Library/Application Support/SuperCollider/Extensions/NCAnalysisUGens/classes/TPV.sc'>TPV.sc</a></div></div>
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<h2><a class='anchor' name='description'>Description</a></h2>
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<p>Implementation of the McAulay and Quatieri 1986 sinusoidal model, as described in:
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<p>McAulay, R. and Quatieri, T. (1986) <em>"Speech analysis/Synthesis based on a sinusoidal representation"</em>. IEEE Transactions on Acoustics, Speech, and Signal Processing 34(4): 744--754<h2><a class='anchor' name='classmethods'>Class Methods</a></h2>
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<h3 class='method-code'><span class='method-prefix'>TPV.</span><a class='method-name' name='*ar' href='./../Overviews/Methods.html#ar'>ar</a>(<span class='argstr'>chain</span>, <span class='argstr'>windowsize: 1024</span>, <span class='argstr'>hopsize: 512</span>, <span class='argstr'>maxpeaks: 80</span>, <span class='argstr'>currentpeaks</span>, <span class='argstr'>freqmult: 1</span>, <span class='argstr'>tolerance: 4</span>, <span class='argstr'>noisefloor: 0.2</span>, <span class='argstr'>mul: 1</span>, <span class='argstr'>add: 0</span>)</h3>
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<div class='method'>
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<p><h4>Arguments:</h4>
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<table class='arguments'>
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<tr><td class='argumentname'>chain<td class='argumentdesc'>
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<p>[fft] - Audio input to track, which has been pre-analysed by the <a href="./../Classes/FFT.html">FFT</a> UGen; see examples below for the expected FFT size<tr><td class='argumentname'>windowsize<td class='argumentdesc'>
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<p>Window size used for FFT<tr><td class='argumentname'>hopsize<td class='argumentdesc'>
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<p>hop size for FFT, typically half window size<tr><td class='argumentname'>maxpeaks<td class='argumentdesc'>
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<p>Absolute maximum number of allowed peaks to be detected in the spectrum<tr><td class='argumentname'>currentpeaks<td class='argumentdesc'>
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<p>Current number of allowed peaks to be detected in the spectrum<tr><td class='argumentname'>freqmult<td class='argumentdesc'>
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<p>Resynthesis parameter to change frequency; currently causes a gross multiplication of frequency of all sinusoidal components, no envelope compensation<tr><td class='argumentname'>tolerance<td class='argumentdesc'>
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<p>Search area for matching peaks; within tolerance spectral bins<tr><td class='argumentname'>noisefloor<td class='argumentdesc'>
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<p>Minimum magnitude for a candidate peak</table></div><h3><a class='anchor' name='Inherited%20class%20methods'>Inherited class methods</a></h3>
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<div id='inheritedclassmets'></div><h2><a class='anchor' name='instancemethods'>Instance Methods</a></h2>
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<h3><a class='anchor' name='Inherited%20instance%20methods'>Inherited instance methods</a></h3>
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<div id='inheritedinstmets'></div><h2><a class='anchor' name='examples'>Examples</a></h2>
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<pre class='code prettyprint lang-sc'>b.free
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//assumes hop of half fftsize, fine
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b = Buffer.alloc(s,1024,1); //for sampling rates 44100 and 48000
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//b = Buffer.alloc(s,2048,1); //for sampling rates 88200 and 96000
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//d=Buffer.read(s,"sounds/a11wlk01.wav");
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d=Buffer.read(s,"sounds/break");
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(
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{
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var in, fft, output;
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in= SoundIn.ar(0); //PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
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fft = FFT(b, in, wintype:1);
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output=TPV.ar(fft, 1024, 512, 70,MouseX.kr(1,70), MouseY.kr(0.25,3),4,0.2);
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//Out.ar(0,Pan2.ar(output));
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output
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}.play
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)
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(
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{
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var in, fft, output;
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in= PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
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fft = FFT(b, in, wintype:1);
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output=TPV.ar(fft, 1024, 512, 50,50,1.0,MouseX.kr(0.1,100),MouseY.kr(-20,40).dbamp);
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//Out.ar(0,Pan2.ar(output));
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output
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}.play
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)
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(
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{
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var in, fft, output;
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in= PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
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fft = FFT(b, in);
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output=TPV.ar(fft, 1024, 512, 1,1);
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output
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//Out.ar(0,output);
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}.plot(0.05, s, nil, -1.5, 1.5);
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)
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//residual
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b = Buffer.alloc(s,1024,1); //for sampling rates 44100 and 48000
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d=Buffer.read(s,"sounds/break");
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(
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{
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var in, fft, output;
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var input,inputAmp,threshhold,gate;
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in= SoundIn.ar(0); //PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
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//inputAmp = Amplitude.kr(input);
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//threshhold = 0.001; // noise gating threshold
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//gate = Lag.kr(inputAmp > threshhold, 0.01);
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//in= (input * gate);
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fft = FFT(b, in, wintype:1);
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output=TPV.ar(fft, 1024, 512, 50,50,1.0,4,0.2);
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//Out.ar(0,Pan2.ar(output));
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//delay by 512 samples for output, then phase measurement is from centre of frame, so
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output - DelayN.ar(in,0.1, (512+512)/44100)
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}.play
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)</pre>
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<p><div class='doclink'>helpfile source: <a href='file:///Users/zzk/Library/Application Support/SuperCollider/Extensions/NCAnalysisUGens/HelpSource/Classes/TPV.schelp'>/Users/zzk/Library/Application Support/SuperCollider/Extensions/NCAnalysisUGens/HelpSource/Classes/TPV.schelp</a><br>link::Classes/TPV::<br></div></div></body></html>
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