467 lines
15 KiB
HTML
467 lines
15 KiB
HTML
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<!doctype html><html lang='en'><head><title>SMS | SuperCollider 3.12.2 Help</title>
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<link rel='stylesheet' href='./../scdoc.css' type='text/css' />
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<link rel='stylesheet' href='./../codemirror.css' type='text/css' />
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<link rel='stylesheet' href='./../editor.css' type='text/css' />
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<link rel='stylesheet' href='./../frontend.css' type='text/css' />
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<link rel='stylesheet' href='./../custom.css' type='text/css' />
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<meta name='viewport' content='width=device-width, initial-scale=1'>
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<meta http-equiv='Content-Type' content='text/html; charset=UTF-8' />
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<script src='./../lib/jquery.min.js'></script>
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<script src='./../lib/codemirror-5.39.2.min.js' type='text/javascript'></script>
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<script src='./../lib/codemirror-addon-simple-5.39.2.min.js' type='text/javascript'></script>
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<script>
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var helpRoot = './..';
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var scdoc_title = 'SMS';
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var scdoc_sc_version = '3.12.2';
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</script>
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<script src='./../scdoc.js' type='text/javascript'></script>
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<script src='./../docmap.js' type='text/javascript'></script>
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<script src='qrc:///qtwebchannel/qwebchannel.js' type='text/javascript'></script>
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</head>
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<body onload='fixTOC()'>
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<div id='toc'>
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<div id='toctitle'>SMS:</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 id='menubar'></div>
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<div class='contents'>
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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></span>
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</div><h1>SMS<span id='superclasses'> : <a href="../Classes/MultiOutUGen.html">MultiOutUGen</a> : <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'>Spectral Modeling Synthesis</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/SC3plugins/NCAnalysisUGens/classes/SMS.sc' title='/Users/zzk/Library/Application Support/SuperCollider/Extensions/SC3plugins/NCAnalysisUGens/classes/SMS.sc'>SMS.sc</a></div></div>
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<h2><a class='anchor' name='description'>Description</a></h2>
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<p>An implementation of the sines+noise model first described by Xavier Serra in his 1989 PhD thesis; an input sound is analysed in terms of sinusoidal components by a peak tracking phase vocoder. The error between the sinusoidal reconstruction and the original signal (the residual) is then modeled by a noise model of filtered white noise. The sines part and the noise part are separately resynthesised, allowing independent transformations.
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<p>For technical details see:
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<p>Xavier Serra and Julius O. Smith (1990) <em>"Spectral Modeling Synthesis: A Sound Analysis/Synthesis System Based on a Deterministic plus Stochastic Decomposition"</em>. Computer Music Journal 14(4): 12--24<div class='note'><span class='notelabel'>NOTE:</span> this plugin assumes block size of 64 and is optimised for 44100 sampling rate (internally, it uses 1024 point FFTs).</div><h2><a class='anchor' name='classmethods'>Class Methods</a></h2>
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<h3 class='method-code'><span class='method-prefix'>SMS.</span><a class='method-name' name='*ar' href='./../Overviews/Methods.html#ar'>ar</a>(<span class='argstr'>input</span>, <span class='argstr'>maxpeaks: 80</span>, <span class='argstr'>currentpeaks: 80</span>, <span class='argstr'>tolerance: 4</span>, <span class='argstr'>noisefloor: 0.2</span>, <span class='argstr'>freqmult: 1.0</span>, <span class='argstr'>freqadd: 0.0</span>, <span class='argstr'>formantpreserve: 0</span>, <span class='argstr'>useifft: 0</span>, <span class='argstr'>ampmult: 1.0</span>, <span class='argstr'>graphicsbufnum</span>, <span class='argstr'>mul: 1.0</span>, <span class='argstr'>add: 0.0</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'>input<td class='argumentdesc'>
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<p>Audio rate input to be analysed<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'>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 (measured as spectral magnitude)<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<tr><td class='argumentname'>freqadd<td class='argumentdesc'>
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<p>Resynthesis parameter to change frequency; currently causes a gross addition of a frequency to all sinusoidal components<tr><td class='argumentname'>formantpreserve<td class='argumentdesc'>
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<p>Even if changing the frequencies of sinusoidal partial tracks, re-impose the original magnitude spectrum so as to keep the formants (spectral envelope preservation). 0 is off, otherwise on (there is a small performance hit).<tr><td class='argumentname'>useifft<td class='argumentdesc'>
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<p>Use IFFT based resynthesis, which is lower quality, but substantially more efficient<tr><td class='argumentname'>ampmult<td class='argumentdesc'>
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<p>amplitude multiplier for internal compensation for window power loss within algorithm. Usually leave as default of 1.0.<tr><td class='argumentname'>graphicsbufnum<td class='argumentdesc'>
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<p>Will fill a user provided buffer with sines + noise data; the buffer must be size 1 + 513 + 5*(maxsines). The first entry will be the number of sines active for that polled frame. Default for this argument is -1, meaning do not write any status data. See the example with live plotting at the base of this help file.</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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<textarea class='editor'>//sine reconstruction left channel, noises on right
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(
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{
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var in, fft, output;
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in= SoundIn.ar(0);
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output=SMS.ar(in, 50,MouseY.kr(1,50), 8, 0.3); //or freqmult: MouseX.kr(0.5,4)
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output
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}.play
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)
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//sum reconstruction channels to simulate effect of straight through
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(
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{
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var in, fft, output;
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in= SoundIn.ar(0);
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output=SMS.ar(in, 50,MouseY.kr(1,50), 8, 0.3); //or freqmult: MouseX.kr(0.5,4)
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output.sum.dup
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}.play
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)
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//just noise residual
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d=Buffer.read(s,Platform.resourceDir +/+ "sounds/a11wlk01.wav");
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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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output=SMS.ar(in, 50,50, MouseX.kr(1.0,10.0).round(1.0),MouseY.kr(0.1,20.0,'exponential'), 1.0);
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Out.ar(0,Pan2.ar(output[1]));
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}.play
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)
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//frequency multiplication and shift with formant preservation
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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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output=SMS.ar(in, 60,60, 4.0,0.2, MouseX.kr(0.5,4), MouseY.kr(0,1000), 1.0);
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Out.ar(0,Pan2.ar(output[0]));
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}.play
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)
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//transient detection via Pitch hasFreq output
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//could have freq input and transient detection input to SMS to control rendering
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(
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{
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var in, fft, sines, noise, freq, hasFreq;
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//in= SoundIn.ar(0);
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in=PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
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#freq, hasFreq= Pitch.kr(in);
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#sines, noise=SMS.ar(in, 50,50, 8, 1.0, MouseX.kr(0.5,4));
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Pan2.ar(sines*(hasFreq.lag(0.01,0.01)) + LPF.ar(noise,MouseY.kr(100,10000,'exponential')),0.0)
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}.play
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)
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//alternative; only pass into SMS if not a transient region
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(
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{
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var in, fft, sines, noise, freq, hasFreq;
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//in= SoundIn.ar(0);
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in=PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
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#freq, hasFreq= Pitch.kr(in);
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#sines, noise=SMS.ar(if(hasFreq,in, Silent.ar), 50,50, 8, 1.0, MouseX.kr(0.5,4));
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if(hasFreq,Pan2.ar(sines + LPF.ar(noise,MouseY.kr(100,10000,'exponential')), 0.0),0.25*in)
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}.play
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)
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//having fun
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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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output=SMS.ar(in, 60,60, 4.0,0.2, MouseX.kr(0.5,4), MouseY.kr(0.0001,10000,'exponential'), LFNoise0.kr(2,0.5,0.5).round(1));
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Out.ar(0,Pan2.ar(AllpassC.ar(output[0],0.05,LFNoise2.kr(10,0.02,0.025),0.5) + CombL.ar(output[1],0.1,0.1,2),0.0));
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}.play
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)
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//having even more fun
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(
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{
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var in, fft, output;
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in=SoundIn.ar(0);
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output=SMS.ar(in, 60,60, 4.0,0.1, MouseX.kr(0.01,10), MouseY.kr(-1000,1000), 0.0);
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Out.ar(0,Pan2.ar(CombL.ar(output[1],0.02,0.02,0.5) + output[0]));
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}.play
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)
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//testing IFFT resynthesis
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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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output=SMS.ar(in, 300,MouseY.kr(1,300), 10.0,0.01, MouseX.kr(0.5,4), 0, 1.0, 1);
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Out.ar(0,output);
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}.play
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)
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//just sines
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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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output=SMS.ar(in, 500,500, MouseX.kr(1.0,10.0).round(1.0),MouseY.kr(0.001,20.0,'exponential'), 1.0, 1.0,0,1);
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Out.ar(0,Pan2.ar(output[0]));
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}.play
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)
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//having even more fun, this time with IFFT
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(
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{
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var in, fft, output;
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in=SoundIn.ar(0);
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output=SMS.ar(in, 200,200, 4.0,0.1, MouseX.kr(0.01,10), MouseY.kr(-1000,1000), 0.0, useifft:1);
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Out.ar(0,Pan2.ar(CombL.ar(output[1],0.02,0.02,0.5) + output[0]));
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}.play
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)
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//experimenting with ampmult
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(
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{
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var in, fft, output;
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in=SoundIn.ar(0);
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output=SMS.ar(in, 200,200, 4.0,0.01,MouseY.kr(0.01,100,'exponential'),0, formantpreserve:1.0, useifft:1, ampmult:MouseX.kr(0.0,10.0));
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Out.ar(0,output);
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}.play
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)
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/////////////////////////////////////////////////////////////
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//drawing out sine trails
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b.free
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//buffer for getting data back from UGen
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b=Buffer.alloc(s,100*5*2+514,1)
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//sine reconstruction left channel, noises on right
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(
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{
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var in, fft, output;
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in= SoundIn.ar(0);
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output=SMS.ar(in, 100,100, 8, 0.05, useifft:1, graphicsbufnum: b.bufnum); //or freqmult: MouseX.kr(0.5,4)
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output
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}.play
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)
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//get data back to language
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b.getn(0,1514,{|val| Post << val <<< nl; })
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//
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//frequency is (bin number/512.0) * pi
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//1500*172 would be 258000 floats per second passed!
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//plot sines (512) only (not plotting noise for now but could do as (128 bands))
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(
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var data, basedata, updatedata, paintdata;
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var xperframe= 3; //5 values
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var fps= 172; //172;
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var drawaccum=8; //to avoid too much redraw, accumulate this number of FFT frames worth of data, then plot; 8 is good compromise
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var updatesperwindow= 40; //22;
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var frameperwindow = drawaccum*updatesperwindow; //176//must be divisible by drawaccum //fps = about 172 = 44100/256
|
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var windowx = xperframe*frameperwindow;
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var windowy=640;
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var freqconvert= (512.0/pi); //(44100/1024.0)* // unit->m_nover2/pi
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var freq1, freq2, amp1, amp2, freq, amp;
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var temp;
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var black, white;
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var counter=0; //for scrolling around
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var userview;
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var drawdataready=false, drawpos=0;
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var i, t;
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//var drawupdate = drawaccum/
|
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var bufferfetchwait = (1.0/172.0);
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var drawupdatex = drawaccum*xperframe;
|
||
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||
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black= Integer.fromColor(Color.black);
|
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white= Integer.fromColor(Color.white);
|
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data= Array.fill(windowx*640);
|
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basedata= Int32Array.fill(drawupdatex*windowy,{black});
|
||
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|
||
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updatedata=basedata.copy;
|
||
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|
||
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i = SCImage.new(windowx@windowy);
|
||
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|
||
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w = SCWindow.new("SCImage", Rect(0, 100, windowx+10, windowy+10)).front;
|
||
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w.onClose_({ t.stop; i.free; }); // free the image when the window is closed
|
||
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|
||
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userview = SCUserView(w, w.view.bounds)
|
||
|
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.relativeOrigin_(false)
|
||
|
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//.focusColor_(Color.white.alpha_(0))
|
||
|
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//.resize_(5)
|
||
|
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.backgroundImage_(i) //, 10
|
||
|
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.drawFunc_({arg view;
|
||
|
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//image.drawInRect(view.bounds, image.bounds, 2, 1.0);
|
||
|
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//userview.refreshInRect(Rect(10+(counter*drawupdatex),10,drawupdatex,windowy));
|
||
|
|
|
||
|
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i.drawInRect(Rect(10+(counter*xperframe),10,drawupdatex,windowy),Rect(counter*xperframe,0,drawupdatex,windowy), 2, 1.0);
|
||
|
|
});
|
||
|
|
|
||
|
|
t= {
|
||
|
|
|
||
|
|
inf.do {
|
||
|
|
|
||
|
|
b.getn(0,1514,{|val|
|
||
|
|
|
||
|
|
var number = val[0].round(1.0).asInteger;
|
||
|
|
var drawshift= drawpos*xperframe;
|
||
|
|
//number.postln;
|
||
|
|
|
||
|
|
//updatedata=basedata.copy;
|
||
|
|
|
||
|
|
if(drawpos<drawaccum, {
|
||
|
|
|
||
|
|
number.do{|i|
|
||
|
|
|
||
|
|
var pos= 1+(5*i); //5 values
|
||
|
|
|
||
|
|
//freq1, freq2, amp1, amp2, phase
|
||
|
|
freq1 = (freqconvert*val[pos]); //.round(1.0).asInteger.min(511);
|
||
|
|
freq2 = (freqconvert*val[pos+1]); //.round(1.0).asInteger.min(511);
|
||
|
|
|
||
|
|
//freq1 = freqconvert*val[pos];
|
||
|
|
freq= (freq1+freq2)*0.5;
|
||
|
|
|
||
|
|
//warping
|
||
|
|
//freq= ((((freq1+freq2)*0.5)/511.0)**0.25)*511.0;
|
||
|
|
|
||
|
|
//[\freq1, freq1, \original, val[pos]].postln;
|
||
|
|
freq= 511-((freq).round(1.0).asInteger.min(511));
|
||
|
|
amp= (((val[pos+2] + val[pos+3])*0.5)*1024).min(1.0);
|
||
|
|
|
||
|
|
//[\freq, freq, \amp, amp].postln;
|
||
|
|
|
||
|
|
//goes across by rows then columns down page
|
||
|
|
//i*windowy+freq1
|
||
|
|
//(i*windowy+freq1).post; " ".post;
|
||
|
|
//Integer.fromColor(Color.white);
|
||
|
|
//was = white
|
||
|
|
xperframe.do{|i| updatedata[drawshift+i+(freq*drawupdatex)]= Integer.fromColor(Color.green(amp));};
|
||
|
|
|
||
|
|
//" ".postln;
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
drawpos=drawpos+1;
|
||
|
|
|
||
|
|
if(drawpos==drawaccum,{drawdataready= true;});
|
||
|
|
|
||
|
|
});
|
||
|
|
|
||
|
|
if(drawdataready,{
|
||
|
|
|
||
|
|
drawdataready=false;
|
||
|
|
|
||
|
|
paintdata= updatedata.copy;
|
||
|
|
|
||
|
|
updatedata = basedata.copy;
|
||
|
|
|
||
|
|
drawpos=0;
|
||
|
|
|
||
|
|
{
|
||
|
|
|
||
|
|
counter=(counter+drawaccum)%frameperwindow;
|
||
|
|
|
||
|
|
i.setPixels(
|
||
|
|
paintdata,
|
||
|
|
Rect(counter*xperframe,0,drawupdatex,windowy)
|
||
|
|
);
|
||
|
|
|
||
|
|
//drawupdatex
|
||
|
|
//w.refresh
|
||
|
|
userview.refreshInRect(Rect(10+(counter*xperframe),10,drawupdatex,windowy));
|
||
|
|
|
||
|
|
//i.drawInRect(Rect(10+(counter*xperframe),10,xperframe,windowy), Rect(counter*xperframe,0,xperframe,windowy), 2, 1.0); // only a section
|
||
|
|
}.defer;
|
||
|
|
|
||
|
|
|
||
|
|
});
|
||
|
|
|
||
|
|
|
||
|
|
});
|
||
|
|
|
||
|
|
bufferfetchwait.wait;
|
||
|
|
}
|
||
|
|
|
||
|
|
}.fork;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
)</textarea>
|
||
|
|
|
||
|
|
<p><div class='doclink'>helpfile source: <a href='file:///Users/zzk/Library/Application Support/SuperCollider/Extensions/SC3plugins/NCAnalysisUGens/HelpSource/Classes/SMS.schelp'>/Users/zzk/Library/Application Support/SuperCollider/Extensions/SC3plugins/NCAnalysisUGens/HelpSource/Classes/SMS.schelp</a><br>link::Classes/SMS::<br></div></div><script src='./../editor.js' type='text/javascript'></script>
|
||
|
|
</body></html>
|