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2022-08-24 13:53:18 +00:00
<!doctype html><html lang='en'><head><title>SMS | SuperCollider 3.12.2 Help</title>
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<div id='toc'>
<div id='toctitle'>SMS:</div>
<span class='toc_search'>Filter: <input id='toc_search'></span><ul class='toc'><li class='toc1'><a href='#description'>Description</a></li>
<ul class='toc'></ul><li class='toc1'><a href='#classmethods'>Class methods</a></li>
<ul class='toc'><li class='toc3'><a href='#*ar'>ar</a> </li>
<li class='toc2'><a href='#Inherited%20class%20methods'>Inherited class methods</a></li>
</ul><li class='toc1'><a href='#instancemethods'>Instance methods</a></li>
<ul class='toc'><li class='toc2'><a href='#Inherited%20instance%20methods'>Inherited instance methods</a></li>
</ul><li class='toc1'><a href='#examples'>Examples</a></li>
<ul class='toc'></ul></ul></div><div id='menubar'></div>
<div class='contents'>
<div class='header'>
<div id='label'>
<span id='folder'>Classes (extension)</span>
| <span id='categories'><a href='./../Browse.html#UGens'>UGens</a>&#8201;&gt;&#8201;<a href='./../Browse.html#UGens>Analysis'>Analysis</a></span>
</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>
<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>
<div id='summary'>Spectral Modeling Synthesis</div>
</div>
<div class='subheader'>
<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>
<h2><a class='anchor' name='description'>Description</a></h2>
<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.
<p>For technical details see:
<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>
<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>
<div class='method'>
<p><h4>Arguments:</h4>
<table class='arguments'>
<tr><td class='argumentname'>input<td class='argumentdesc'>
<p>Audio rate input to be analysed<tr><td class='argumentname'>maxpeaks<td class='argumentdesc'>
<p>Absolute maximum number of allowed peaks to be detected in the spectrum<tr><td class='argumentname'>currentpeaks<td class='argumentdesc'>
<p>Current number of allowed peaks to be detected in the spectrum<tr><td class='argumentname'>tolerance<td class='argumentdesc'>
<p>Search area for matching peaks; within tolerance spectral bins<tr><td class='argumentname'>noisefloor<td class='argumentdesc'>
<p>Minimum magnitude for a candidate peak (measured as spectral magnitude)<tr><td class='argumentname'>freqmult<td class='argumentdesc'>
<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'>
<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'>
<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'>
<p>Use IFFT based resynthesis, which is lower quality, but substantially more efficient<tr><td class='argumentname'>ampmult<td class='argumentdesc'>
<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'>
<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>
<div id='inheritedclassmets'></div><h2><a class='anchor' name='instancemethods'>Instance Methods</a></h2>
<h3><a class='anchor' name='Inherited%20instance%20methods'>Inherited instance methods</a></h3>
<div id='inheritedinstmets'></div><h2><a class='anchor' name='examples'>Examples</a></h2>
<textarea class='editor'>//sine reconstruction left channel, noises on right
(
{
var in, fft, output;
in= SoundIn.ar(0);
output=SMS.ar(in, 50,MouseY.kr(1,50), 8, 0.3); //or freqmult: MouseX.kr(0.5,4)
output
}.play
)
//sum reconstruction channels to simulate effect of straight through
(
{
var in, fft, output;
in= SoundIn.ar(0);
output=SMS.ar(in, 50,MouseY.kr(1,50), 8, 0.3); //or freqmult: MouseX.kr(0.5,4)
output.sum.dup
}.play
)
//just noise residual
d=Buffer.read(s,Platform.resourceDir +/+ "sounds/a11wlk01.wav");
(
{
var in, fft, output;
in=PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
output=SMS.ar(in, 50,50, MouseX.kr(1.0,10.0).round(1.0),MouseY.kr(0.1,20.0,'exponential'), 1.0);
Out.ar(0,Pan2.ar(output[1]));
}.play
)
//frequency multiplication and shift with formant preservation
(
{
var in, fft, output;
in=PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
output=SMS.ar(in, 60,60, 4.0,0.2, MouseX.kr(0.5,4), MouseY.kr(0,1000), 1.0);
Out.ar(0,Pan2.ar(output[0]));
}.play
)
//transient detection via Pitch hasFreq output
//could have freq input and transient detection input to SMS to control rendering
(
{
var in, fft, sines, noise, freq, hasFreq;
//in= SoundIn.ar(0);
in=PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
#freq, hasFreq= Pitch.kr(in);
#sines, noise=SMS.ar(in, 50,50, 8, 1.0, MouseX.kr(0.5,4));
Pan2.ar(sines*(hasFreq.lag(0.01,0.01)) + LPF.ar(noise,MouseY.kr(100,10000,'exponential')),0.0)
}.play
)
//alternative; only pass into SMS if not a transient region
(
{
var in, fft, sines, noise, freq, hasFreq;
//in= SoundIn.ar(0);
in=PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
#freq, hasFreq= Pitch.kr(in);
#sines, noise=SMS.ar(if(hasFreq,in, Silent.ar), 50,50, 8, 1.0, MouseX.kr(0.5,4));
if(hasFreq,Pan2.ar(sines + LPF.ar(noise,MouseY.kr(100,10000,'exponential')), 0.0),0.25*in)
}.play
)
//having fun
(
{
var in, fft, output;
in=PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
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));
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));
}.play
)
//having even more fun
(
{
var in, fft, output;
in=SoundIn.ar(0);
output=SMS.ar(in, 60,60, 4.0,0.1, MouseX.kr(0.01,10), MouseY.kr(-1000,1000), 0.0);
Out.ar(0,Pan2.ar(CombL.ar(output[1],0.02,0.02,0.5) + output[0]));
}.play
)
//testing IFFT resynthesis
(
{
var in, fft, output;
in=PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
output=SMS.ar(in, 300,MouseY.kr(1,300), 10.0,0.01, MouseX.kr(0.5,4), 0, 1.0, 1);
Out.ar(0,output);
}.play
)
//just sines
(
{
var in, fft, output;
in=PlayBuf.ar(1,d,BufRateScale.kr(d),1,0,1);
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);
Out.ar(0,Pan2.ar(output[0]));
}.play
)
//having even more fun, this time with IFFT
(
{
var in, fft, output;
in=SoundIn.ar(0);
output=SMS.ar(in, 200,200, 4.0,0.1, MouseX.kr(0.01,10), MouseY.kr(-1000,1000), 0.0, useifft:1);
Out.ar(0,Pan2.ar(CombL.ar(output[1],0.02,0.02,0.5) + output[0]));
}.play
)
//experimenting with ampmult
(
{
var in, fft, output;
in=SoundIn.ar(0);
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));
Out.ar(0,output);
}.play
)
/////////////////////////////////////////////////////////////
//drawing out sine trails
b.free
//buffer for getting data back from UGen
b=Buffer.alloc(s,100*5*2+514,1)
//sine reconstruction left channel, noises on right
(
{
var in, fft, output;
in= SoundIn.ar(0);
output=SMS.ar(in, 100,100, 8, 0.05, useifft:1, graphicsbufnum: b.bufnum); //or freqmult: MouseX.kr(0.5,4)
output
}.play
)
//get data back to language
b.getn(0,1514,{|val| Post &lt;&lt; val &lt;&lt;&lt; nl; })
//
//frequency is (bin number/512.0) * pi
//1500*172 would be 258000 floats per second passed!
//plot sines (512) only (not plotting noise for now but could do as (128 bands))
(
var data, basedata, updatedata, paintdata;
var xperframe= 3; //5 values
var fps= 172; //172;
var drawaccum=8; //to avoid too much redraw, accumulate this number of FFT frames worth of data, then plot; 8 is good compromise
var updatesperwindow= 40; //22;
var frameperwindow = drawaccum*updatesperwindow; //176//must be divisible by drawaccum //fps = about 172 = 44100/256
var windowx = xperframe*frameperwindow;
var windowy=640;
var freqconvert= (512.0/pi); //(44100/1024.0)* // unit-&gt;m_nover2/pi
var freq1, freq2, amp1, amp2, freq, amp;
var temp;
var black, white;
var counter=0; //for scrolling around
var userview;
var drawdataready=false, drawpos=0;
var i, t;
//var drawupdate = drawaccum/
var bufferfetchwait = (1.0/172.0);
var drawupdatex = drawaccum*xperframe;
black= Integer.fromColor(Color.black);
white= Integer.fromColor(Color.white);
data= Array.fill(windowx*640);
basedata= Int32Array.fill(drawupdatex*windowy,{black});
updatedata=basedata.copy;
i = SCImage.new(windowx@windowy);
w = SCWindow.new("SCImage", Rect(0, 100, windowx+10, windowy+10)).front;
w.onClose_({ t.stop; i.free; }); // free the image when the window is closed
userview = SCUserView(w, w.view.bounds)
.relativeOrigin_(false)
//.focusColor_(Color.white.alpha_(0))
//.resize_(5)
.backgroundImage_(i) //, 10
.drawFunc_({arg view;
//image.drawInRect(view.bounds, image.bounds, 2, 1.0);
//userview.refreshInRect(Rect(10+(counter*drawupdatex),10,drawupdatex,windowy));
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&lt;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>
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