76 lines
5.3 KiB
HTML
76 lines
5.3 KiB
HTML
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<!doctype html><html lang='en'><head><title>LPF | SuperCollider 3.10.2 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 = 'LPF';
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var scdoc_sc_version = '3.10.2';
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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'>LPF:</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> <a href='#*kr'>kr</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</span>
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| <span id='categories'><a href='./../Browse.html#UGens'>UGens</a> > <a href='./../Browse.html#UGens>Filters'>Filters</a> > <a href='./../Browse.html#UGens>Filters>Linear'>Linear</a></span>
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</div><h1>LPF<span id='superclasses'> : <a href="../Classes/Filter.html">Filter</a> : <a href="../Classes/PureUGen.html">PureUGen</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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</h1>
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<div id='summary'>2nd order Butterworth lowpass filter</div>
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</div>
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<div class='subheader'>
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<div id='filename'>Source: <a href='file:///Applications/SuperCollider.app/Contents/Resources/SCClassLibrary/Common/Audio/Filter.sc' title='/Applications/SuperCollider.app/Contents/Resources/SCClassLibrary/Common/Audio/Filter.sc'>Filter.sc</a></div><div id='subclasses'>Subclasses: <a href="../Classes/HPF.html">HPF</a></div>
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<div id='related'>See also: <a href="./../Classes/BPF.html">BPF</a>, <a href="./../Classes/BRF.html">BRF</a>, <a href="./../Classes/HPF.html">HPF</a></div>
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</div>
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<h2><a class='anchor' name='description'>Description</a></h2>
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<p>A second order low pass filter.<h2><a class='anchor' name='classmethods'>Class Methods</a></h2>
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<h3 class='method-code'><span class='method-prefix'>LPF.</span><a class='method-name' name='*ar' href='./../Overviews/Methods.html#ar'>ar</a>(<span class='argstr'>in: 0.0</span>, <span class='argstr'>freq: 440.0</span>, <span class='argstr'>mul: 1.0</span>, <span class='argstr'>add: 0.0</span>)</h3>
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<h3 class='method-code'><span class='method-prefix'>LPF.</span><a class='method-name' name='*kr' href='./../Overviews/Methods.html#kr'>kr</a>(<span class='argstr'>in: 0.0</span>, <span class='argstr'>freq: 440.0</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'>in<td class='argumentdesc'>
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<p>The input signal.<tr><td class='argumentname'>freq<td class='argumentdesc'>
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<p>Cutoff frequency in Hertz. WARNING: due to the nature of its implementation frequency values close to 0 may cause glitches and/or extremely loud audio artifacts!<tr><td class='argumentname'>mul<td class='argumentdesc'>
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<p>Output will be multiplied by this value.<tr><td class='argumentname'>add<td class='argumentdesc'>
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<p>This value will be added to the output.</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'>{ LPF.ar(Saw.ar(200,0.1), SinOsc.kr(XLine.kr(0.7,300,20),0,3600,4000)) }.play;
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// kr:
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(
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{ var ctl = LPF.kr(LFPulse.kr(8), SinOsc.kr(XLine.kr(1, 30, 5)) + 2);
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SinOsc.ar(ctl * 200 + 400)
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}.play;
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)
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(
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{ var ctl = LPF.kr(LFPulse.kr(8), MouseX.kr(2, 50, 1));
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SinOsc.ar(ctl * 200 + 400)
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}.play;
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)</textarea>
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<div class='doclink'>helpfile source: <a href='file:///Applications/SuperCollider.app/Contents/Resources/HelpSource/Classes/LPF.schelp'>/Applications/SuperCollider.app/Contents/Resources/HelpSource/Classes/LPF.schelp</a><br>link::Classes/LPF::<br></div></div><script src='./../editor.js' type='text/javascript'></script>
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</body></html>
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