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<div id='toctitle'>LPF:</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> <a href='#*kr'>kr</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>
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<span id='folder'>Classes</span>
| <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>
</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>
</h1>
<div id='summary'>2nd order Butterworth lowpass filter</div>
</div>
<div class='subheader'>
<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>
<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>
</div>
<h2><a class='anchor' name='description'>Description</a></h2>
<p>A second order low pass filter.<h2><a class='anchor' name='classmethods'>Class Methods</a></h2>
<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>
<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>
<div class='method'>
<p><h4>Arguments:</h4>
<table class='arguments'>
<tr><td class='argumentname'>in<td class='argumentdesc'>
<p>The input signal.<tr><td class='argumentname'>freq<td class='argumentdesc'>
<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'>
<p>Output will be multiplied by this value.<tr><td class='argumentname'>add<td class='argumentdesc'>
<p>This value will be added to the output.</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'>{ LPF.ar(Saw.ar(200,0.1), SinOsc.kr(XLine.kr(0.7,300,20),0,3600,4000)) }.play;
// kr:
(
{ var ctl = LPF.kr(LFPulse.kr(8), SinOsc.kr(XLine.kr(1, 30, 5)) + 2);
SinOsc.ar(ctl * 200 + 400)
}.play;
)
(
{ var ctl = LPF.kr(LFPulse.kr(8), MouseX.kr(2, 50, 1));
SinOsc.ar(ctl * 200 + 400)
}.play;
)</textarea>
<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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