<html><head><title>Resonz</title>
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<div id='label'>SuperCollider CLASSES</div>
<div id='categories'><a href='./../Browse.html#UGens>Filters>Linear'>UGens>Filters>Linear</a></div>
<h1>Resonz</h1>
<div id='summary'>Resonant filter.</div>
</div>
<div class='subheader'>
<div id='filename'>Source: <a href='file:///Applications/SuperCollider.app/Contents/Resources/SCClassLibrary/Common/Audio/Filter.sc'>/Applications/SuperCollider.app/Contents/Resources/SCClassLibrary/Common/Audio/Filter.sc</a></div><div id='superclasses'>Inherits from: <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></div>
<div id='related'>See also: <a href="./../Classes/Formlet.html">Formlet</a>, <a href="./../Classes/RHPF.html">RHPF</a>, <a href="./../Classes/RLPF.html">RLPF</a>, <a href="./../Classes/Ringz.html">Ringz</a></div>
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<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>
<ul class='toc'></ul></ul></div><h2><a class='anchor' name='description'>Description</a></h2>
<p>This is the same as <a href="./../Classes/Ringz.html">Ringz</a> , except that it has a constant gain at 0 dB instead of being constant skirt.
<p>It is a two pole resonant filter with zeroes at<pre class='code prettyprint lang-sc'>z = ±1</pre>
<p>Based on <em>K. Steiglitz, "A Note on Constant-Gain Digital Resonators", Computer Music Journal, vol 18, no. 4, pp. 8-10, Winter 1994</em>.<h2><a class='anchor' name='classmethods'>Class Methods</a></h2>
<h3 class='cmethodname'><span class='methprefix'>*</span><a name='*ar' href='./../Overviews/Methods.html#ar'>ar</a> (<span class='argstr'>in: 0</span>, <span class='argstr'>freq: 440</span>, <span class='argstr'>bwr: 1</span>, <span class='argstr'>mul: 1</span>, <span class='argstr'>add: 0</span>)</h3>
<h3 class='cmethodname'><span class='methprefix'>*</span><a name='*kr' href='./../Overviews/Methods.html#kr'>kr</a> (<span class='argstr'>in: 0</span>, <span class='argstr'>freq: 440</span>, <span class='argstr'>bwr: 1</span>, <span class='argstr'>mul: 1</span>, <span class='argstr'>add: 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>Resonant 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'>bwr<td class='argumentdesc'>
<p>Bandwidth ratio (reciprocal of Q). rq = bandwidth / centerFreq.
<p>The reciprocal of Q is used rather than Q because it saves a divide operation inside the unit generator.<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>
<pre class='code prettyprint lang-sc'>{ Resonz.ar(WhiteNoise.ar(0.5), 2000, 0.1) }.play
// modulate frequency
{ Resonz.ar(WhiteNoise.ar(0.5), XLine.kr(1000,8000,10), 0.05) }.play
// modulate bandwidth
{ Resonz.ar(WhiteNoise.ar(0.5), 2000, XLine.kr(1, 0.001, 8)) }.play
// modulate bandwidth opposite direction
{ Resonz.ar(WhiteNoise.ar(0.5), 2000, XLine.kr(0.001, 1, 8)) }.play</pre>
<div class='doclink'>helpfile source: <a href='file:///Applications/SuperCollider.app/Contents/Resources/HelpSource/Classes/Resonz.schelp'>/Applications/SuperCollider.app/Contents/Resources/HelpSource/Classes/Resonz.schelp</a><br>link::Classes/Resonz::<br>sc version: 3.8.0</div></div></body></html>