61 lines
5 KiB
HTML
61 lines
5 KiB
HTML
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<!doctype html><html lang='en'><head><title>FSinOsc | SuperCollider 3.9.3 Help</title>
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<link rel='stylesheet' href='./../scdoc.css' type='text/css' />
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<link rel='stylesheet' href='./../custom.css' type='text/css' />
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<meta http-equiv='Content-Type' content='text/html; charset=UTF-8' />
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<script>
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var helpRoot = './..';
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var scdoc_title = 'FSinOsc';
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var scdoc_sc_version = '3.9.3';
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</script>
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<script src='./../scdoc.js' type='text/javascript'></script>
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</head>
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<body onload='fixTOC();prettyPrint()'>
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<div id='toc'>
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<div id='toctitle'>FSinOsc:</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 class='contents'>
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<div id='menubar'></div>
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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>Generators'>Generators</a> > <a href='./../Browse.html#UGens>Generators>Deterministic'>Deterministic</a></span>
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</div><h1>FSinOsc<span id='superclasses'> : <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'>Fast sine oscillator.</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/FSinOsc.sc' title='/Applications/SuperCollider.app/Contents/Resources/SCClassLibrary/Common/Audio/FSinOsc.sc'>FSinOsc.sc</a></div><div id='related'>See also: <a href="./../Classes/SinOsc.html">SinOsc</a>, <a href="./../Classes/SinOscFB.html">SinOscFB</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>Very fast sine wave generator (2 PowerPC instructions per output sample!) implemented using a ringing filter. This generates a much cleaner sine wave than a table lookup oscillator and is a lot faster. However, the amplitude of the wave will vary with frequency. Generally the amplitude will go down as you raise the frequency and go up as you lower the frequency.<div class='warning'><span class='warninglabel'>WARNING:</span> In the current implementation, the amplitude can blow up if the frequency is modulated by certain alternating signals.</div><h2><a class='anchor' name='classmethods'>Class Methods</a></h2>
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<h3 class='method-code'><span class='method-prefix'>FSinOsc.</span><a class='method-name' name='*ar' href='./../Overviews/Methods.html#ar'>ar</a>(<span class='argstr'>freq: 440</span>, <span class='argstr'>iphase: 0</span>, <span class='argstr'>mul: 1</span>, <span class='argstr'>add: 0</span>)</h3>
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<h3 class='method-code'><span class='method-prefix'>FSinOsc.</span><a class='method-name' name='*kr' href='./../Overviews/Methods.html#kr'>kr</a>(<span class='argstr'>freq: 440</span>, <span class='argstr'>iphase: 0</span>, <span class='argstr'>mul: 1</span>, <span class='argstr'>add: 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'>freq<td class='argumentdesc'>
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<p>Frequency in Hertz.<tr><td class='argumentname'>iphase<td class='argumentdesc'>
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<p>Initial phase offset.<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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<pre class='code prettyprint lang-sc'>{ FSinOsc.ar(800) * 0.2 }.play;
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{ FSinOsc.ar(XLine.kr(200, 4000, 1)) * 0.2 }.play;
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// loses amplitude towards the end
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{ FSinOsc.ar(FSinOsc.ar(XLine.kr(4, 401, 8), 0.0, 200, 800)) * 0.2 }.play;</pre>
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<div class='doclink'>helpfile source: <a href='file:///Applications/SuperCollider.app/Contents/Resources/HelpSource/Classes/FSinOsc.schelp'>/Applications/SuperCollider.app/Contents/Resources/HelpSource/Classes/FSinOsc.schelp</a><br>link::Classes/FSinOsc::<br></div></div></body></html>
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