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<div class="refentry" title="flanger">
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<h2>
<span class="refentrytitle">flanger</span>
</h2>
<p>flanger —
A user controlled flanger.
</p>
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<div class="refsect1" title="Description">
<a id="idp20318712"></a>
<h2>Description</h2>
<p>
A user controlled flanger.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp20319408"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>flanger</strong></span> asig, adel, kfeedback [, imaxd]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp20372920"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>imaxd</em></span>(optional) -- maximum delay in seconds (needed for inital memory allocation)
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp20373912"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>asig</em></span> -- input signal
</p>
<p>
<span class="emphasis"><em>adel</em></span> -- delay in seconds
</p>
<p>
<span class="emphasis"><em>kfeedback</em></span> -- feedback amount (in normal tasks this should not exceed 1, even if bigger values are allowed)
</p>
<p>
This unit is useful for generating choruses and flangers. The delay must be varied at a-rate connecting <span class="emphasis"><em>adel</em></span> to an oscillator output. Also the feedback can vary at k-rate. This opcode is implemented to allow <span class="emphasis"><em>kr</em></span> different than <span class="emphasis"><em>sr</em></span> (else delay could not be lower than <span class="emphasis"><em>ksmps</em></span>) enhancing realtime performance. This unit is very similar to <a class="link" href="wguide1.html" title="wguide1"><em class="citetitle">wguide1</em></a>, the only difference is <span class="emphasis"><em>flanger</em></span> does not have the lowpass filter.
</p>
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<div class="refsect1" title="Examples">
<a id="idp20378056"></a>
<h2>Examples</h2>
<p>
Here is an example of the flanger opcode. It uses the file <a class="ulink" href="examples/flanger.csd" target="_top"><em class="citetitle">flanger.csd</em></a>.
</p>
<div class="example">
<a id="idp20379040"></a>
<p class="title">
<strong>Example 234. Example of the flanger opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">;-o flanger.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="oblock">instr</span> 1
kfeedback <span class="op">=</span> p4
asnd <span class="opc">vco2</span> .2, 50
adel <span class="opc">linseg</span> 0, p3<span class="op">*</span>.5, 0.02, p3<span class="op">*</span>.5, 0 <span class="comment">;max delay time =20ms </span>
aflg <span class="opc">flanger</span> asnd, adel, kfeedback
asig <span class="opc">clip</span> aflg, 1, 1
<span class="opc">outs</span> asig<span class="op">+</span>asnd, asig<span class="op">+</span>asnd <span class="comment">;mix flanger with original</span>
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span> 1 0 10 .2
<span class="stamnt">i</span> 1 11 10 .8 <span class="comment">;lot of feedback</span>
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
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<p><br class="example-break" />
</p>
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<div class="refsect1" title="See Also">
<a id="idp20381320"></a>
<h2>See Also</h2>
<p> More information on flanging on Wikipedia: <a class="ulink" href="http://en.wikipedia.org/wiki/Flanger" target="_top"><em class="citetitle">http://en.wikipedia.org/wiki/Flanger</em></a></p>
</div>
<div class="refsect1" title="Credits">
<a id="idp20382376"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Gabriel Maldonado</td>
</tr>
<tr>
<td>Italy</td>
</tr>
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<p>
</p>
<p>New in Csound version 3.49</p>
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