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<h2>
<span class="refentrytitle">gainslider</span>
</h2>
<p>gainslider —
An implementation of a logarithmic gain curve which is similar to the gainslider~ object from Cycling 74 Max / MSP.
</p>
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<div class="refsect1" title="Description">
<a id="idp24984632"></a>
<h2>Description</h2>
<p>
This opcode is intended for use to multiply by an audio signal to give a console mixer like feel. There is no bounds in the
source code so you can for example give higher than 127 values for extra amplitude but possibly clipped audio.
</p>
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<div class="refsect1" title="Syntax">
<a id="idp24985248"></a>
<h2>Syntax</h2>
<pre class="synopsis">kout <span class="command"><strong>gainslider</strong></span> kindex</pre>
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<div class="refsect1" title="Performance">
<a id="idp24996264"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kindex</em></span> -- Index value. Nominal range from 0-127. For example a range of 0-152 will give you a range from -∞ to +18.0 dB.
</p>
<p>
<span class="emphasis"><em>kout</em></span> -- Scaled output.
</p>
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<div class="refsect1" title="Examples">
<a id="idp24997760"></a>
<h2>Examples</h2>
<p>
Here is an example of the gainslider opcode. It uses the file <a class="ulink" href="examples/gainslider.csd" target="_top"><em class="citetitle">gainslider.csd</em></a>.
</p>
<div class="example">
<a id="idp24998760"></a>
<p class="title">
<strong>Example 315. Example of the gainslider 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>
<span class="comment">; Audio out Audio in Silent</span>
-odac -iadc -d <span class="comment">;;;realtime output</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 48000
<span class="ohdr">ksmps</span> <span class="op">=</span> 100
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="oblock">instr</span> 1 <span class="comment">; gainslider test</span>
<span class="comment">; uncomment for realtime midi</span>
<span class="comment">;kmod ctrl7 1, 1, 0, 127</span>
<span class="comment">; uncomment for non realtime</span>
km0d <span class="opc">phasor</span> 1<span class="op">/</span>10
kmod <span class="opc">scale</span> km0d, 127, 0
kout <span class="opc">gainslider</span> kmod
<span class="opc">printks</span> "kmod <span class="op">=</span> <span class="op">%</span>f kout <span class="op">=</span> <span class="op">%</span>f\\n", 0.1, kmod, kout
aout <span class="opc">diskin2</span> "fox.wav", 1, 0, 1
aout <span class="op">=</span> aout<span class="op">*</span>kout
<span class="opc">outs</span> aout, aout
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span>1 0 30
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1" title="See Also">
<a id="idp25001088"></a>
<h2>See Also</h2>
<p>
<a class="link" href="scale.html" title="scale"><em class="citetitle">scale</em></a>,
<a class="link" href="logcurve.html" title="logcurve"><em class="citetitle">logcurve</em></a>,
<a class="link" href="expcurve.html" title="expcurve"><em class="citetitle">expcurve</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp25031024"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: David Akbari</td>
</tr>
<tr>
<td>October</td>
</tr>
<tr>
<td>2006</td>
</tr>
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<p>
</p>
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