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<h2>
<span class="refentrytitle">minabs</span>
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<p>minabs —
Produces a signal that is the minimum of the absolute values of any number of input signals.
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<div class="refsect1" title="Description">
<a id="idp31593432"></a>
<h2>Description</h2>
<p>
The <span class="emphasis"><em>minabs</em></span> opcode takes any number of a-rate or k-rate signals as input (all of the same rate), and outputs a signal at the same rate that is the minimum of all of the inputs. It is identical to the <span class="emphasis"><em>min</em></span> opcode except that it takes the absolute value of each input before comparing them. Therefore, the output is always non-negative. For a-rate signals, the inputs are compared one sample at a time (i.e. <span class="emphasis"><em>minabs</em></span> does not scan an entire ksmps period of a signal for its local minimum as the <span class="emphasis"><em>max_k</em></span> opcode does).
</p>
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<div class="refsect1" title="Syntax">
<a id="idp31604784"></a>
<h2>Syntax</h2>
<pre class="synopsis">amin <span class="command"><strong>minabs</strong></span> ain1, ain2 [, ain3] [, ain4] [...]</pre>
<pre class="synopsis">kmin <span class="command"><strong>minabs</strong></span> kin1, kin2 [, kin3] [, kin4] [...]</pre>
</div>
<div class="refsect1" title="Performance">
<a id="idp31606656"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>ain1, ain2, ...</em></span> -- a-rate signals to be compared.
</p>
<p>
<span class="emphasis"><em>kin1, kin2, ...</em></span> -- k-rate signals to be compared.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp31607872"></a>
<h2>Examples</h2>
<p>
Here is an example of the minabs opcode. It uses the file <a class="ulink" href="examples/minabs.csd" target="_top"><em class="citetitle">minabs.csd</em></a>.
</p>
<div class="example">
<a id="idp31641768"></a>
<p class="title">
<strong>Example 476. Example of the minabs 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 minabs.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
k1 <span class="opc">oscili</span> 1, 10.0, 1 <span class="comment">;combine 3 sinusses</span>
k2 <span class="opc">oscili</span> 1, 1.0, 1 <span class="comment">;at different rates</span>
k3 <span class="opc">oscili</span> 1, 3.0, 1
kmin <span class="opc">minabs</span> k1, k2, k3
kmin <span class="op">=</span> kmin<span class="op">*</span>250 <span class="comment">;scale kmin</span>
<span class="opc">printk2</span> kmin <span class="comment">;check the values</span>
aout <span class="opc">vco2</span> .5, 220, 6 <span class="comment">;sawtooth</span>
asig <span class="opc">moogvcf2</span> aout, 600<span class="op">+</span>kmin, .5 <span class="comment">;change filter above 600 Hz </span>
<span class="opc">outs</span> asig, asig
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">f</span>1 0 32768 10 1
<span class="stamnt">i</span>1 0 5
<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="idp31644040"></a>
<h2>See Also</h2>
<p>
<a class="link" href="maxabs.html" title="maxabs"><em class="citetitle">maxabs</em></a>,
<a class="link" href="max.html" title="max"><em class="citetitle">max</em></a>,
<a class="link" href="min.html" title="min"><em class="citetitle">min</em></a>,
<a class="link" href="maxaccum.html" title="maxaccum"><em class="citetitle">maxaccum</em></a>,
<a class="link" href="minaccum.html" title="minaccum"><em class="citetitle">minaccum</em></a>,
<a class="link" href="maxabsaccum.html" title="maxabsaccum"><em class="citetitle">maxabsaccum</em></a>,
<a class="link" href="minabsaccum.html" title="minabsaccum"><em class="citetitle">minabsaccum</em></a>,
<a class="link" href="max_k.html" title="max_k"><em class="citetitle">max_k</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp31648352"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Anthony Kozar</td>
</tr>
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<td>March 2006</td>
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<p>
</p>
<p>New in Csound version 5.01</p>
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