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<h2>
<span class="refentrytitle">minabs</span>
</h2>
<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">
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<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">
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<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>
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<div class="refsect1">
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<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>
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<div class="refsect1">
<a id="idm281472913595752"></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="idm281472913593976"></a>
<p class="title">
<strong>Example 560. 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>
<div class="refsect1">
<a id="idm281472737795032"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
-odac <span class="c1">;;;realtime audio out</span>
<span class="c1">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o minabs.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">32</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="kd">instr</span> <span class="nf">1</span>
k<span class="n">1</span> <span class="nb">oscili</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">10.0</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">;combine 3 sinusses</span>
k<span class="n">2</span> <span class="nb">oscili</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">1.0</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">;at different rates</span>
k<span class="n">3</span> <span class="nb">oscili</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">3.0</span><span class="p">,</span> <span class="mi">1</span>
k<span class="n">min</span> <span class="nb">minabs</span> k<span class="n">1</span><span class="p">,</span> k<span class="n">2</span><span class="p">,</span> k<span class="n">3</span>
k<span class="n">min</span> <span class="o">=</span> k<span class="n">min</span><span class="o">*</span><span class="mi">250</span> <span class="c1">;scale kmin</span>
<span class="nb">printk2</span> k<span class="n">min</span> <span class="c1">;check the values</span>
a<span class="n">out</span> <span class="nb">vco2</span> <span class="mf">.5</span><span class="p">,</span> <span class="mi">220</span><span class="p">,</span> <span class="mi">6</span> <span class="c1">;sawtooth</span>
a<span class="n">sig</span> <span class="nb">moogvcf2</span> a<span class="n">out</span><span class="p">,</span> <span class="mi">600</span><span class="o">+</span>k<span class="n">min</span><span class="p">,</span> <span class="mf">.5</span> <span class="c1">;change filter above 600 Hz </span>
<span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">f</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">32768</span> <span class="mi">10</span> <span class="mi">1</span>
<span class="nb">i</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">5</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1">
<a id="idm281472913589688"></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>
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<div class="refsect1">
<a id="idm281472913581048"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Anthony Kozar</td>
</tr>
<tr>
<td>March 2006</td>
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<p>
</p>
<p>New in Csound version 5.01</p>
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