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<h2>
<span class="refentrytitle">outch</span>
</h2>
<p>outch —
Writes multi-channel audio data, with user-controllable channels, to an external device or stream.
</p>
</div>
<div class="refsect1">
<a id="idm281472908156504"></a>
<h2>Description</h2>
<p>
Writes multi-channel audio data, with user-controllable channels, to an external device or stream.
</p>
</div>
<div class="refsect1">
<a id="idm281472908092296"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>outch</strong></span> kchan1, asig1 [, kchan2] [, asig2] [...]</pre>
</div>
<div class="refsect1">
<a id="idm281472908090280"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>outch</em></span> outputs <span class="emphasis"><em>asig1</em></span> on the channel determined by <span class="emphasis"><em>kchan1</em></span>, <span class="emphasis"><em>asig2</em></span> on the channel determined by <span class="emphasis"><em>kchan2</em></span>, etc.
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<table border="0" summary="Note">
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<td rowspan="2" align="center" valign="top" width="25">
<img alt="[Note]" src="images/note.png" />
</td>
<th align="left">Note</th>
</tr>
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<td align="left" valign="top">
<p>
The highest number for <span class="emphasis"><em>kchanX</em></span> available for use with <span class="emphasis"><em>outch</em></span> depends on <a class="link" href="nchnls.html" title="nchnls"><em class="citetitle">nchnls</em></a>. If <span class="emphasis"><em>kchanX</em></span> is greater than <span class="emphasis"><em>nchnls</em></span>, <span class="emphasis"><em>asigX</em></span> will be silent. Note that <span class="emphasis"><em>outch</em></span> will give a warning but not an error in this case.
</p>
</td>
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<div class="refsect1">
<a id="idm281472908082424"></a>
<h2>Examples</h2>
<p>
Here is an example of the outch opcode. It uses the file <a class="ulink" href="examples/outch.csd" target="_top"><em class="citetitle">outch.csd</em></a>.
</p>
<div class="example">
<a id="idm281472908080568"></a>
<p class="title">
<strong>Example 634. Example of the outch 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="idm281472731025976"></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 outch.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">5</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>
a<span class="n">sig</span> <span class="nb">vco2</span> <span class="mf">.05</span><span class="p">,</span> <span class="mi">100</span> <span class="c1">; sawtooth waveform at low volume</span>
k<span class="n">cut</span> <span class="nb">line</span> <span class="mi">100</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">30</span> <span class="c1">; Vary cutoff frequency</span>
k<span class="n">resonance</span> <span class="o">=</span> <span class="mf">.7</span>
i<span class="n">numlayer</span> <span class="o">=</span> <span class="mi">3</span>
a<span class="n">sig</span> <span class="nb">lowresx</span> a<span class="n">sig</span><span class="p">,</span> k<span class="n">cut</span><span class="p">,</span> k<span class="n">resonance</span><span class="p">,</span> i<span class="n">numlayer</span>
k<span class="n">lfo</span> <span class="nb">lfo</span> <span class="mi">4</span><span class="p">,</span> <span class="mf">.5</span><span class="p">,</span> <span class="mi">4</span>
k<span class="n">lfo</span> <span class="o">=</span> k<span class="n">lfo</span><span class="o">+</span><span class="mi">1</span> <span class="c1">; offset of 1</span>
<span class="nb">printks</span> <span class="s">"signal is sent to channel </span><span class="si">%d</span><span class="se">\\</span><span class="s">n"</span><span class="p">,</span> <span class="mf">.1</span><span class="p">,</span> k<span class="n">lfo</span>
<span class="nb">outch</span> k<span class="n">lfo</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">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">30</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
</p>
<pre class="screen">
signal is sent to channel 5
signal is sent to channel 4
signal is sent to channel 3
signal is sent to channel 2
signal is sent to channel 1
signal is sent to channel 5
........
</pre>
<p>
</p>
<p>
Here is another example of the outch opcode. It uses the file <a class="ulink" href="examples/outch.csd" target="_top"><em class="citetitle">outch-2.csd</em></a>.
</p>
<div class="example">
<a id="idm281472908074520"></a>
<p class="title">
<strong>Example 635. Another example of the outch opcode.</strong>
</p>
<div class="example-contents">
<div class="refsect1">
<a id="idm281472730985992"></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 outch-2.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">4</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="nb">seed</span> <span class="mi">0</span>
<span class="kd">instr</span> <span class="nf">1</span> <span class="c1">;random movements between 4 speakers with outch</span>
i<span class="n">chn1</span> <span class="nb">random</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">4.999</span> <span class="c1">;channel to start</span>
i<span class="n">chn2</span> <span class="nb">random</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">4.999</span> <span class="c1">;channel to end</span>
<span class="nb">prints</span> <span class="s">"Moving from speaker </span><span class="si">%d</span><span class="s"> to speaker </span><span class="si">%d</span><span class="se">%n</span><span class="s">"</span><span class="p">,</span> <span class="nb">int</span><span class="p">(</span>i<span class="n">chn1</span><span class="p">),</span> <span class="nb">int</span><span class="p">(</span>i<span class="n">chn2</span><span class="p">)</span>
a<span class="n">samp</span> <span class="nb">soundin</span> <span class="s">"fox.wav"</span>
k<span class="n">mov</span> <span class="nb">linseg</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">1</span>
a<span class="n">1</span><span class="p">,</span> a<span class="n">2</span> <span class="nb">pan2</span> a<span class="n">samp</span><span class="p">,</span> k<span class="n">mov</span>
<span class="nb">outch</span> <span class="nb">int</span><span class="p">(</span>i<span class="n">chn1</span><span class="p">),</span> a<span class="n">1</span><span class="p">,</span> <span class="nb">int</span><span class="p">(</span>i<span class="n">chn2</span><span class="p">),</span> a<span class="n">2</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">r</span> <span class="mi">5</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">3</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1">
<a id="idm281472908072600"></a>
<h2>See Also</h2>
<p>
<a class="link" href="out32.html" title="out32"><em class="citetitle">out32</em></a>,
<a class="link" href="outc.html" title="outc"><em class="citetitle">outc</em></a>,
<a class="link" href="outx.html" title="outx"><em class="citetitle">outx</em></a>,
<a class="link" href="outz.html" title="outz"><em class="citetitle">outz</em></a>
</p>
<p> More information on this opcode: <a class="ulink" href="http://www.csoundjournal.com/issue16/audiorouting.html" target="_top"><em class="citetitle">http://www.csoundjournal.com/issue16/audiorouting.html</em></a> , written by Andreas Russo </p>
</div>
<div class="refsect1">
<a id="idm281472908066312"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: John ffitch</td>
</tr>
<tr>
<td>University of Bath/Codemist Ltd.</td>
</tr>
<tr>
<td>Bath, UK</td>
</tr>
<tr>
<td>May 2000</td>
</tr>
</table>
<p>
</p>
<p>New in Csound Version 4.07</p>
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