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<refentry id="outch">
<indexterm id="IndexOutch"><primary>outch</primary></indexterm>
<refentryinfo><title>Signal I/O:Signal Output</title></refentryinfo>
<refmeta>
<refentrytitle>outch</refentrytitle>
</refmeta>
<refnamediv>
<refname>outch</refname>
<refpurpose>
Writes multi-channel audio data, with user-controllable channels, to an external device or stream.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Writes multi-channel audio data, with user-controllable channels, to an external device or stream.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis><command>outch</command> kchan1, asig1 [, kchan2] [, asig2] [...]</synopsis>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>outch</emphasis> outputs <emphasis>asig1</emphasis> on the channel determined by <emphasis>kchan1</emphasis>, <emphasis>asig2</emphasis> on the channel determined by <emphasis>kchan2</emphasis>, etc.
</para>
<note>
<para>
The highest number for <emphasis>kchanX</emphasis> available for use with <emphasis>outch</emphasis> depends on <link linkend="nchnls"><citetitle>nchnls</citetitle></link>. If <emphasis>kchanX</emphasis> is greater than <emphasis>nchnls</emphasis>, <emphasis>asigX</emphasis> will be silent. Note that <emphasis>outch</emphasis> will give a warning but not an error in this case.
</para>
</note>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Here is an example of the outch opcode. It uses the file <ulink url="examples/outch.csd"><citetitle>outch.csd</citetitle></ulink>.
<example>
<title>Example of the outch opcode.</title>
<para>See the sections <link linkend="UsingRealTime"><citetitle>Real-time Audio</citetitle></link> and <link linkend="CommandFlags"><citetitle>Command Line Flags</citetitle></link> for more information on using command line flags.</para>
<xi:include href="examples-xml/outch.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
<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
........
</screen>
</para>
<para>
Here is another example of the outch opcode. It uses the file <ulink url="examples/outch.csd"><citetitle>outch-2.csd</citetitle></ulink>.
<example>
<title>Another example of the outch opcode.</title>
<xi:include href="examples-xml/outch-2.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<link linkend="out32"><citetitle>out32</citetitle></link>,
<link linkend="outc"><citetitle>outc</citetitle></link>,
<link linkend="outx"><citetitle>outx</citetitle></link>,
<link linkend="outz"><citetitle>outz</citetitle></link>
</para>
<para> More information on this opcode: <ulink url="http://www.csounds.com/journal/issue16/audiorouting.html"><citetitle>http://www.csounds.com/journal/issue16/audiorouting.html</citetitle></ulink> , written by Andreas Russo </para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: &namejohn;</member>
<member>University of Bath/Codemist Ltd.</member>
<member>Bath, UK</member>
<member>May 2000</member>
</simplelist>
</para>
<para>New in Csound Version 4.07</para>
</refsect1>
</refentry>
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