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<refentry id="nchnls_i">
<indexterm id="IndexNchns_I"><primary>nchnls_i</primary></indexterm>
<refentryinfo><title>Orchestra Syntax:Header</title></refentryinfo>
<refmeta>
<refentrytitle>nchnls_i</refentrytitle>
</refmeta>
<refnamediv>
<refname>nchnls_i</refname>
<refpurpose>
Sets the number of channels of audio input.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
These statements are global value <link
linkend="assign"><citetitle>assignments</citetitle></link>, made
at the beginning of an orchestra, before any instrument block is
defined. Their function is to set certain <link
linkend="VariableTypes"><citetitle>reserved symbol
variables</citetitle></link> that are required for
performance. Once set, these reserved symbols can be used in
expressions anywhere in the orchestra.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis><command>nchnls_i</command> = iarg</synopsis>
</refsect1>
<refsect1>
<title>Initialization</title>
<para>
<emphasis>nchnls_i</emphasis> = (optional) -- set number of channels of
audio input to <emphasis>iarg</emphasis>. (1 = mono, 2 = stereo, 4 =
quadraphonic.) The default value is the valus of <emphasis>nchnls</emphasis>.
</para>
<para>
In addition, any <link linkend="GlobalVariables"><citetitle>global variable</citetitle></link> can be initialized by an <emphasis>init-time assignment</emphasis> anywhere before the first <link linkend="instr"><citetitle>instr statement</citetitle></link>. All of the above assignments are run as instrument 0 (i-pass only) at the start of real performance.
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Here is an example of the nchnls_i opcode. It uses the file <ulink url="examples/nchnls_i.csd"><citetitle>nchnls_i.csd</citetitle></ulink>.
<example>
<title>Example of the nchnls_i 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/nchnls_i.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<link linkend="kr"><citetitle>kr</citetitle></link>,
<link linkend="ksmps"><citetitle>ksmps</citetitle></link>,
<link linkend="nchnls"><citetitle>nchnls</citetitle></link>,
<link linkend="sr"><citetitle>sr</citetitle></link>
</para>
</refsect1>
</refentry>
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