<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>nchnls</title>
<link rel="stylesheet" type="text/css" href="csound.css" />
<link rel="stylesheet" type="text/css" href="syntax-highlighting.css" />
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" />
<link rel="home" href="index.html" title="The Canonical Csound Reference Manual" />
<link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" />
<link rel="prev" href="mxadsr.html" title="mxadsr" />
<link rel="next" href="nchnls_hw.html" title="nchnls_hw" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">nchnls</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="mxadsr.html">Prev</a> </td>
<th width="60%" align="center">Orchestra Opcodes and Operators</th>
<td width="20%" align="right"> <a accesskey="n" href="nchnls_hw.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry">
<a id="nchnls"></a>
<div class="titlepage"></div>
<a id="IndexNchnls" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">nchnls</span>
</h2>
<p>nchnls —
Sets the number of channels of audio output.
</p>
</div>
<div class="refsect1">
<a id="idm281472911352280"></a>
<h2>Description</h2>
<p>
These statements are global value <a class="link" href="assign.html" title="="><em class="citetitle">assignments</em></a>, made at the beginning of an orchestra, before any instrument block is defined. Their function is to set certain <a class="link" href="OrchKvar.html#VariableTypes" title="Table 3. Types of Variables"><em class="citetitle">reserved symbol variables</em></a> that are required for performance. Once set, these reserved symbols can be used in expressions anywhere in the orchestra.
</p>
</div>
<div class="refsect1">
<a id="idm281472911306744"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>nchnls</strong></span> = iarg</pre>
</div>
<div class="refsect1">
<a id="idm281472911304728"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>nchnls</em></span> = (optional) -- set number of channels of audio output to <span class="emphasis"><em>iarg</em></span>. (1 = mono, 2 = stereo, 4 = quadraphonic.) The default value is 1 (mono).
</p>
<p>
In addition, any <a class="link" href="OrchKvar.html#GlobalVariables"><em class="citetitle">global variable</em></a> can be initialized by an <span class="emphasis"><em>init-time assignment</em></span> anywhere before the first <a class="link" href="instr.html" title="instr"><em class="citetitle">instr statement</em></a>. All of the above assignments are run as instrument 0 (i-pass only) at the start of real performance.
</p>
</div>
<div class="refsect1">
<a id="idm281472911299704"></a>
<h2>Examples</h2>
<p>
Here is an example of the nchnls opcode. It uses the file <a class="ulink" href="examples/nchnls.csd" target="_top"><em class="citetitle">nchnls.csd</em></a>.
</p>
<div class="example">
<a id="idm281472911297848"></a>
<p class="title">
<strong>Example 594. Example of the nchnls 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="idm281472734754776"></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 -idac <span class="c1">;;;realtime audio I/O</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; nchnls.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="c1">;two channels out</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">in1</span><span class="p">,</span> a<span class="n">inr</span> <span class="nb">ins</span> <span class="c1">;grab your mic and sing</span>
a<span class="n">del</span> <span class="nb">linseg</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="o">*</span><span class="mf">.5</span><span class="p">,</span> <span class="mf">0.02</span><span class="p">,</span> <span class="nb">p3</span><span class="o">*</span><span class="mf">.5</span><span class="p">,</span> <span class="mi">0</span> <span class="c1">;max delay time = 20ms</span>
a<span class="n">outl</span> <span class="nb">flanger</span> a<span class="n">in1</span><span class="p">,</span> a<span class="n">del</span><span class="p">,</span> <span class="mf">.7</span>
a<span class="n">outr</span> <span class="nb">flanger</span> a<span class="n">in1</span><span class="p">,</span> a<span class="n">del</span><span class="o">*</span><span class="mi">2</span><span class="p">,</span> <span class="mf">.8</span>
<span class="nb">fout</span> <span class="s">"in_s.wav"</span><span class="p">,</span> <span class="mi">14</span><span class="p">,</span> a<span class="n">outl</span><span class="p">,</span> a<span class="n">outr</span> <span class="c1">;write to stereo file,</span>
<span class="nb">outs</span> a<span class="n">outl</span><span class="p">,</span> a<span class="n">outr</span> <span class="c1">;16 bits with header</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">10</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="idm281472911293560"></a>
<h2>See Also</h2>
<p>
<a class="link" href="kr.html" title="kr"><em class="citetitle">kr</em></a>,
<a class="link" href="ksmps.html" title="ksmps"><em class="citetitle">ksmps</em></a>,
<a class="link" href="sr.html" title="sr"><em class="citetitle">sr</em></a>
</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="mxadsr.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="OpcodesTop.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="nchnls_hw.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">mxadsr </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> nchnls_hw</td>
</tr>
</table>
</div>
</body>
</html>
distrib
>
Mageia
>
7
>
armv7hl
>
media
>
core-release
>
by-pkgid
>
5fcfcb7517038d1f44ab4e478e6e61fa
>
files
>
2511
