<?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>linen</title>
<link rel="stylesheet" href="csound.css" type="text/css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.75.2" />
<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="line.html" title="line" />
<link rel="next" href="linenr.html" title="linenr" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">linen</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="line.html">Prev</a> </td>
<th width="60%" align="center">Orchestra Opcodes and Operators</th>
<td width="20%" align="right"> <a accesskey="n" href="linenr.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry" title="linen">
<a id="linen"></a>
<div class="titlepage"></div>
<a id="IndexLinen" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">linen</span>
</h2>
<p>linen —
Applies a straight line rise and decay pattern to an input amp signal.
</p>
</div>
<div class="refsect1" title="Description">
<a id="id2982019"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>linen</em></span> -- apply a straight line rise and decay pattern to an input amp signal.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="id2982034"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>linen</strong></span> xamp, irise, idur, idec</pre>
<pre class="synopsis">kres <span class="command"><strong>linen</strong></span> kamp, irise, idur, idec</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="id2982256"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>irise</em></span> -- rise time in seconds. A zero or negative value signifies no rise modification.
</p>
<p>
<span class="emphasis"><em>idur</em></span> -- overall duration in seconds. A zero or negative value will cause initialization to be skipped.
</p>
<p>
<span class="emphasis"><em>idec</em></span> -- decay time in seconds. Zero means no decay. An <span class="emphasis"><em>idec</em></span> > <span class="emphasis"><em>idur</em></span> will cause a truncated decay.
</p>
</div>
<div class="refsect1" title="Performance">
<a id="id2982959"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kamp, xamp</em></span> -- input amplitude signal.
</p>
<p>
Rise modifications are applied for the first <span class="emphasis"><em>irise</em></span> seconds, and decay from time <span class="emphasis"><em>idur - idec</em></span>. If these periods are separated in time there will be a steady state during which <span class="emphasis"><em>amp</em></span> will be unmodified. If <span class="emphasis"><em>linen</em></span> rise and decay periods overlap then both modifications will be in effect for that time. If the overall duration <span class="emphasis"><em>idur</em></span> is exceeded in performance, the final decay will continue on in the same direction, going negative.
</p>
<p>
</p>
<div class="mediaobject">
<img src="images/linen.jpg" alt="[Envelope generated by the linen opcode]" />
<div class="caption">
<p>Envelope generated by the <span class="emphasis"><em>linen</em></span> opcode</p>
</div>
</div>
<p>
</p>
<p>
</p>
<div class="note" title="Note" style="margin-left: 0.5in; margin-right: 0.5in;">
<table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25">
<img alt="[Note]" src="images/note.png" />
</td>
<th align="left">Note</th>
</tr>
<tr>
<td align="left" valign="top">
<p>A common error with this opcode is to assume that the value of
0 is the held after the envelope has finished at
<span class="emphasis"><em>idur</em></span>. <span class="emphasis"><em>linen</em></span> does not
automatically end or stop at the end of the duration given.
If your note length is longer than <span class="emphasis"><em>idur</em></span>
seconds, <span class="emphasis"><em>kres</em></span> (or <span class="emphasis"><em>ares</em></span>)
will not come to rest at 0, but will instead continue to fall
with the same rate. If a decay and then hold is required then
the <a class="link" href="linseg.html" title="linseg"><em class="citetitle">linseg</em></a> opcode should be considered instead.
</p>
</td>
</tr>
</table>
</div>
<p>
</p>
</div>
<div class="refsect1" title="See Also">
<a id="id2983079"></a>
<h2>See Also</h2>
<p>
<a class="link" href="envlpx.html" title="envlpx"><em class="citetitle">envlpx</em></a>,
<a class="link" href="envlpxr.html" title="envlpxr"><em class="citetitle">envlpxr</em></a>,
<a class="link" href="linenr.html" title="linenr"><em class="citetitle">linenr</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="line.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="linenr.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">line </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> linenr</td>
</tr>
</table>
</div>
</body>
</html>
