<?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>loopsegp</title>
<link rel="stylesheet" type="text/css" href="csound.css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1" />
<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="loopseg.html" title="loopseg" />
<link rel="next" href="looptseg.html" title="looptseg" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">loopsegp</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="loopseg.html">Prev</a> </td>
<th width="60%" align="center">Orchestra Opcodes and Operators</th>
<td width="20%" align="right"> <a accesskey="n" href="looptseg.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry" title="loopsegp">
<a id="loopsegp"></a>
<div class="titlepage"></div>
<a id="Indexloopsegp" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">loopsegp</span>
</h2>
<p>loopsegp —
Control signals based on linear segments.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp29021312"></a>
<h2>Description</h2>
<p>
Generate control signal consisiting of linear segments delimited
by two or more specified points. The entire envelope can be looped
at time-variant rate. Each segment coordinate can also be varied
at k-rate.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp29022144"></a>
<h2>Syntax</h2>
<pre class="synopsis">ksig <span class="command"><strong>loopsegp</strong></span> kphase, kvalue0, kdur0, kvalue1 \
[, kdur1, ... , kdurN-1, kvalueN]</pre>
</div>
<div class="refsect1" title="Performance">
<a id="idp29032720"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>ksig</em></span> - output signal
</p>
<p>
<span class="emphasis"><em>kphase</em></span> - point of the sequence read, expressed as a fraction of a cycle (0 to 1)
</p>
<p>
<span class="emphasis"><em>kvalue0</em></span> ...<span class="emphasis"><em>kvalueN</em></span> - values of points
</p>
<p>
<span class="emphasis"><em>kdur0</em></span> ...<span class="emphasis"><em>kdurN-1</em></span> - duration of points expessed in fraction of a cycle
</p>
<p>
<span class="emphasis"><em>loopsegp</em></span> opcode is similar to <a class="link" href="loopseg.html" title="loopseg"><em class="citetitle">loopseg</em></a>; the only difference is that, instead of frequency, a time-variant phase is required. If you use <a class="link" href="phasor.html" title="phasor"><em class="citetitle">phasor</em></a> to get the phase value, you will have a behaviour identical to <a class="link" href="loopseg.html" title="loopseg"><em class="citetitle">loopseg</em></a>, but interesting results can be achieved when using phases having non-linear motions, making <span class="emphasis"><em>loopsegp</em></span> more powerful and general than <a class="link" href="loopseg.html" title="loopseg"><em class="citetitle">loopseg</em></a>.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp29077840"></a>
<h2>Examples</h2>
<p>
Here is an example of the loopsegp opcode. It uses the file <a class="ulink" href="examples/loopsegp.csd" target="_top"><em class="citetitle">loopsegp.csd</em></a>.
</p>
<div class="example">
<a id="idp29078824"></a>
<p class="title">
<strong>Example 406. Example of the loopsegp opcode.</strong>
</p>
<div class="example-contents">
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
<span class="comment">; Audio out Audio in</span>
-odac -iadc <span class="comment">;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o loopsegp.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span><span class="op">=</span>44100
<span class="ohdr">ksmps</span><span class="op">=</span>1
<span class="ohdr">nchnls</span><span class="op">=</span>2
<span class="comment">; By Mark Van Peteghem 2008</span>
<span class="oblock">instr</span> 1
iphase <span class="op">=</span> p4
kenv <span class="opc">linen</span> 1, 0.1, p3, 0.1
kph_amp <span class="opc">phasor</span> 2, 0
kamp <span class="opc">loopsegp</span> kph_amp, 60, 1, 30, 1, 60
kamp <span class="op">=</span> <span class="opc">ampdb</span>(kamp)<span class="op">*</span>kenv
kph_freq <span class="opc">phasor</span> 2, iphase
klow_freq <span class="opc">line</span> 200, p3, 100
kfreq <span class="opc">loopsegp</span> kph_freq, 400, 1, klow_freq, 1, 400
asig <span class="opc">vco2</span> kamp, kfreq, 2, 0.5
<span class="opc">outs</span> asig, asig
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span>1 0 3 0
<span class="stamnt">i</span>1 + . 0.50
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp29079840"></a>
<h2>Credits</h2>
<p>Written by Gabriel Maldonado.</p>
<p>New in Csound 5. (Previously available only on CsoundAV)</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="loopseg.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="looptseg.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">loopseg </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> looptseg</td>
</tr>
</table>
</div>
</body>
</html>
distrib
>
Mageia
>
5
>
x86_64
>
media
>
core-release
>
by-pkgid
>
b707d9a4ee443103660a75ccb6e51334
>
files
>
2127
