<?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>cosseg</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="cos.html" title="cos" /> <link rel="next" href="cossegb.html" title="cossegb" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">cosseg</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="cos.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="cossegb.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="cosseg"></a> <div class="titlepage"></div> <a id="IndexCosseg" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">cosseg</span> </h2> <p>cosseg — Trace a series of line segments between specified points with cosine interpolation. </p> </div> <div class="refsect1"> <a id="idm281472945314872"></a> <h2>Description</h2> <p> Trace a series of line segments between specified points with cosine interpolation. </p> </div> <div class="refsect1"> <a id="idm281472945313576"></a> <h2>Syntax</h2> <pre class="synopsis">ares <span class="command"><strong>cosseg</strong></span> ia, idur1, ib [, idur2] [, ic] [...]</pre> <pre class="synopsis">kres <span class="command"><strong>cosseg</strong></span> ia, idur1, ib [, idur2] [, ic] [...]</pre> </div> <div class="refsect1"> <a id="idm281472945249320"></a> <h2>Initialization</h2> <p> <span class="emphasis"><em>ia</em></span> -- starting value. </p> <p> <span class="emphasis"><em>ib, ic</em></span>, etc. -- value after <span class="emphasis"><em>dur1</em></span> seconds, etc. </p> <p> <span class="emphasis"><em>idur1</em></span> -- duration in seconds of first segment. A zero or negative value will cause all initialization to be skipped. </p> <p> <span class="emphasis"><em>idur2, idur3</em></span>, etc. -- duration in seconds of subsequent segments. A zero or negative value will terminate the initialization process with the preceding point, permitting the last-defined line or curve to be continued indefinitely in performance. The default is zero. </p> </div> <div class="refsect1"> <a id="idm281472945244312"></a> <h2>Performance</h2> <p> These units generate control or audio signals whose values can pass through 2 or more specified points. The sum of <span class="emphasis"><em>dur</em></span> values may or may not equal the instrument's performance time: a shorter performance will truncate the specified pattern, while a longer one will cause the last value to be repeated until the end of the note. </p> </div> <div class="refsect1"> <a id="idm281472945242296"></a> <h2>Examples</h2> <p> Here is an example of the cosseg opcode. It uses the file <a class="ulink" href="examples/cosseg.csd" target="_top"><em class="citetitle">cosseg.csd</em></a>. </p> <div class="example"> <a id="idm281472945240520"></a> <p class="title"> <strong>Example 150. Example of the cosseg 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="idm281472778239320"></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 <span class="c1">;;;realtime audio out</span> <span class="c1">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span> <span class="c1">; For Non-realtime ouput leave only the line below:</span> <span class="c1">;-o linseg.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="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span> gi<span class="n">Sine</span> <span class="nb">ftgen</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">2</span><span class="o">^</span><span class="mi">10</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="mi">1</span> <span class="kd">instr</span> <span class="nf">1</span> k<span class="n">cps</span> <span class="o">=</span> <span class="nb">cpspch</span><span class="p">(</span><span class="nb">p4</span><span class="p">)</span> k<span class="n">env</span> <span class="nb">cosseg</span> <span class="mi">0</span><span class="p">,</span> <span class="mf">0.25</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">0.75</span><span class="p">,</span> <span class="mi">0</span> <span class="c1">; together = 1 sec</span> a<span class="n">sig</span> <span class="nb">poscil</span> k<span class="n">env</span><span class="p">,</span> k<span class="n">cps</span><span class="p">,</span> gi<span class="n">Sine</span> <span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</span> <span class="kd">endin</span> <span class="kd">instr</span> <span class="nf">2</span> <span class="c1">; scaling to duration</span> k<span class="n">cps</span> <span class="o">=</span> <span class="nb">cpspch</span><span class="p">(</span><span class="nb">p4</span><span class="p">)</span> k<span class="n">env</span> <span class="nb">cosseg</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="o">*</span><span class="mf">0.25</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span><span class="o">*</span><span class="mf">0.75</span><span class="p">,</span> <span class="mi">0</span> a<span class="n">sig</span> <span class="nb">poscil</span> k<span class="n">env</span><span class="p">,</span> k<span class="n">cps</span><span class="p">,</span> gi<span class="n">Sine</span> <span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</span> <span class="kd">endin</span> <span class="kd">instr</span> <span class="nf">3</span> <span class="c1">; with negative value</span> k<span class="n">cps</span> <span class="o">=</span> <span class="nb">cpspch</span><span class="p">(</span><span class="nb">p4</span><span class="p">)</span> a<span class="n">env</span> <span class="nb">cosseg</span> <span class="mi">0</span><span class="p">,</span> <span class="mf">0.1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="o">-</span><span class="mf">0.9</span><span class="p">,</span> <span class="mf">0.4</span><span class="p">,</span> <span class="mi">0</span> a<span class="n">sig</span> <span class="nb">poscil</span> a<span class="n">env</span><span class="p">,</span> k<span class="n">cps</span><span class="p">,</span> gi<span class="n">Sine</span> <span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</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">1</span> <span class="mf">7.00</span> <span class="c1">; = 1 sec, p3 fits exactly</span> <span class="nb">i</span> <span class="mi">1</span> <span class="mi">2</span> <span class="mi">2</span> <span class="mf">7.00</span> <span class="c1">; = 2 sec, p3 truncated at 1 sec</span> <span class="nb">i</span> <span class="mi">2</span> <span class="mi">4</span> <span class="mi">1</span> <span class="mf">7.00</span> <span class="c1">; scales to duration</span> <span class="nb">i</span> <span class="mi">2</span> <span class="mi">6</span> <span class="mi">2</span> <span class="mf">7.00</span> <span class="c1">; of p3</span> <span class="nb">i</span> <span class="mi">3</span> <span class="mi">9</span> <span class="mi">2</span> <span class="mf">7.00</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="idm281472945236328"></a> <h2>See Also</h2> <p> <a class="link" href="expon.html" title="expon"><em class="citetitle">expon</em></a>, <a class="link" href="expseg.html" title="expseg"><em class="citetitle">expseg</em></a>, <a class="link" href="expsegb.html" title="expsegb"><em class="citetitle">expsegb</em></a>, <a class="link" href="expsegr.html" title="expsegr"><em class="citetitle">expsegr</em></a>, <a class="link" href="line.html" title="line"><em class="citetitle">line</em></a>, <a class="link" href="linseg.html" title="linseg"><em class="citetitle">linseg</em></a>, <a class="link" href="linsegr.html" title="linsegr"><em class="citetitle">linsegr</em></a> <a class="link" href="transeg.html" title="transeg"><em class="citetitle">transeg</em></a> <a class="link" href="transegb.html" title="transegb"><em class="citetitle">transegb</em></a> </p> </div> <div class="refsect1"> <a id="idm281472945226664"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Author: John ffitch</td> </tr> <tr> <td>Aug 2012 </td> </tr> </table> <p> </p> <p> New in version 5.18</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="cos.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="cossegb.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">cos </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> cossegb</td> </tr> </table> </div> </body> </html>