<?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>lpshold</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="lpreson.html" title="lpreson" /> <link rel="next" href="lpsholdp.html" title="lpsholdp" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">lpshold</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="lpreson.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="lpsholdp.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry" title="lpshold"> <a id="lpshold"></a> <div class="titlepage"></div> <a id="IndexLpshold" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">lpshold</span> </h2> <p>lpshold — Generate control signal consisting of held segments. </p> </div> <div class="refsect1" title="Description"> <a id="idp29926968"></a> <h2>Description</h2> <p> Generate control signal consisting of held segments delimited by two or more specified points. The entire envelope is looped at <span class="emphasis"><em>kfreq</em></span> rate. Each parameter can be varied at k-rate. </p> </div> <div class="refsect1" title="Syntax"> <a id="idp29927992"></a> <h2>Syntax</h2> <pre class="synopsis">ksig <span class="command"><strong>lpshold</strong></span> kfreq, ktrig, iphase, ktime0, kvalue0 [, ktime1] [, kvalue1] [, ktime2] [, kvalue2] [...]</pre> </div> <div class="refsect1" title="Performance"> <a id="idp29929096"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>ksig</em></span> -- Output signal </p> <p> <span class="emphasis"><em>kfreq</em></span> -- Repeat rate in Hz or fraction of Hz </p> <p> <span class="emphasis"><em>ktrig</em></span> -- If non-zero, retriggers the envelope from start (see <a class="link" href="trigger.html" title="trigger"><em class="citetitle">trigger opcode</em></a>), before the envelope cycle is completed. </p> <p> <span class="emphasis"><em>iphase</em></span> -- A vaue between 0 and 1 to say where to start the loop. Zero, the commonest value, indicates the beginning. </p> <p> <span class="emphasis"><em>ktime0...ktimeN</em></span> -- Times of points; expressed in fraction of a cycle </p> <p> <span class="emphasis"><em>kvalue0...kvalueN</em></span> -- Values of points </p> <p> <span class="emphasis"><em>lpshold</em></span> is similar to <a class="link" href="loopseg.html" title="loopseg"><em class="citetitle">loopseg</em></a>, but can generate only horizontal segments, i.e. holds values for each time interval placed between <span class="emphasis"><em>ktimeN</em></span> and <span class="emphasis"><em>ktimeN+1</em></span>. It can be useful, among other things, for melodic control, like old analog sequencers. </p> </div> <div class="refsect1" title="Examples"> <a id="idp29934840"></a> <h2>Examples</h2> <p> Here is an example of the lpshold opcode. It uses the file <a class="ulink" href="examples/lpshold.csd" target="_top"><em class="citetitle">lpshold.csd</em></a>. </p> <div class="example"> <a id="idp29935824"></a> <p class="title"> <strong>Example 429. Example of the lpshold 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> <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> -odac <span class="comment">;;;realtime audio out</span> <span class="comment">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span> <span class="comment">; For Non-realtime ouput leave only the line below:</span> <span class="comment">; -o lpshold.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> 32 <span class="ohdr">nchnls</span> <span class="op">=</span> 2 <span class="ohdr">0dbfs</span> <span class="op">=</span> 1 <span class="oblock">instr</span> 1 kfrq <span class="opc">line</span> 15, p3, .1 klp <span class="opc">lpshold</span> kfrq, 0, 0, p3<span class="op">*</span>0.25, 220, p3<span class="op">*</span>0.5, 440, p3<span class="op">*</span>0.25, 0 asig <span class="opc">oscili</span> .6, 440<span class="op">+</span>klp, 1 <span class="opc">outs</span> asig, asig <span class="oblock">endin</span> <span class="csdtag"></CsInstruments></span> <span class="csdtag"><CsScore></span> <span class="comment">; sine wave.</span> <span class="stamnt">f</span> 1 0 16384 10 1 <span class="stamnt">i</span> 1 0 10 <span class="stamnt">e</span> <span class="csdtag"></CsScore></span> <span class="csdtag"></CsoundSynthesizer></span> </pre> </div> </div> <p><br class="example-break" /> </p> </div> <div class="refsect1" title="See Also"> <a id="idp29938136"></a> <h2>See Also</h2> <p> <a class="link" href="loopseg.html" title="loopseg"><em class="citetitle">loopseg</em></a> </p> </div> <div class="refsect1" title="Credits"> <a id="idp29939184"></a> <h2>Credits</h2> <p>Author: Gabriel Maldonado</p> <p>New in Version 4.13</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="lpreson.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="lpsholdp.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">lpreson </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> lpsholdp</td> </tr> </table> </div> </body> </html>