<?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>vdelayx</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="vdelay3.html" title="vdelay3" /> <link rel="next" href="vdelayxq.html" title="vdelayxq" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">vdelayx</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="vdelay3.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="vdelayxq.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry" title="vdelayx"> <a id="vdelayx"></a> <div class="titlepage"></div> <a id="IndexVdelayx" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">vdelayx</span> </h2> <p>vdelayx — A variable delay opcode with high quality interpolation. </p> </div> <div class="refsect1" title="Description"> <a id="id3327276"></a> <h2>Description</h2> <p> A variable delay opcode with high quality interpolation. </p> </div> <div class="refsect1" title="Syntax"> <a id="id3327287"></a> <h2>Syntax</h2> <pre class="synopsis">aout <span class="command"><strong>vdelayx</strong></span> ain, adl, imd, iws [, ist]</pre> </div> <div class="refsect1" title="Initialization"> <a id="id3327306"></a> <h2>Initialization</h2> <p> <span class="emphasis"><em>imd</em></span> -- max. delay time (seconds) </p> <p> <span class="emphasis"><em>iws</em></span> -- interpolation window size (see below) </p> <p> <span class="emphasis"><em>ist</em></span> (optional) -- skip initialization if not zero </p> </div> <div class="refsect1" title="Performance"> <a id="id3328191"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>aout</em></span> -- output audio signal </p> <p> <span class="emphasis"><em>ain</em></span> -- input audio signal </p> <p> <span class="emphasis"><em>adl</em></span> -- delay time in seconds </p> <p> This opcode uses high quality (and slow) interpolation, that is much more accurate than the currently available linear and cubic interpolation. The <span class="emphasis"><em>iws</em></span> parameter sets the number of input samples used for calculating one output sample (allowed values are any integer multiply of 4 in the range 4 - 1024); higher values mean better quality and slower speed. </p> <div class="note" title="Notes" style="margin-left: 0.5in; margin-right: 0.5in;"> <table border="0" summary="Note: Notes"> <tr> <td rowspan="2" align="center" valign="top" width="25"> <img alt="[Note]" src="images/note.png" /> </td> <th align="left">Notes</th> </tr> <tr> <td align="left" valign="top"> <p> </p> <div class="itemizedlist"> <ul class="itemizedlist" type="disc"> <li class="listitem"> <p>Delay time is measured in seconds (unlike in vdelay and vdelay3), and must be a-rate.</p> </li> <li class="listitem"> <p>The minimum allowed delay is iws/2 samples.</p> </li> <li class="listitem"> <p>Using the same variables as input and output is allowed in these opcodes.</p> </li> <li class="listitem"> <p>In vdelayxw*, changing the delay time has some effects on output volume: </p> <div class="literallayout"> <p>a = 1 / (1 + dt)</p> </div> <p> where a is the output gain, and dt is the change of delay time per seconds.</p> </li> <li class="listitem"> <p>These opcodes are best used in the double-precision version of Csound.</p> </li> </ul> </div> <p> </p> </td> </tr> </table> </div> </div> <div class="refsect1" title="See Also"> <a id="id3328282"></a> <h2>See Also</h2> <p> <a class="link" href="vdelayxq.html" title="vdelayxq"><em class="citetitle">vdelayxq</em></a>, <a class="link" href="vdelayxs.html" title="vdelayxs"><em class="citetitle">vdelayxs</em></a>, <a class="link" href="vdelayxw.html" title="vdelayxw"><em class="citetitle">vdelayxw</em></a>, <a class="link" href="vdelayxwq.html" title="vdelayxwq"><em class="citetitle">vdelayxwq</em></a>, <a class="link" href="vdelayxws.html" title="vdelayxws"><em class="citetitle">vdelayxws</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="vdelay3.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="vdelayxq.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">vdelay3 </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> vdelayxq</td> </tr> </table> </div> </body> </html>