<?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>pvslock</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="pvsin.html" title="pvsin" /> <link rel="next" href="pvsmaska.html" title="pvsmaska" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">pvslock</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="pvsin.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="pvsmaska.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="pvslock"></a> <div class="titlepage"></div> <a id="IndexPvslock" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">pvslock</span> </h2> <p>pvslock — Frequency lock an input fsig </p> </div> <div class="refsect1"> <a id="idm281472898493560"></a> <h2>Description</h2> <p> This opcode searches for spectral peaks and then locks the frequencies around those peaks. This is similar to phase-locking in non-streaming PV processing. It can be used to improve timestretching and pitch-shifting quality in PV processing. </p> </div> <div class="refsect1"> <a id="idm281472898433192"></a> <h2>Syntax</h2> <pre class="synopsis">fsig <span class="command"><strong>pvslock</strong></span> fsigin, klock</pre> </div> <div class="refsect1"> <a id="idm281472898431080"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>fsig</em></span> -- output pv stream </p> <p> <span class="emphasis"><em>fsigin</em></span> -- input pv stream. </p> <p> <span class="emphasis"><em>klock</em></span> -- frequency lock, 1 -> lock, 0 -> unlock (bypass). </p> <div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;"> <table border="0" summary="Warning"> <tr> <td rowspan="2" align="center" valign="top" width="25"> <img alt="[Warning]" src="images/warning.png" /> </td> <th align="left">Warning</th> </tr> <tr> <td align="left" valign="top"> <p> It is unsafe to use the same f-variable for both input and output of pvs opcodes. Using the same one might lead to undefined behavior on some opcodes. Use a different one on the left and right sides of the opcode. </p> </td> </tr> </table> </div> </div> <div class="refsect1"> <a id="idm281472898426776"></a> <h2>Examples</h2> <p> Here is an example of the pvslock opcode. It uses the file <a class="ulink" href="examples/pvslock.csd" target="_top"><em class="citetitle">pvslock.csd</em></a>. </p> <div class="example"> <a id="idm281472898424920"></a> <p class="title"> <strong>Example 771. Example of the pvslock 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="idm281472719558104"></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 pvslock.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">fil</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">0</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="s">"fox.wav"</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span> <span class="kd">instr</span> <span class="nf">1</span> k<span class="n">lock</span> <span class="o">=</span> <span class="nb">p4</span> <span class="n">fsig</span> <span class="nb">pvstanal</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> gi<span class="n">fil</span> <span class="c1">; no further transformations </span> <span class="n">fsigout</span> <span class="nb">pvslock</span> <span class="n">fsig</span><span class="p">,</span> k<span class="n">lock</span> <span class="c1">; lock frequency </span> a<span class="n">out</span> <span class="nb">pvsynth</span> <span class="n">fsigout</span> <span class="nb">outs</span> a<span class="n">out</span><span class="p">,</span> a<span class="n">out</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="mf">2.6</span> <span class="mi">1</span> <span class="c1">; locked</span> <span class="nb">i</span> <span class="mi">1</span> <span class="mi">3</span> <span class="mf">2.6</span> <span class="mi">0</span> <span class="c1">; not locked </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="idm281472898420728"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Author: Victor Lazzarini</td> </tr> <tr> <td>November 2004 </td> </tr> </table> <p> </p> <p>New plugin in version 5</p> <p>November 2004.</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="pvsin.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="pvsmaska.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">pvsin </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> pvsmaska</td> </tr> </table> </div> </body> </html>