<?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>plltrack</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="platerev.html" title="platerev" /> <link rel="next" href="pluck.html" title="pluck" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">plltrack</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="platerev.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="pluck.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="plltrack"></a> <div class="titlepage"></div> <a id="Indexplltrack" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">plltrack</span> </h2> <p>plltrack — Tracks the pitch of a signal. </p> </div> <div class="refsect1"> <a id="idm281472903237720"></a> <h2>Description</h2> <p> <span class="emphasis"><em>plltrack</em></span>, a pitch tracker based on a phase-locked loop algorithm, described in Zolzer, U, Sankarababu, S.V. and Moller, S, "PLL-based Pitch Detection and Tracking for Audio Signals. Proc. of IIH-MSP 2012". </p> </div> <div class="refsect1"> <a id="idm281472903235656"></a> <h2>Syntax</h2> <pre class="synopsis">acps, alock <span class="command"><strong>plltrack</strong></span> asig, kd [, kloopf, kloopq, klf, khf, kthresh]</pre> </div> <div class="refsect1"> <a id="idm281472903174792"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>acps</em></span> -- estimated pitch in Hz. </p> <p> <span class="emphasis"><em>alock</em></span> -- phase lock indicator, a phase error indicating the quality of the tracking, with values between 0 and 1. Higher values indicate good tracking </p> <p> <span class="emphasis"><em>kd</em></span> -- PLL feedback gain, controls frequency range of PLL (between 0 and 1). Higher values increase the range of the tracking. </p> <p> <span class="emphasis"><em>kloopf</em></span> -- PLL LP filter cf, controls frequency range of PLL (opt, defaults to 20Hz). </p> <p> <span class="emphasis"><em>kloopq</em></span> -- PLL LP filter Q, controls rise time of FO step (opt, defaults to 1/3) </p> <p> <span class="emphasis"><em>klf</em></span> -- lowest tracking freq (opt, defaults to 20Hz) </p> <p> <span class="emphasis"><em>khf</em></span> -- highest tracking freq (opt, defaults to 1500Hz) </p> <p> <span class="emphasis"><em>kthresh</em></span> -- tracking signal level threshold (optional, defaults to 0.001, equiv to -60dBfs) </p> <p> <span class="emphasis"><em>plltrack</em></span> analyzes the input signal, <span class="emphasis"><em>asig</em></span>, estimating the fundamental of a monophonic signal. Its output is updated every sample. </p> </div> <div class="refsect1"> <a id="idm281472903164392"></a> <h2>Examples</h2> <p> Here is an example of the plltrack operator. It uses the file <a class="ulink" href="examples/plltrack.csd" target="_top"><em class="citetitle">plltrack.csd</em></a>. </p> <div class="example"> <a id="idm281472903162616"></a> <p class="title"> <strong>Example 700. Example of the plltrack operator.</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="idm281472724362760"></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 plltrack.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> <span class="kd">instr</span> <span class="nf">1</span> k<span class="n">d</span> <span class="o">=</span> <span class="nb">p4</span> a<span class="n">1</span> <span class="nb">diskin2</span> <span class="s">"fox.wav"</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span><span class="mi">0</span><span class="p">,</span><span class="mi">1</span> a<span class="n">pitch</span><span class="p">,</span> a<span class="n">loc</span> <span class="nb">plltrack</span> a<span class="n">1</span><span class="p">,</span> k<span class="n">d</span> k<span class="n">rms</span> <span class="nb">rms</span> a<span class="n">1</span> k<span class="n">rms</span> <span class="nb">port</span> k<span class="n">rms</span><span class="p">,</span> <span class="mf">0.01</span> a<span class="n">sig</span> <span class="nb">buzz</span> k<span class="n">rms</span><span class="p">,</span> a<span class="n">pitch</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="mi">1</span> <span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</span> <span class="c1">;mix in some dry signal as well</span> <span class="kd">endin</span> <span class="nt"></CsInstruments></span> <span class="nt"><CsScore></span> <span class="nb">f</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">65536</span> <span class="mi">10</span> <span class="mi">1</span> <span class="c1">;sine wave</span> <span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">6</span> <span class="mf">0.1</span> <span class="nb">i</span> <span class="mi">1</span> <span class="mi">7</span> <span class="mi">6</span> <span class="mf">0.3</span> <span class="c1">;more feedback</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="idm281472903158424"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Author: Victor Lazzarini</td> </tr> <tr> <td>NUI, Maynooth.</td> </tr> <tr> <td>Maynooth, Ireland</td> </tr> <tr> <td>September, 2012</td> </tr> </table> <p> </p> <p>New in Csound version 5.18.031</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="platerev.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="pluck.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">platerev </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> pluck</td> </tr> </table> </div> </body> </html>