<?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>trlowest</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="trirand.html" title="trirand" /> <link rel="next" href="trmix.html" title="trmix" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">trlowest</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="trirand.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="trmix.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="trlowest"></a> <div class="titlepage"></div> <a id="Indextrlowest" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">trlowest</span> </h2> <p>trlowest — Extracts the lowest-frequency track from a streaming track input signal. </p> </div> <div class="refsect1"> <a id="idm281472877409144"></a> <h2>Description</h2> <p> The <span class="emphasis"><em>trlowest</em></span> opcode takes an input containg TRACKS pv streaming signals (as generated, for instance by <span class="emphasis"><em>partials</em></span>) and outputs only the lowest track. In addition it outputs two k-rate signals, corresponding to the frequency and amplitude of the lowest track signal. </p> </div> <div class="refsect1"> <a id="idm281472877366680"></a> <h2>Syntax</h2> <pre class="synopsis">fsig, kfr, kamp <span class="command"><strong>trlowest</strong></span> fin1, kscal</pre> </div> <div class="refsect1"> <a id="idm281472877364600"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>fsig</em></span> -- output pv stream in TRACKS format </p> <p> <span class="emphasis"><em>kfr</em></span> -- frequency (in Hz) of the lowest-frequency track </p> <p> <span class="emphasis"><em>kamp</em></span> -- amplitude of the lowest-frequency track </p> <p> <span class="emphasis"><em>fin</em></span> -- input pv stream in TRACKS format. </p> <p> <span class="emphasis"><em>kscal</em></span> -- amplitude scaling of output. </p> </div> <div class="refsect1"> <a id="idm281472877359528"></a> <h2>Examples</h2> <p> Here is an example of the trlowest opcode. It uses the file <a class="ulink" href="examples/trlowest.csd" target="_top"><em class="citetitle">trlowest.csd</em></a>. </p> <div class="example"> <a id="idm281472877357672"></a> <p class="title"> <strong>Example 1028. Example of the trlowest 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="idm281472698300296"></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 trlowest.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> a<span class="n">in</span> <span class="nb">diskin2</span> <span class="s">"beats.wav"</span><span class="p">,</span> <span class="mi">1</span> <span class="n">fs1</span><span class="p">,</span><span class="n">fsi2</span> <span class="nb">pvsifd</span> a<span class="n">in</span><span class="p">,</span> <span class="mi">2048</span><span class="p">,</span> <span class="mi">512</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">; ifd analysis</span> <span class="n">fst</span> <span class="nb">partials</span> <span class="n">fs1</span><span class="p">,</span> <span class="n">fsi2</span><span class="p">,</span> <span class="mf">.003</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">500</span> <span class="c1">; partial tracking</span> <span class="n">flow</span><span class="p">,</span>k<span class="n">fr</span><span class="p">,</span>k<span class="n">amp</span> <span class="nb">trlowest</span> <span class="n">fst</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">; lowest freq-track </span> a<span class="n">out</span> <span class="nb">tradsyn</span> <span class="n">flow</span><span class="p">,</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> <span class="mi">1</span> <span class="c1">; resynthesis of lowest frequency</span> <span class="nb">outs</span> a<span class="n">out</span><span class="o">*</span><span class="mi">2</span><span class="p">,</span> a<span class="n">out</span><span class="o">*</span><span class="mi">2</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">8192</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">3</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> <p> The example above shows partial tracking of an ifd-analysis signal, extraction of the lowest frequency and resynthesis. </p> </div> <div class="refsect1"> <a id="idm281472877352840"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Author: Victor Lazzarini</td> </tr> <tr> <td>February 2006 </td> </tr> </table> <p> </p> <p>New in Csound 5.01</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="trirand.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="trmix.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">trirand </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> trmix</td> </tr> </table> </div> </body> </html>