<?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>pvsynth</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="pvsvoc.html" title="pvsvoc" /> <link rel="next" href="pvswarp.html" title="pvswarp" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">pvsynth</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="pvsvoc.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="pvswarp.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="pvsynth"></a> <div class="titlepage"></div> <a id="IndexPvsynth" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">pvsynth</span> </h2> <p>pvsynth — Resynthesise using a FFT overlap-add. </p> </div> <div class="refsect1"> <a id="idm281472897781960"></a> <h2>Description</h2> <p> Resynthesise phase vocoder data (f-signal) using a FFT overlap-add. </p> </div> <div class="refsect1"> <a id="idm281472897717416"></a> <h2>Syntax</h2> <pre class="synopsis">ares <span class="command"><strong>pvsynth</strong></span> fsrc, [iinit]</pre> </div> <div class="refsect1"> <a id="idm281472897715368"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>ares</em></span> -- output audio signal </p> <p> <span class="emphasis"><em>fsrc</em></span> -- input signal </p> <p> <span class="emphasis"><em>iinit</em></span> -- not yet implemented. </p> </div> <div class="refsect1"> <a id="idm281472897712040"></a> <h2>Examples</h2> <p> </p> <div class="example"> <a id="idm281472897711112"></a> <p class="title"> <strong>Example 784. Example (using score-supplied f-table, assuming fsig <span class="emphasis"><em>fftsize = 1024</em></span>)</strong> </p> <div class="example-contents"> <pre class="programlisting"> <span class="comment">; score f-table using cubic spline to define shaped peaks</span> <span class="stamnt">f</span>1 0 513 8 0 2 1 3 0 4 1 6 0 10 1 12 0 16 1 32 0 1 0 436 0 asig <span class="opc">buzz</span> 20000, 199, 50, 1 <span class="comment">; pulsewave source</span> fsig <span class="opc">pvsanal</span> asig, 1024, 256, 1024, 0 <span class="comment">; create fsig</span> kmod <span class="opc">linseg</span> 0, p3/2, 1, p3/2, 0 <span class="comment">; simple control sig</span> fsigout <span class="opc">pvsmaska</span> fsig, 2, kmod <span class="comment">; apply weird eq to fsig</span> aout <span class="opc">pvsynth</span> fsigout <span class="comment">; resynthesize,</span> <span class="opc">dispfft</span> aout, 0.1, 1024 <span class="comment">; and view the effect</span></pre> </div> </div> <p><br class="example-break" /> </p> <p> Here is an example of the pvsynth opcode. It uses the file <a class="ulink" href="examples/pvsynth.csd" target="_top"><em class="citetitle">pvsynth.csd</em></a>. </p> <div class="example"> <a id="idm281472897698136"></a> <p class="title"> <strong>Example 785. Example of the pvsynth 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="idm281472719516152"></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> <span class="c1">; Audio out Audio in</span> -odac <span class="c1">;;;RT audio I/O</span> <span class="c1">; For Non-realtime ouput leave only the line below:</span> <span class="c1">; -o pvsynth.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">16</span> <span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span> <span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span> <span class="c1">;; example written by joachim heintz 2009</span> <span class="kd">instr</span> <span class="nf">1</span> i<span class="n">fftsize</span> <span class="o">=</span> <span class="mi">1024</span> i<span class="n">overlap</span> <span class="o">=</span> i<span class="n">fftsize</span> <span class="o">/</span> <span class="mi">4</span> i<span class="n">winsize</span> <span class="o">=</span> i<span class="n">fftsize</span> i<span class="n">winshape</span> <span class="o">=</span> <span class="mi">1</span> <span class="c1">; von-Hann window</span> S<span class="n">file</span> <span class="o">=</span> <span class="s">"fox.wav"</span> a<span class="n">in</span> <span class="nb">soundin</span> S<span class="n">file</span> <span class="n">fftin</span> <span class="nb">pvsanal</span> a<span class="n">in</span><span class="p">,</span> i<span class="n">fftsize</span><span class="p">,</span> i<span class="n">overlap</span><span class="p">,</span> i<span class="n">winsize</span><span class="p">,</span> i<span class="n">winshape</span><span class="c1">; fft-analysis of the audio-signal</span> a<span class="n">out</span> <span class="nb">pvsynth</span> <span class="n">fftin</span><span class="c1">; resynthesis</span> <span class="nb">out</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="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> </div> <div class="refsect1"> <a id="idm281472897693848"></a> <h2>See Also</h2> <p> <a class="link" href="pvsanal.html" title="pvsanal"><em class="citetitle">pvsanal</em></a>, <a class="link" href="pvsadsyn.html" title="pvsadsyn"><em class="citetitle">pvsadsyn</em></a> </p> </div> <div class="refsect1"> <a id="idm281472897690840"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Author: Richard Dobson</td> </tr> <tr> <td>August 2001 </td> </tr> </table> <p> </p> <p>New in version 4.13</p> <p>February 2004. Thanks to a note from Francisco Vila, updated the example.</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="pvsvoc.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="pvswarp.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">pvsvoc </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> pvswarp</td> </tr> </table> </div> </body> </html>