<?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>wgbowedbar</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="wgbow.html" title="wgbow" /> <link rel="next" href="wgbrass.html" title="wgbrass" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">wgbowedbar</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="wgbow.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="wgbrass.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="wgbowedbar"></a> <div class="titlepage"></div> <a id="IndexWgbowedbar" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">wgbowedbar</span> </h2> <p>wgbowedbar — A physical model of a bowed bar. </p> </div> <div class="refsect1"> <a id="idm281472869218856"></a> <h2>Description</h2> <p> A physical model of a bowed bar, belonging to the Perry Cook family of waveguide instruments. </p> </div> <div class="refsect1"> <a id="idm281472869215320"></a> <h2>Syntax</h2> <pre class="synopsis">ares <span class="command"><strong>wgbowedbar</strong></span> kamp, kfreq, kpos, kbowpres, kgain [, iconst] [, itvel] \ [, ibowpos] [, ilow]</pre> </div> <div class="refsect1"> <a id="idm281472869213176"></a> <h2>Initialization</h2> <p> <span class="emphasis"><em>iconst</em></span> (optional, default=0) -- an integration constant. Default is zero. </p> <p> <span class="emphasis"><em>itvel</em></span> (optional, default=0) -- either 0 or 1. When <span class="emphasis"><em>itvel</em></span> = 0, the bow velocity follows an ADSR style trajectory. When <span class="emphasis"><em>itvel</em></span> = 1, the value of the bow velocity decays in an exponentially. </p> <p> <span class="emphasis"><em>ibowpos</em></span> (optional, default=0) -- the position on the bow, which affects the bow velocity trajectory. </p> <p> <span class="emphasis"><em>ilow</em></span> (optional, default=0) -- lowest frequency required </p> </div> <div class="refsect1"> <a id="idm281472869135368"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>kamp</em></span> -- amplitude of signal </p> <p> <span class="emphasis"><em>kfreq</em></span> -- frequency of signal </p> <p> <span class="emphasis"><em>kpos</em></span> -- position of the bow on the bar, in the range 0 to 1 </p> <p> <span class="emphasis"><em>kbowpres</em></span> -- pressure of the bow (as in <span class="emphasis"><em>wgbowed</em></span>) </p> <p> <span class="emphasis"><em>kgain</em></span> -- gain of filter. A value of about 0.809 is suggested. </p> </div> <div class="refsect1"> <a id="idm281472869129864"></a> <h2>Examples</h2> <p> Here is an example of the wgbowedbar opcode. It uses the file <a class="ulink" href="examples/wgbowedbar.csd" target="_top"><em class="citetitle">wgbowedbar.csd</em></a>. </p> <div class="example"> <a id="idm281472869128008"></a> <p class="title"> <strong>Example 1122. Example of the wgbowedbar 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="idm281472689165736"></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 RT audio input is needed too</span> <span class="c1">; For Non-realtime ouput leave only the line below:</span> <span class="c1">; -o wgbowedbar.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">p</span> <span class="o">=</span> <span class="nb">p6</span> a<span class="n">sig</span> <span class="nb">wgbowedbar</span> <span class="nb">p4</span><span class="p">,</span> <span class="nb">cpspch</span><span class="p">(</span><span class="nb">p5</span><span class="p">),</span> <span class="mi">1</span><span class="p">,</span> k<span class="n">p</span><span class="p">,</span> <span class="mf">0.995</span> <span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</span> <span class="kd">endin</span> <span class="nt"></CsInstruments></span> <span class="nt"><CsScore></span> <span class="nb">s</span> <span class="nb">i</span><span class="mi">1</span> <span class="mi">0</span> <span class="mf">.5</span> <span class="mf">.5</span> <span class="mf">7.00</span> <span class="mf">.1</span> <span class="c1">;short sound</span> <span class="nb">i</span><span class="mi">1</span> <span class="o">+</span> <span class="o">.</span> <span class="mf">.3</span> <span class="mf">8.00</span> <span class="mf">.1</span> <span class="nb">i</span><span class="mi">1</span> <span class="o">+</span> <span class="o">.</span> <span class="mf">.5</span> <span class="mf">9.00</span> <span class="mf">.1</span> <span class="nb">s</span> <span class="nb">i</span><span class="mi">1</span> <span class="mi">0</span> <span class="mf">.5</span> <span class="mf">.5</span> <span class="mf">7.00</span> <span class="mi">1</span> <span class="c1">;longer sound</span> <span class="nb">i</span><span class="mi">1</span> <span class="o">+</span> <span class="o">.</span> <span class="mf">.3</span> <span class="mf">8.00</span> <span class="mi">1</span> <span class="nb">i</span><span class="mi">1</span> <span class="o">+</span> <span class="o">.</span> <span class="mf">.5</span> <span class="mf">9.00</span> <span class="mi">1</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="idm281472869123720"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Author: John ffitch (after Perry Cook)</td> </tr> <tr> <td>University of Bath, Codemist Ltd.</td> </tr> <tr> <td>Bath, UK</td> </tr> </table> <p> </p> <p>New in Csound version 4.07</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="wgbow.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="wgbrass.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">wgbow </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> wgbrass</td> </tr> </table> </div> </body> </html>