<?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>wgpluck</title> <link rel="stylesheet" type="text/css" href="csound.css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.76.1" /> <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="wgflute.html" title="wgflute" /> <link rel="next" href="wgpluck2.html" title="wgpluck2" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">wgpluck</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="wgflute.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="wgpluck2.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry" title="wgpluck"> <a id="wgpluck"></a> <div class="titlepage"></div> <a id="IndexWgpluck" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">wgpluck</span> </h2> <p>wgpluck — A high fidelity simulation of a plucked string. </p> </div> <div class="refsect1" title="Description"> <a id="idp53879992"></a> <h2>Description</h2> <p> A high fidelity simulation of a plucked string, using interpolating delay-lines. </p> </div> <div class="refsect1" title="Syntax"> <a id="idp53880688"></a> <h2>Syntax</h2> <pre class="synopsis">ares <span class="command"><strong>wgpluck</strong></span> icps, iamp, kpick, iplk, idamp, ifilt, axcite</pre> </div> <div class="refsect1" title="Initialization"> <a id="idp53891168"></a> <h2>Initialization</h2> <p> <span class="emphasis"><em>icps</em></span> -- frequency of plucked string </p> <p> <span class="emphasis"><em>iamp</em></span> -- amplitude of string pluck </p> <p> <span class="emphasis"><em>iplk</em></span> -- point along the string, where it is plucked, in the range of 0 to 1. 0 = no pluck </p> <p> <span class="emphasis"><em>idamp</em></span> -- damping of the note. This controls the overall decay of the string. The greater the value of <span class="emphasis"><em>idamp</em></span>, the faster the decay. Negative values will cause an increase in output over time. </p> <p> <span class="emphasis"><em>ifilt</em></span> -- control the attenuation of the filter at the bridge. Higher values cause the higher harmonics to decay faster. </p> </div> <div class="refsect1" title="Performance"> <a id="idp53929208"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>kpick</em></span> -- proportion of the way along the point to sample the output. </p> <p> <span class="emphasis"><em>axcite</em></span> -- a signal which excites the string. </p> <p> A string of frequency <span class="emphasis"><em>icps</em></span> is plucked with amplitude <span class="emphasis"><em>iamp</em></span> at point <span class="emphasis"><em>iplk</em></span>. The decay of the virtual string is controlled by <span class="emphasis"><em>idamp</em></span> and <span class="emphasis"><em>ifilt</em></span> which simulate the bridge. The oscillation is sampled at the point <span class="emphasis"><em>kpick</em></span>, and excited by the signal <span class="emphasis"><em>axcite</em></span>. </p> </div> <div class="refsect1" title="Examples"> <a id="idp53932504"></a> <h2>Examples</h2> <p> The following example produces a moderately long note with rapidly decaying upper partials. It uses the file <a class="ulink" href="examples/wgpluck.csd" target="_top"><em class="citetitle">wgpluck.csd</em></a>. </p> <div class="example"> <a id="idp53933544"></a> <p class="title"> <strong>Example 993. An example of the wgpluck 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> <pre class="programlisting"> <span class="csdtag"><CsoundSynthesizer></span> <span class="csdtag"><CsOptions></span> <span class="comment">; Select audio/midi flags here according to platform</span> <span class="comment">; Audio out Audio in No messages</span> -odac -iadc -d <span class="comment">;;;RT audio I/O</span> <span class="comment">; For Non-realtime ouput leave only the line below:</span> <span class="comment">; -o wgpluck.wav -W ;;; for file output any platform</span> <span class="csdtag"></CsOptions></span> <span class="csdtag"><CsInstruments></span> <span class="comment">; Initialize the global variables.</span> <span class="ohdr">sr</span> <span class="op">=</span> 44100 <span class="ohdr">kr</span> <span class="op">=</span> 4410 <span class="ohdr">ksmps</span> <span class="op">=</span> 10 <span class="ohdr">nchnls</span> <span class="op">=</span> 1 <span class="comment">; Instrument #1.</span> <span class="oblock">instr</span> 1 icps <span class="op">=</span> 220 iamp <span class="op">=</span> 20000 kpick <span class="op">=</span> 0.5 iplk <span class="op">=</span> 0 idamp <span class="op">=</span> 10 ifilt <span class="op">=</span> 1000 axcite <span class="opc">oscil</span> 1, 1, 1 apluck <span class="opc">wgpluck</span> icps, iamp, kpick, iplk, idamp, ifilt, axcite <span class="opc">out</span> apluck <span class="oblock">endin</span> <span class="csdtag"></CsInstruments></span> <span class="csdtag"><CsScore></span> <span class="comment">; Table #1, a sine wave.</span> <span class="stamnt">f</span> 1 0 16384 10 1 <span class="comment">; Play Instrument #1 for two seconds.</span> <span class="stamnt">i</span> 1 0 2 <span class="stamnt">e</span> <span class="csdtag"></CsScore></span> <span class="csdtag"></CsoundSynthesizer></span> </pre> </div> </div> <p><br class="example-break" /> </p> <p> The following example produces a shorter, brighter note. It uses the file <a class="ulink" href="examples/wgpluck_brighter.csd" target="_top"><em class="citetitle">wgpluck_brighter.csd</em></a>. </p> <div class="example"> <a id="idp53936488"></a> <p class="title"> <strong>Example 994. An example of the wgpluck opcode with a shorter, brighter note.</strong> </p> <div class="example-contents"> <pre class="programlisting"> <span class="csdtag"><CsoundSynthesizer></span> <span class="csdtag"><CsOptions></span> <span class="comment">; Select audio/midi flags here according to platform</span> <span class="comment">; Audio out Audio in No messages</span> -odac -iadc -d <span class="comment">;;;RT audio I/O</span> <span class="comment">; For Non-realtime ouput leave only the line below:</span> <span class="comment">; -o wgpluck_brighter.wav -W ;;; for file output any platform</span> <span class="csdtag"></CsOptions></span> <span class="csdtag"><CsInstruments></span> <span class="comment">; Initialize the global variables.</span> <span class="ohdr">sr</span> <span class="op">=</span> 44100 <span class="ohdr">kr</span> <span class="op">=</span> 4410 <span class="ohdr">ksmps</span> <span class="op">=</span> 10 <span class="ohdr">nchnls</span> <span class="op">=</span> 1 <span class="comment">; Instrument #1.</span> <span class="oblock">instr</span> 1 icps <span class="op">=</span> 220 iamp <span class="op">=</span> 20000 kpick <span class="op">=</span> 0.5 iplk <span class="op">=</span> 0 idamp <span class="op">=</span> 30 ifilt <span class="op">=</span> 10 axcite <span class="opc">oscil</span> 1, 1, 1 apluck <span class="opc">wgpluck</span> icps, iamp, kpick, iplk, idamp, ifilt, axcite <span class="opc">out</span> apluck <span class="oblock">endin</span> <span class="csdtag"></CsInstruments></span> <span class="csdtag"><CsScore></span> <span class="comment">; Table #1, a sine wave.</span> <span class="stamnt">f</span> 1 0 16384 10 1 <span class="comment">; Play Instrument #1 for two seconds.</span> <span class="stamnt">i</span> 1 0 2 <span class="stamnt">e</span> <span class="csdtag"></CsScore></span> <span class="csdtag"></CsoundSynthesizer></span> </pre> </div> </div> <p><br class="example-break" /> </p> </div> <div class="refsect1" title="Credits"> <a id="idp53937472"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Author: Michael A. Casey</td> </tr> <tr> <td>M.I.T.</td> </tr> <tr> <td>Cambridge, Mass.</td> </tr> <tr> <td>1997</td> </tr> </table> <p> </p> <p>New in Version 3.47</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="wgflute.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="wgpluck2.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">wgflute </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> wgpluck2</td> </tr> </table> </div> </body> </html>