<?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>barmodel</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="bamboo.html" title="bamboo" /> <link rel="next" href="bbcutm.html" title="bbcutm" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">barmodel</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="bamboo.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="bbcutm.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry" title="barmodel"> <a id="barmodel"></a> <div class="titlepage"></div> <a id="IndexBarmodel" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">barmodel</span> </h2> <p>barmodel — Creates a tone similar to a struck metal bar. </p> </div> <div class="refsect1" title="Description"> <a id="idp14431656"></a> <h2>Description</h2> <p> Audio output is a tone similar to a struck metal bar, using a physical model developed from solving the partial differential equation. There are controls over the boundary conditions as well as the bar characteristics. </p> </div> <div class="refsect1" title="Syntax"> <a id="idp14409856"></a> <h2>Syntax</h2> <pre class="synopsis">ares <span class="command"><strong>barmodel</strong></span> kbcL, kbcR, iK, ib, kscan, iT30, ipos, ivel, iwid</pre> </div> <div class="refsect1" title="Initialization"> <a id="idp14410984"></a> <h2>Initialization</h2> <p> <span class="emphasis"><em>iK</em></span> -- dimensionless stiffness parameter. If this parameter is negative then the initialisation is skipped and the previous state of the bar is continued. </p> <p> <span class="emphasis"><em>ib</em></span> -- high-frequency loss parameter (keep this small). </p> <p> <span class="emphasis"><em>iT30</em></span> -- 30 db decay time in seconds. </p> <p> <span class="emphasis"><em>ipos</em></span> -- position along the bar that the strike occurs. </p> <p> <span class="emphasis"><em>ivel</em></span> -- normalized strike velocity. </p> <p> <span class="emphasis"><em>iwid</em></span> -- spatial width of strike. </p> </div> <div class="refsect1" title="Performance"> <a id="idp14469376"></a> <h2>Performance</h2> <p> A note is played on a metalic bar, with the arguments as below. </p> <p> <span class="emphasis"><em>kbcL</em></span> -- Boundary condition at left end of bar (1 is clamped, 2 pivoting and 3 free). </p> <p> <span class="emphasis"><em>kbcR</em></span> -- Boundary condition at right end of bar (1 is clamped, 2 pivoting and 3 free). </p> <p> <span class="emphasis"><em>kscan</em></span> -- Speed of scanning the output location. </p> <p> Note that changing the boundary conditions during playing may lead to glitches and is made available as an experiment. The use of a non-zero <span class="emphasis"><em>kscan</em></span> can give apparent re-introduction of sound due to modulation. </p> </div> <div class="refsect1" title="Examples"> <a id="idp14472136"></a> <h2>Examples</h2> <p> Here is an example of the barmodel opcode. It uses the file <a class="ulink" href="examples/barmodel.csd" target="_top"><em class="citetitle">barmodel.csd</em></a>. </p> <div class="example"> <a id="idp14473120"></a> <p class="title"> <strong>Example 69. Example of the barmodel 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 barmodel.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 aq <span class="opc">barmodel</span> 1, 1, p4, 0.001, 0.23, 5, p5, p6, p7 <span class="opc">out</span> aq <span class="oblock">endin</span> <span class="csdtag"></CsInstruments></span> <span class="csdtag"><CsScore></span> <span class="stamnt">i</span>1 0.0 0.5 3 0.2 500 0.05 <span class="stamnt">i</span>1 0.5 0.5 -3 0.3 1000 0.05 <span class="stamnt">i</span>1 1.0 0.5 -3 0.4 1000 0.1 <span class="stamnt">i</span>1 1.5 4.0 -3 0.5 800 0.05 <span class="stamnt">e</span> /* barmodel */ <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="idp14475400"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Author: Stefan Bilbao </td> </tr> <tr> <td>University of Edinburgh, UK</td> </tr> <tr> <td>Author: John ffitch </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 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="bamboo.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="bbcutm.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">bamboo </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> bbcutm</td> </tr> </table> </div> </body> </html>