<?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>wgbrass</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="wgbowedbar.html" title="wgbowedbar" /> <link rel="next" href="wgclar.html" title="wgclar" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">wgbrass</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="wgbowedbar.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="wgclar.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="wgbrass"></a> <div class="titlepage"></div> <a id="IndexWgbrass" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">wgbrass</span> </h2> <p>wgbrass — Creates a tone related to a brass instrument. </p> </div> <div class="refsect1"> <a id="idm281472869142968"></a> <h2>Description</h2> <p> Audio output is a tone related to a brass instrument, using a physical model developed from Perry Cook, but re-coded for Csound. </p> </div> <div class="refsect1"> <a id="idm281472869141336"></a> <h2>Syntax</h2> <pre class="synopsis">ares <span class="command"><strong>wgbrass</strong></span> kamp, kfreq, ktens, iatt, kvibf, kvamp \ [, ifn] [, iminfreq]</pre> </div> <div class="refsect1"> <a id="idm281472869079800"></a> <h2>Initialization</h2> <p> <span class="emphasis"><em>iatt</em></span> -- time taken to reach full pressure </p> <p> <span class="emphasis"><em>ifn</em></span> -- optional table of shape of vibrato, defaults to a sine table. </p> <p> <span class="emphasis"><em>iminfreq</em></span> -- lowest frequency at which the instrument will play. If it is omitted it is taken to be the same as the initial <span class="emphasis"><em>kfreq</em></span>. If <span class="emphasis"><em>iminfreq</em></span> is negative, initialization will be skipped. </p> </div> <div class="refsect1"> <a id="idm281472869075176"></a> <h2>Performance</h2> <p> A note is played on a brass-like instrument, with the arguments as below. </p> <p> <span class="emphasis"><em>kamp</em></span> -- Amplitude of note. </p> <p> <span class="emphasis"><em>kfreq</em></span> -- Frequency of note played. </p> <p> <span class="emphasis"><em>ktens</em></span> -- lip tension of the player. Suggested value is about 0.4 </p> <p> <span class="emphasis"><em>kvibf</em></span> -- frequency of vibrato in Hertz. Suggested range is 0 to 12 </p> <p> <span class="emphasis"><em>kvamp</em></span> -- amplitude of the vibrato </p> <div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;"> <table border="0" summary="Warning: NOTE"> <tr> <td rowspan="2" align="center" valign="top" width="25"> <img alt="[Warning]" src="images/warning.png" /> </td> <th align="left">NOTE</th> </tr> <tr> <td align="left" valign="top"> <p> This is rather poor, and at present uncontrolled. Needs revision, and possibly more parameters. </p> </td> </tr> </table> </div> </div> <div class="refsect1"> <a id="idm281472869067640"></a> <h2>Examples</h2> <p> Here is an example of the wgbrass opcode. It uses the file <a class="ulink" href="examples/wgbrass.csd" target="_top"><em class="citetitle">wgbrass.csd</em></a>. </p> <div class="example"> <a id="idm281472869065864"></a> <p class="title"> <strong>Example 1123. Example of the wgbrass 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="idm281472689082088"></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 No messages</span> -odac -iadc -d <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 wgbrass.wav -W ;;; for file output any platform</span> <span class="nt"></CsOptions></span> <span class="nt"><CsInstruments></span> <span class="c1">; Initialize the global variables.</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">10</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">; Instrument #1.</span> <span class="kd">instr</span> <span class="nf">1</span> k<span class="n">amp</span> <span class="o">=</span> <span class="mf">0.7</span> k<span class="n">freq</span> <span class="o">=</span> <span class="nb">p4</span> k<span class="n">tens</span> <span class="o">=</span> <span class="nb">p5</span> i<span class="n">att</span> <span class="o">=</span> <span class="nb">p6</span> k<span class="n">vibf</span> <span class="o">=</span> <span class="nb">p7</span> i<span class="n">fn</span> <span class="o">=</span> <span class="mi">1</span> <span class="c1">; Create an amplitude envelope for the vibrato.</span> k<span class="n">vamp</span> <span class="nb">line</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mf">0.5</span> a<span class="n">1</span> <span class="nb">wgbrass</span> k<span class="n">amp</span><span class="p">,</span> k<span class="n">freq</span><span class="p">,</span> k<span class="n">tens</span><span class="p">,</span> i<span class="n">att</span><span class="p">,</span> k<span class="n">vibf</span><span class="p">,</span> k<span class="n">vamp</span><span class="p">,</span> i<span class="n">fn</span> <span class="nb">out</span> a<span class="n">1</span> <span class="kd">endin</span> <span class="nt"></CsInstruments></span> <span class="nt"><CsScore></span> <span class="c1">; Table #1, a sine wave.</span> <span class="nb">f</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">1024</span> <span class="mi">10</span> <span class="mi">1</span> <span class="c1">; freq tens att vibf</span> <span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">4</span> <span class="mi">440</span> <span class="mf">0.4</span> <span class="mf">0.1</span> <span class="mf">6.137</span> <span class="nb">i</span> <span class="mi">1</span> <span class="mi">4</span> <span class="mi">4</span> <span class="mi">440</span> <span class="mf">0.4</span> <span class="mf">0.01</span> <span class="mf">0.137</span> <span class="nb">i</span> <span class="mi">1</span> <span class="mi">8</span> <span class="mi">4</span> <span class="mi">880</span> <span class="mf">0.4</span> <span class="mf">0.1</span> <span class="mf">6.137</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="idm281472869061640"></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 3.47</p> <p>ifn optional in 6.06</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="wgbowedbar.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="wgclar.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">wgbowedbar </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> wgclar</td> </tr> </table> </div> </body> </html>