<?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>crunch</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="crossfm.html" title="crossfm" /> <link rel="next" href="ctrl14.html" title="ctrl14" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">crunch</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="crossfm.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="ctrl14.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="crunch"></a> <div class="titlepage"></div> <a id="IndexCrush" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">crunch</span> </h2> <p>crunch — Semi-physical model of a crunch sound. </p> </div> <div class="refsect1"> <a id="idm281472943789160"></a> <h2>Description</h2> <p> <span class="emphasis"><em>crunch</em></span> is a semi-physical model of a crunch sound. It is one of the PhISEM percussion opcodes. PhISEM (Physically Informed Stochastic Event Modeling) is an algorithmic approach for simulating collisions of multiple independent sound producing objects. </p> </div> <div class="refsect1"> <a id="idm281472943744600"></a> <h2>Syntax</h2> <pre class="synopsis">ares <span class="command"><strong>crunch</strong></span> iamp, idettack [, inum] [, idamp] [, imaxshake]</pre> </div> <div class="refsect1"> <a id="idm281472943742328"></a> <h2>Initialization</h2> <p> <span class="emphasis"><em>iamp</em></span> -- Amplitude of output. Note: As these instruments are stochastic, this is only a approximation. </p> <p> <span class="emphasis"><em>idettack</em></span> -- period of time over which all sound is stopped </p> <p> <span class="emphasis"><em>inum</em></span> (optional) -- The number of beads, teeth, bells, timbrels, etc. If zero, the default value is 7. </p> <p> <span class="emphasis"><em>idamp</em></span> (optional) -- the damping factor, as part of this equation: </p> <div class="literallayout"> <p>damping_amount = 0.998 + (idamp * 0.002)</p> </div> <p> </p> <p> The default <span class="emphasis"><em>damping_amount</em></span> is 0.99806 which means that the default value of <span class="emphasis"><em>idamp</em></span> is 0.03. The maximum <span class="emphasis"><em>damping_amount</em></span> is 1.0 (no damping). This means the maximum value for <span class="emphasis"><em>idamp</em></span> is 1.0. </p> <p> The recommended range for <span class="emphasis"><em>idamp</em></span> is usually below 75% of the maximum value. </p> <p> <span class="emphasis"><em>imaxshake</em></span> (optional) -- amount of energy to add back into the system. The value should be in range 0 to 1. </p> </div> <div class="refsect1"> <a id="idm281472943732120"></a> <h2>Examples</h2> <p> Here is an example of the crunch opcode. It uses the file <a class="ulink" href="examples/crunch.csd" target="_top"><em class="citetitle">crunch.csd</em></a>. </p> <div class="example"> <a id="idm281472943730344"></a> <p class="title"> <strong>Example 174. Example of the crunch 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="idm281472776860120"></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">;;;RT 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 crunch.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> a<span class="n">sig</span> <span class="nb">crunch</span> <span class="mf">0.8</span><span class="p">,</span> <span class="mf">0.1</span><span class="p">,</span> <span class="mi">7</span><span class="p">,</span> <span class="nb">p4</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">i</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">1</span> <span class="mf">.9</span> <span class="nb">i</span><span class="mi">1</span> <span class="mi">1</span> <span class="mi">1</span> <span class="mf">.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="idm281472943726120"></a> <h2>See Also</h2> <p> <a class="link" href="cabasa.html" title="cabasa"><em class="citetitle">cabasa</em></a>, <a class="link" href="sandpaper.html" title="sandpaper"><em class="citetitle">sandpaper</em></a>, <a class="link" href="sekere.html" title="sekere"><em class="citetitle">sekere</em></a>, <a class="link" href="stix.html" title="stix"><em class="citetitle">stix</em></a> </p> </div> <div class="refsect1"> <a id="idm281472943721128"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Author: Perry Cook, part of the PhOLIES (Physically-Oriented Library of Imitated Environmental Sounds)</td> </tr> <tr> <td>Adapted by 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 4.07</p> <p>Added notes by Rasmus Ekman on May 2002.</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="crossfm.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="ctrl14.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">crossfm </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> ctrl14</td> </tr> </table> </div> </body> </html>