<?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>gendyc</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="gendy.html" title="gendy" /> <link rel="next" href="gendyx.html" title="gendyx" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">gendyc</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="gendy.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="gendyx.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="gendyc"></a> <div class="titlepage"></div> <a id="IndexGendyc" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">gendyc</span> </h2> <p>gendyc — Dynamic stochastic approach to waveform synthesis using cubic interpolation. </p> </div> <div class="refsect1"> <a id="idm281472927317880"></a> <h2>Description</h2> <p> Implementation with cubic interpolation of the <span class="emphasis"><em>Génération Dynamique Stochastique</em></span> (GENDYN), a dynamic stochastic approach to waveform synthesis conceived by Iannis Xenakis. </p> </div> <div class="refsect1"> <a id="idm281472927273784"></a> <h2>Syntax</h2> <pre class="synopsis">ares <span class="command"><strong>gendyc</strong></span> kamp, kampdist, kdurdist, kadpar, kddpar, kminfreq, kmaxfreq, \ kampscl, kdurscl [, initcps] [, knum]</pre> <pre class="synopsis">kres <span class="command"><strong>gendyc</strong></span> kamp, kampdist, kdurdist, kadpar, kddpar, kminfreq, kmaxfreq, \ kampscl, kdurscl [, initcps] [, knum]</pre> </div> <div class="refsect1"> <a id="idm281472927270008"></a> <h2>Initialization</h2> <p> <span class="emphasis"><em>initcps</em></span> (optional, default=12) -- max number of control points. </p> </div> <div class="refsect1"> <a id="idm281472927268328"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>kamp</em></span> -- amplitude. </p> <p> <span class="emphasis"><em>kampdist</em></span> -- choice of probability distribution for the next perturbation of the amplitude of a control point. The valid distributions are: </p> <div class="itemizedlist"> <ul class="itemizedlist" style="list-style-type: disc; "> <li class="listitem"> <p>0 - LINEAR</p> </li> <li class="listitem"> <p>1 - CAUCHY</p> </li> <li class="listitem"> <p>2 - LOGIST</p> </li> <li class="listitem"> <p>3 - HYPERBCOS</p> </li> <li class="listitem"> <p>4 - ARCSINE</p> </li> <li class="listitem"> <p>5 - EXPON</p> </li> <li class="listitem"> <p>6 - SINUS (external k-rate signal)</p> </li> </ul> </div> <p> If <span class="emphasis"><em>kampdist</em></span>=6, the user can use an external k-rate signal through <span class="emphasis"><em>kadpar</em></span>. </p> <p> <span class="emphasis"><em>kdurdist</em></span> -- choice of distribution for the perturbation of the current inter control point duration. See <span class="emphasis"><em>kampdist</em></span> for the valid distributions. If <span class="emphasis"><em>kdurdist</em></span>=6, the user can use an external k-rate signal through <span class="emphasis"><em>kddpar</em></span>. </p> <p> <span class="emphasis"><em>kadpar</em></span> -- parameter for the <span class="emphasis"><em>kampdist</em></span> distribution. Should be in the range of 0.0001 to 1. </p> <p> <span class="emphasis"><em>kddpar</em></span> -- parameter for the <span class="emphasis"><em>kdurdist</em></span> distribution. Should be in the range of 0.0001 to 1. </p> <p> <span class="emphasis"><em>kminfreq</em></span> -- minimum allowed frequency of oscillation. </p> <p> <span class="emphasis"><em>kmaxfreq</em></span> -- maximum allowed frequency of oscillation. </p> <p> <span class="emphasis"><em>kampscl</em></span> -- multiplier for the distribution's delta value for amplitude (1.0 is full range). </p> <p> <span class="emphasis"><em>kdurscl</em></span> -- multiplier for the distribution's delta value for duration. </p> <p> <span class="emphasis"><em>knum</em></span> (optional, default=<span class="emphasis"><em>initcps</em></span>) -- current number of utilized control points. </p> <p> The waveform is generated by <span class="emphasis"><em>knum</em></span> - 1 segments and is repeated in the time. The vertexes (control points) are moved according to a stochastic action and they are limited within the boundaries of a mirror formed by an amplitude barrier and a time barrier. </p> </div> <div class="refsect1"> <a id="idm281472927249576"></a> <h2>Examples</h2> <p> Here is an example of the gendyc opcode. It uses the file <a class="ulink" href="examples/gendyc.csd" target="_top"><em class="citetitle">gendyc.csd</em></a>. </p> <div class="example"> <a id="idm281472927247720"></a> <p class="title"> <strong>Example 380. Example of the gendyc 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="idm281472757268776"></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 realtime audio input is needed too</span> <span class="c1">; For Non-realtime ouput leave only the line below:</span> <span class="c1">; -o oscil.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">out</span> <span class="nb">gendyc</span> <span class="mf">0.5</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">220</span><span class="p">,</span> <span class="mi">440</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="mf">0.5</span> <span class="nb">outs</span> a<span class="n">out</span><span class="p">,</span> a<span class="n">out</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">10</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="idm281472927243528"></a> <h2>References</h2> <p> </p> <div class="orderedlist"> <ol class="orderedlist" type="1"> <li class="listitem"> <p> Formalized Music (1992, Stuyvesant, NY: Pendragon Press), pp. 246 - 254, 289 - 322. </p> </li> </ol> </div> <p> </p> </div> <div class="refsect1"> <a id="idm281472927240584"></a> <h2>See Also</h2> <p> <a class="link" href="gendy.html" title="gendy"><em class="citetitle">gendy</em></a> <a class="link" href="gendyx.html" title="gendyx"><em class="citetitle">gendyx</em></a> </p> </div> <div class="refsect1"> <a id="idm281472927237544"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Based on Nick Collins's Gendy1 and Bhob Rainey's Gendy4 (SuperCollider)</td> </tr> <tr> <td>Author: Tito Latini</td> </tr> <tr> <td>January 2012</td> </tr> </table> <p> </p> <p>New in Csound version 5.16</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="gendy.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="gendyx.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">gendy </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> gendyx</td> </tr> </table> </div> </body> </html>