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<refentry id="fractalnoise">
<indexterm id="IndexFractalNoise"><primary>fractalnoise</primary></indexterm>
<refentryinfo><title>Signal Generators:Random (Noise) Generators</title></refentryinfo>
<refmeta>
<refentrytitle>fractalnoise</refentrytitle>
</refmeta>
<refnamediv>
<refname>fractalnoise</refname>
<refpurpose>
A fractal noise generator.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
A fractal noise generator implemented as a white noise filtered
by a cascade of 15 first-order filters.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>ares <command>fractalnoise</command> kamp, kbeta</synopsis>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>kamp</emphasis> -- amplitude.
</para>
<para>
<emphasis>kbeta</emphasis> -- spectral parameter related to the fractal dimension
<itemizedlist>
<listitem><para>0 - white</para></listitem>
<listitem><para>1 - pink</para></listitem>
<listitem><para>2 - brown</para></listitem>
</itemizedlist>
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Here is an example of the fractalnoise opcode. It uses the file <ulink url="examples/fractalnoise.csd"><citetitle>fractalnoise.csd</citetitle></ulink>.
<example>
<title>Example of the fractalnoise opcode.</title>
<para>See the sections <link linkend="UsingRealTime"><citetitle>Real-time Audio</citetitle></link> and <link linkend="CommandFlags"><citetitle>Command Line Flags</citetitle></link> for more information on using command line flags.</para>
<xi:include href="examples-xml/fractalnoise.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
</para>
</refsect1>
<refsect1>
<title>References</title>
<para>
<orderedlist>
<listitem>
<para>
R. Saletti. A comparison between two methods to generate
1/(f^gamma) noise. In Proc. IEEE, volume 74,
pp. 1595-1596, November 1986.
</para>
</listitem>
<listitem>
<para>
G. Corsini and R. Saletti. A 1/(f^gamma) power spectrum
noise sequence generator. IEEE Trans. on Instrumentation
and Measurement, 37(4):615-619, December 1988.
</para>
</listitem>
<listitem>
<para>
The Sounding Object, edited by Davide Rocchesso and
Federico Fontana, Edizioni di Mondo Estremo. Chapter 8 by
Federico Avanzini, pp. 154-157.
</para>
</listitem>
</orderedlist>
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: &nametito;</member>
<member>January 2012</member>
</simplelist>
</para>
<para>New in Csound version 5.16</para>
</refsect1>
</refentry>
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