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<refentry id="ATSaddnz">
<indexterm id="IndexATSaddnz"><primary>ATSaddnz</primary></indexterm>
<refentryinfo><title>Spectral Processing:ATS</title></refentryinfo>
<refmeta>
<refentrytitle>ATSaddnz</refentrytitle>
</refmeta>
<refnamediv>
<refname>ATSaddnz</refname>
<refpurpose> uses the data from an ATS analysis file to perform noise resynthesis.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
<emphasis>ATSaddnz</emphasis> reads from an ATS analysis file and uses the data to perform additive synthesis using a modified randi function.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>ar <command>ATSaddnz</command> ktimepnt, iatsfile, ibands[, ibandoffset, ibandincr]</synopsis>
</refsect1>
<refsect1>
<title>Initialization</title>
<para>
<emphasis>iatsfile</emphasis> – the ATS number (n in ats.n) or the name in quotes of the analysis file made using <ulink url="http://www-ccrma.stanford.edu/~juan/ATS.html"><citetitle>ATS</citetitle></ulink>.
</para>
<para><emphasis>ibands</emphasis> – number of noise bands that will be used in the resynthesis (the noise has a maximum of 25 bands)
</para>
<para><emphasis>ibandoffset</emphasis> (optional) – is the first noise band used (defaults to 0).
</para>
<para><emphasis>ibandincr</emphasis> (optional) – sets an increment by which these synthesis opcodes counts up from <emphasis>ibandoffset</emphasis> for ibins components in the re-synthesis (defaults to 1).
</para>
</refsect1>
<refsect1>
<title>Performance</title>
<para><emphasis>ktimepnt</emphasis> – The time pointer in seconds used to index the ATS file. Used for <emphasis>ATSaddnz</emphasis> exactly the same as for <link linkend="pvoc"><citetitle>pvoc</citetitle></link> and <link linkend="ATSadd"><citetitle>ATSadd</citetitle></link>.</para>
<para><emphasis>ATSaddnz</emphasis> and <link linkend="ATSadd"><citetitle>ATSadd</citetitle></link> are based on <link linkend="pvadd"><citetitle>pvadd</citetitle></link> by Richard Karpen and use files created by Juan Pampin's ATS (<ulink url="http://www-ccrma.stanford.edu/~juan/ATS.html"><citetitle>Analysis - Transformation - Synthesis</citetitle></ulink>).
</para>
<para><emphasis>ATSaddnz</emphasis> also reads from an ATS file but it resynthesizes the noise from noise energy data contained in the ATS file. It uses a modified randi function to create band limited noise and modulates that with a cosine wave, to synthesize a user specified selection of frequency bands. Modulating the noise is required to put the band limited noise in the correct place in the frequency spectrum.
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<programlisting> ktime line 0, p3, 2.5
asig atsaddnz ktime, "clarinet.ats", 25
</programlisting>
<para>In the example above we're synthesizing all 25 noise bands from the data contained in the ATS analysis file called "clarinet.ats".
</para>
<programlisting> ktime line 2.5, p3, 0
asig atsaddnz ktime, 1, "clarinet.ats", 1, 24
</programlisting>
<para>Here we synthesize only the 25th noise band (<emphasis>ibandoffset</emphasis> of 24 and <emphasis>ibands</emphasis> of 1). Also our time pointer is going from 2.5 to 0 over the duration of the note so we're reading backwards from 2.5 seconds in the analysis file.
</para>
</refsect1>
<refsect1>
<title>See also</title>
<para><link linkend="ATSread"><citetitle>ATSread</citetitle></link>,
<link linkend="ATSreadnz"><citetitle>ATSreadnz</citetitle></link>,
<link linkend="ATSinfo"><citetitle>ATSinfo</citetitle></link>,
<link linkend="ATSbufread"><citetitle>ATSbufread</citetitle></link>,
<link linkend="ATScross"><citetitle>ATScross</citetitle></link>,
<link linkend="ATSinterpread"><citetitle>ATSinterpread</citetitle></link>,
<link linkend="ATSpartialtap"><citetitle>ATSpartialtap</citetitle></link>,
<link linkend="ATSaddnz"><citetitle>ATSaddnz</citetitle></link>,
<link linkend="ATSsinnoi"><citetitle>ATSsinnoi</citetitle></link></para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: Alex Norman</member>
<member>Seattle,Washington</member>
<member>2004</member>
</simplelist>
</para>
</refsect1>
</refentry>
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