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<refentry id="spechist">
<indexterm id="IndexSpechist"><primary>spechist</primary></indexterm>
<refentryinfo><title>Spectral Processing:Non-Standard</title></refentryinfo>
<refmeta>
<refentrytitle>spechist</refentrytitle>
</refmeta>
<refnamediv>
<refname>spechist</refname>
<refpurpose>
Accumulates the values of successive spectral frames.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Accumulates the values of successive spectral frames.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>wsig <command>spechist</command> wsigin</synopsis>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>wsigin</emphasis> -- the input spectra.
</para>
<para>
Accumulates the values of successive spectral frames. At each new frame of <emphasis>wsigin</emphasis>, the accumulations-to-date in each magnitude track are written to the output spectrum. This unit thus provides a running <emphasis>histogram</emphasis> of spectral distribution.
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
<informalexample>
<programlisting>
wsig2 <emphasis>specdiff</emphasis> wsig1 ; sense onsets
wsig3 <emphasis>specfilt</emphasis> wsig2, 2 ; absorb slowly
<emphasis>specdisp</emphasis> wsig2, .1 ; & display both spectra
<emphasis>specdisp</emphasis> wsig3, .1
</programlisting>
</informalexample>
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<link linkend="specaddm"><citetitle>specaddm</citetitle></link>,
<link linkend="specdiff"><citetitle>specdiff</citetitle></link>,
<link linkend="specfilt"><citetitle>specfilt</citetitle></link>,
<link linkend="specscal"><citetitle>specscal</citetitle></link>
</para>
</refsect1>
</refentry>
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