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<refentry id="specaddm">
<indexterm id="IndexSpecaddm"><primary>specaddm</primary></indexterm>
<refentryinfo><title>Spectral Processing:Non-Standard</title></refentryinfo>
<refmeta>
<refentrytitle>specaddm</refentrytitle>
</refmeta>
<refnamediv>
<refname>specaddm</refname>
<refpurpose>
Perform a weighted add of two input spectra.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Perform a weighted add of two input spectra.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>wsig <command>specaddm</command> wsig1, wsig2 [, imul2]</synopsis>
</refsect1>
<refsect1>
<title>Initialization</title>
<para>
<emphasis>imul2</emphasis> (optional, default=0) -- if non-zero, scale the <emphasis>wsig2</emphasis> magnitudes before adding. The default value is 0.
</para>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>wsig1</emphasis> -- the first input spectra.
</para>
<para>
<emphasis>wsig2</emphasis> -- the second input spectra.
</para>
<para>
Do a weighted add of two input spectra. For each channel of the two input spectra, the two magnitudes are combined and written to the output according to:
<literallayout>
magout = mag1in + mag2in * imul2
</literallayout>
</para>
<para>
The operation is performed whenever the input <emphasis>wsig1</emphasis> is sensed to be new. This unit will (at Initialization) verify the consistency of the two spectra (equal size, equal period, equal mag types).
</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="specdiff"><citetitle>specdiff</citetitle></link>,
<link linkend="specfilt"><citetitle>specfilt</citetitle></link>,
<link linkend="spechist"><citetitle>spechist</citetitle></link>,
<link linkend="specscal"><citetitle>specscal</citetitle></link>
</para>
</refsect1>
</refentry>
|
