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<refentry id="tradsyn">
<indexterm id="Indextradsyn"><primary>tradsyn</primary></indexterm>
<refentryinfo><title>Spectral Processing:Streaming</title></refentryinfo>
<refmeta>
<refentrytitle>tradsyn</refentrytitle>
</refmeta>
<refnamediv>
<refname>tradsyn</refname>
<refpurpose>
Streaming partial track additive synthesis
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
The tradsyn opcode takes an input containg a TRACKS pv streaming signal (as generated,
for instance by partials),as described in Lazzarini et al, "Time-stretching using the Instantaneous Frequency Distribution and Partial
Tracking", Proc.of ICMC05, Barcelona. It resynthesises the signal using linear amplitude and frequency
interpolation to drive a bank of interpolating oscillators with amplitude and pitch scaling controls.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>asig <command>tradsyn</command> fin, kscal, kpitch, kmaxtracks, ifn</synopsis>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>asig</emphasis> -- output audio rate signal
</para>
<para>
<emphasis>fin</emphasis> -- input pv stream in TRACKS format
</para>
<para>
<emphasis>kscal</emphasis> -- amplitude scaling
</para>
<para>
<emphasis>kpitch</emphasis> -- pitch scaling
</para>
<para>
<emphasis>kmaxtracks</emphasis> -- max number of tracks in resynthesis. Limiting this will cause
a non-linear filtering effect, by discarding newer and higher-frequency tracks (tracks are ordered
by start time and ascending frequency, respectively)
</para>
<para>
<emphasis>ifn</emphasis> -- function table containing one cycle of a sinusoid (sine or cosine) </para>
<para>
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
<example>
<title>Example</title>
<programlisting>
ain inch 1 ; input signal
fs1,fsi2 pvsifd ain,2048,512,1 ; ifd analysis
fst partials fs1,fsi2,.003,1,3,500 ; partial tracking
aout tradsyn fst, 1, 1.5, 500, 1 ; resynthesis (up a 5th)
out aout
</programlisting>
</example>
</para>
<para>
The example above shows partial tracking of an ifd-analysis signal and
linear additive resynthesis with pitch shifting.
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: &namevictor;</member>
<member>June 2005 </member>
</simplelist>
</para>
<para>New plugin in version 5</para>
<para>November 2004.</para>
</refsect1>
</refentry>
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