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<span class="refentrytitle">tradsyn</span>
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<p>tradsyn —
Streaming partial track additive synthesis
</p>
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<div class="refsect1" title="Description">
<a id="id3298038"></a>
<h2>Description</h2>
<p>
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.
</p>
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<div class="refsect1" title="Syntax">
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<h2>Syntax</h2>
<pre class="synopsis">asig <span class="command"><strong>tradsyn</strong></span> fin, kscal, kpitch, kmaxtracks, ifn</pre>
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<div class="refsect1" title="Performance">
<a id="id3298085"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>asig</em></span> -- output audio rate signal
</p>
<p>
<span class="emphasis"><em>fin</em></span> -- input pv stream in TRACKS format
</p>
<p>
<span class="emphasis"><em>kscal</em></span> -- amplitude scaling
</p>
<p>
<span class="emphasis"><em>kpitch</em></span> -- pitch scaling
</p>
<p>
<span class="emphasis"><em>kmaxtracks</em></span> -- 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)
</p>
<p>
<span class="emphasis"><em>ifn</em></span> -- function table containing one cycle of a sinusoid (sine or cosine) </p>
<p>
</p>
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<h2>Examples</h2>
<p>
</p>
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<a id="id3298977"></a>
<p class="title">
<b>Example 630. Example</b>
</p>
<div class="example-contents">
<pre class="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
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
<p>
The example above shows partial tracking of an ifd-analysis signal and
linear additive resynthesis with pitch shifting.
</p>
</div>
<div class="refsect1" title="Credits">
<a id="id3299001"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Victor Lazzarini</td>
</tr>
<tr>
<td>June 2005 </td>
</tr>
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<p>
</p>
<p>New plugin in version 5</p>
<p>November 2004.</p>
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