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<div class="refentry" title="tradsyn">
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<h2>
<span class="refentrytitle">tradsyn</span>
</h2>
<p>tradsyn —
Streaming partial track additive synthesis
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp49229008"></a>
<h2>Description</h2>
<p>
The <span class="emphasis"><em>tradsyn</em></span> opcode takes an input containg a TRACKS pv streaming signal (as generated,
for instance by <span class="emphasis"><em>partials</em></span>),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>
</div>
<div class="refsect1" title="Syntax">
<a id="idp49267048"></a>
<h2>Syntax</h2>
<pre class="synopsis">asig <span class="command"><strong>tradsyn</strong></span> fin, kscal, kpitch, kmaxtracks, ifn</pre>
</div>
<div class="refsect1" title="Performance">
<a id="idp49268168"></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>
</div>
<div class="refsect1" title="Examples">
<a id="idp49271416"></a>
<h2>Examples</h2>
<p>
Here is an example of the tradsyn opcode. It uses the file <a class="ulink" href="examples/tradsyn.csd" target="_top"><em class="citetitle">tradsyn.csd</em></a>.
</p>
<div class="example">
<a id="idp49272392"></a>
<p class="title">
<strong>Example 891. Example of the tradsyn opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o tradsyn.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="oblock">instr</span> 1
ipch <span class="op">=</span> p4
ain <span class="opc">diskin2</span> "beats.wav", 1
fs1,fsi2 <span class="opc">pvsifd</span> ain,2048,512,1 <span class="comment">; ifd analysis</span>
fst <span class="opc">partials</span> fs1,fsi2,.003,1,3,500 <span class="comment">; partial tracking</span>
aout <span class="opc">tradsyn</span> fst, 1, ipch, 500, 1 <span class="comment">; resynthesis</span>
<span class="opc">outs</span> aout, aout
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">f</span>1 0 8192 10 1
<span class="stamnt">i</span> 1 0 2 1.5 <span class="comment">;up a 5th</span>
<span class="stamnt">i</span> 1 + 2 .5 <span class="comment">;octave down</span>
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</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="idp49275008"></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>
</table>
<p>
</p>
<p>New plugin in version 5</p>
<p>November 2004.</p>
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