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<h2>
<span class="refentrytitle">sinsyn</span>
</h2>
<p>sinsyn —
Streaming partial track additive synthesis with cubic phase interpolation
</p>
</div>
<div class="refsect1">
<a id="idm281472889900632"></a>
<h2>Description</h2>
<p>
The <span class="emphasis"><em>sinsyn</em></span> opcode takes an input containg a TRACKS pv streaming signal (as generated,
for instance by the <span class="emphasis"><em>partials</em></span> opcode). It resynthesises the signal using linear amplitude and cubic phase
interpolation to drive a bank of interpolating oscillators with amplitude scaling control. <span class="emphasis"><em>sinsyn</em></span>
attempts to preserve the phase of the partials in the original signal and in so doing it does not allow for
pitch or timescale modifications of the signal.
</p>
</div>
<div class="refsect1">
<a id="idm281472889832200"></a>
<h2>Syntax</h2>
<pre class="synopsis">asig <span class="command"><strong>sinsyn</strong></span> fin, kscal, kmaxtracks, ifn</pre>
</div>
<div class="refsect1">
<a id="idm281472889829976"></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>kmaxtracks</em></span> -- max number of tracks in sinsynthesis. 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">
<a id="idm281472889824728"></a>
<h2>Examples</h2>
<p>
Here is an example of the sinsyn opcode. It uses the file <a class="ulink" href="examples/sinsyn.csd" target="_top"><em class="citetitle">sinsyn.csd</em></a>.
</p>
<div class="example">
<a id="idm281472889822952"></a>
<p class="title">
<strong>Example 898. Example of the sinsyn 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>
<div class="refsect1">
<a id="idm281472710087112"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
-odac <span class="c1">;;;realtime audio out</span>
<span class="c1">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o sinsyn.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">32</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="kd">instr</span> <span class="nf">1</span>
k<span class="n">mxtr</span> <span class="nb">init</span> <span class="nb">p4</span>
a<span class="n">in</span> <span class="nb">diskin2</span> <span class="s">"fox.wav"</span><span class="p">,</span> <span class="mi">1</span>
<span class="n">fs1</span><span class="p">,</span><span class="n">fsi2</span> <span class="nb">pvsifd</span> a<span class="n">in</span><span class="p">,</span> <span class="mi">2048</span><span class="p">,</span> <span class="mi">512</span><span class="p">,</span><span class="mi">1</span> <span class="c1">; ifd analysis</span>
<span class="n">fst</span> <span class="nb">partials</span> <span class="n">fs1</span><span class="p">,</span> <span class="n">fsi2</span><span class="p">,</span> <span class="mf">.03</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">500</span> <span class="c1">; partial tracking</span>
a<span class="n">out</span> <span class="nb">sinsyn</span> <span class="n">fst</span><span class="p">,</span> <span class="mf">.5</span><span class="p">,</span> k<span class="n">mxtr</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">; scale amplitude down</span>
<span class="nb">outs</span> a<span class="n">out</span><span class="p">,</span> a<span class="n">out</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">f</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">8192</span> <span class="mi">10</span> <span class="mi">1</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mf">2.7</span> <span class="mi">15</span> <span class="c1">;filtering effect by using low number of tracks</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="o">+</span> <span class="mf">2.7</span> <span class="mi">500</span> <span class="c1">;maximum number of tracks</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
</p>
<p>The example above shows partial tracking of an ifd-analysis signal and cubic-phase additive resynthesis.</p>
</div>
<div class="refsect1">
<a id="idm281472889818152"></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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