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<h2>
<span class="refentrytitle">cmplxprod</span>
</h2>
<p>cmplxprod —
Complex product of two arrays.
</p>
</div>
<div class="refsect1">
<a id="idm281472946200776"></a>
<h2>Description</h2>
<p>
Calculates the complex product of two arrays of the same size and in real-imaginary interleaved format.
</p>
</div>
<div class="refsect1">
<a id="idm281472946197320"></a>
<h2>Syntax</h2>
<pre class="synopsis">kout[] <span class="command"><strong>cmplxprod</strong></span> kin1[], kin2[]</pre>
</div>
<div class="refsect1">
<a id="idm281472946195112"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kout[]</em></span> -- output array containing the product. It will be created if it does not exist.
</p>
<p>
<span class="emphasis"><em>kin1[], kin2[]</em></span> -- input arrays containing the complex inputs.
</p>
</div>
<div class="refsect1">
<a id="idm281472946192488"></a>
<h2>Examples</h2>
<p>
Here is an example of the cmplxprod opcode. It uses the file <a class="ulink" href="examples/cmplxprod.csd" target="_top"><em class="citetitle">cmplxprod.csd</em></a>.</p>
<div class="example">
<a id="idm281472946129224"></a>
<p class="title">
<strong>Example 136. Example of the cmplxprod 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="idm281472779486056"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
-d -o dac
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="c1">;ksmps needs to be an integer div of hopsize </span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">64</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>
i<span class="n">hopsize</span> <span class="o">=</span> <span class="mi">256</span> <span class="c1">; hopsize</span>
i<span class="n">fftsize</span> <span class="o">=</span> <span class="mi">1024</span> <span class="c1">; FFT size </span>
i<span class="n">olaps</span> <span class="o">=</span> i<span class="n">fftsize</span><span class="o">/</span>i<span class="n">hopsize</span> <span class="c1">; overlaps</span>
i<span class="n">bw</span> <span class="o">=</span> <span class="vg">sr</span><span class="o">/</span>i<span class="n">fftsize</span> <span class="c1">; bin bandwidth</span>
k<span class="n">cnt</span> <span class="nb">init</span> <span class="mi">0</span> <span class="c1">; counting vars</span>
k<span class="n">row</span> <span class="nb">init</span> <span class="mi">0</span>
k<span class="n">Ola</span><span class="p">[]</span> <span class="nb">init</span> i<span class="n">fftsize</span> <span class="c1">; overlap-add buffer</span>
k<span class="n">In</span><span class="p">[]</span> <span class="nb">init</span> i<span class="n">fftsize</span> <span class="c1">; input buffer</span>
k<span class="n">Fil</span><span class="p">[]</span> <span class="nb">init</span> i<span class="n">fftsize</span> <span class="c1">; filter buffer</span>
k<span class="n">Out</span><span class="p">[][]</span> <span class="nb">init</span> i<span class="n">olaps</span><span class="p">,</span> i<span class="n">fftsize</span> <span class="c1">; output buffers</span>
k<span class="n">frst</span> <span class="nb">init</span> <span class="mi">1</span>
<span class="k">if</span> k<span class="n">frst</span> <span class="o">==</span> <span class="mi">1</span> <span class="k">then</span>
<span class="nb">copyf2array</span> k<span class="n">Fil</span><span class="p">,</span><span class="mi">1</span>
k<span class="n">frst</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">endif</span>
a<span class="n">1</span> <span class="nb">diskin2</span> <span class="s">"fox.wav"</span><span class="p">,</span><span class="mi">1</span><span class="p">,</span><span class="mi">0</span><span class="p">,</span><span class="mi">1</span> <span class="c1">; audio input</span>
<span class="cm">/* every hopsize samples */</span>
<span class="k">if</span> k<span class="n">cnt</span> <span class="o">==</span> i<span class="n">hopsize</span> <span class="k">then</span>
<span class="cm">/* window and take FFT */</span>
k<span class="n">Win</span><span class="p">[]</span> <span class="nb">window</span> k<span class="n">In</span><span class="p">,</span>k<span class="n">row</span><span class="o">*</span>i<span class="n">hopsize</span>
k<span class="n">Spec</span><span class="p">[]</span> <span class="nb">rfft</span> k<span class="n">Win</span>
k<span class="n">Prod</span><span class="p">[]</span> <span class="nb">cmplxprod</span> k<span class="n">Spec</span><span class="p">,</span> k<span class="n">Fil</span>
<span class="cm">/* IFFT + window */</span>
k<span class="n">Row</span><span class="p">[]</span> <span class="nb">rifft</span> k<span class="n">Prod</span>
k<span class="n">Win</span> <span class="nb">window</span> k<span class="n">Row</span><span class="p">,</span> k<span class="n">row</span><span class="o">*</span>i<span class="n">hopsize</span>
<span class="cm">/* place it on out buffer */</span>
k<span class="n">Out</span> <span class="nb">setrow</span> k<span class="n">Win</span><span class="p">,</span> k<span class="n">row</span>
<span class="cm">/* zero the ola buffer */</span>
k<span class="n">Ola</span> <span class="o">=</span> <span class="mi">0</span>
<span class="cm">/* overlap-add */</span>
k<span class="n">i</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">until</span> k<span class="n">i</span> <span class="o">==</span> i<span class="n">olaps</span> <span class="k">do</span>
k<span class="n">Row</span> <span class="nb">getrow</span> k<span class="n">Out</span><span class="p">,</span> k<span class="n">i</span>
k<span class="n">Ola</span> <span class="o">=</span> k<span class="n">Ola</span> <span class="o">+</span> k<span class="n">Row</span>
k<span class="n">i</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">od</span>
<span class="cm">/* update counters */</span>
k<span class="n">row</span> <span class="o">=</span> <span class="p">(</span>k<span class="n">row</span><span class="o">+</span><span class="mi">1</span><span class="p">)</span><span class="o">%</span>i<span class="n">olaps</span>
k<span class="n">cnt</span> <span class="o">=</span> <span class="mi">0</span>
<span class="k">endif</span>
<span class="cm">/* shift audio in/out of buffers */</span>
k<span class="n">In</span> <span class="nb">shiftin</span> a<span class="n">1</span>
a<span class="n">2</span> <span class="nb">shiftout</span> k<span class="n">Ola</span>
<span class="nb">out</span> a<span class="n">2</span><span class="o">/</span>i<span class="n">olaps</span>
<span class="cm">/* increment counter */</span>
k<span class="n">cnt</span> <span class="o">+=</span> <span class="vg">ksmps</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">1024</span> <span class="mi">7</span> <span class="mi">0</span> <span class="mi">64</span> <span class="mf">0.1</span> <span class="mi">64</span> <span class="mf">0.2</span> <span class="mi">128</span> <span class="mf">0.5</span> <span class="mi">256</span> <span class="mi">1</span> <span class="mi">512</span> <span class="mi">1</span>
<span class="nb">i</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">10</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<br class="example-break" />
</div>
<div class="refsect1">
<a id="idm281472946125160"></a>
<h2>See Also</h2>
<p>
<a class="link" href="vectorial.html" title="Vectorial Opcodes"><em class="citetitle"></em>Vectorial opcodes</a>,
<a class="link" href="arrayOpcodes.html" title="Array Opcodes"><em class="citetitle"></em>array opcodes</a>
</p>
</div>
<div class="refsect1">
<a id="idm281472946122152"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Victor Lazzarini</td>
</tr>
<tr>
<td>NUI Maynooth</td>
</tr>
<tr>
<td>2014</td>
</tr>
</table>
<p>
</p>
<p>New in version 6.04</p>
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