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<h2>
<span class="refentrytitle">pvsarp</span>
</h2>
<p>pvsarp —
Arpeggiate the spectral components of a streaming pv signal.
</p>
</div>
<div class="refsect1">
<a id="idm281472900195320"></a>
<h2>Description</h2>
<p>
This opcode arpeggiates spectral components, by amplifying one bin and attenuating
all the others around it. Used with an LFO it will provide a spectral arpeggiator similar to Trevor Wishart's
CDP program specarp.
</p>
</div>
<div class="refsect1">
<a id="idm281472900151512"></a>
<h2>Syntax</h2>
<pre class="synopsis">fsig <span class="command"><strong>pvsarp</strong></span> fsigin, kbin, kdepth, kgain</pre>
</div>
<div class="refsect1">
<a id="idm281472900149352"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>fsig</em></span> -- output pv stream
</p>
<p>
<span class="emphasis"><em>fsigin</em></span> -- input pv stream
</p>
<p>
<span class="emphasis"><em>kbin</em></span> -- target bin, normalised 0 - 1 (0Hz - Nyquist).
</p>
<p>
<span class="emphasis"><em>kdepth</em></span> -- depth of attenuation of surrounding bins
</p>
<p>
<span class="emphasis"><em>kgain</em></span> -- gain boost applied to target bin
</p>
<div class="warning" style="margin-left: 0.5in; margin-right: 0.5in;">
<table border="0" summary="Warning">
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<td rowspan="2" align="center" valign="top" width="25">
<img alt="[Warning]" src="images/warning.png" />
</td>
<th align="left">Warning</th>
</tr>
<tr>
<td align="left" valign="top">
<p>
It is unsafe to use the same f-variable for both input and output of pvs opcodes. Using the same one might lead to undefined behavior on some opcodes. Use a different one on the left and right sides of the opcode.
</p>
</td>
</tr>
</table>
</div>
</div>
<div class="refsect1">
<a id="idm281472900143256"></a>
<h2>Examples</h2>
<p>
Here is an example of the pvsarp opcode. It uses the file <a class="ulink" href="examples/pvsarp.csd" target="_top"><em class="citetitle">pvsarp.csd</em></a>
</p>
<div class="example">
<a id="idm281472900141512"></a>
<p class="title">
<strong>Example 739. Example of the pvsarp 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="idm281472721484408"></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>
<span class="c1">; Audio out Audio in No messages</span>
-odac -iadc <span class="c1">;;;-d RT audio I/O</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o pvsarp.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="c1">; Initialize the global variables.</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">100</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</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>
a<span class="n">sig</span> <span class="nb">in</span> <span class="c1">; get the signal in</span>
i<span class="n">depth</span> <span class="o">=</span> <span class="nb">p4</span>
<span class="n">fsig</span> <span class="nb">pvsanal</span> a<span class="n">sig</span><span class="p">,</span> <span class="mi">1024</span><span class="p">,</span> <span class="mi">256</span><span class="p">,</span> <span class="mi">1024</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">; analyse it</span>
k<span class="n">bin</span> <span class="nb">oscili</span> <span class="mf">0.1</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">; ftable 1 in the 0-1 range</span>
<span class="n">ftps</span> <span class="nb">pvsarp</span> <span class="n">fsig</span><span class="p">,</span> k<span class="n">bin</span><span class="o">+</span><span class="mf">0.01</span><span class="p">,</span> i<span class="n">depth</span><span class="p">,</span> <span class="mi">2</span> <span class="c1">; arpeggiate it (range 220.5 - 2425.5)</span>
a<span class="n">tps</span> <span class="nb">pvsynth</span> <span class="n">ftps</span> <span class="c1">; synthesise it</span>
<span class="nb">out</span> a<span class="n">tps</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">4096</span> <span class="mi">10</span> <span class="mi">1</span> <span class="c1">;sine wave</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">10</span> <span class="mf">0.9</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="o">+</span> <span class="mi">10</span> <span class="mf">0.5</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>
Here is another example of the pvsarp opcode. It uses the file <a class="ulink" href="examples/pvsarp2.csd" target="_top"><em class="citetitle">pvsarp2.csd</em></a>
</p>
<div class="example">
<a id="idm281472900136248"></a>
<p class="title">
<strong>Example 740. Example of the pvsarp 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="idm281472721275352"></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>
<span class="c1">; Audio out Audio in</span>
-odac <span class="c1">;;;RT audio I/O</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o pvsarp2.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">16</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="c1">;; example written by joachim heintz 2009</span>
<span class="kd">instr</span> <span class="nf">1</span>
i<span class="n">fftsize</span> <span class="o">=</span> <span class="mi">1024</span>
i<span class="n">overlap</span> <span class="o">=</span> i<span class="n">fftsize</span> <span class="o">/</span> <span class="mi">4</span>
i<span class="n">winsize</span> <span class="o">=</span> i<span class="n">fftsize</span>
i<span class="n">winshape</span> <span class="o">=</span> <span class="mi">1</span><span class="c1">; von-Hann window</span>
S<span class="n">file1</span> <span class="o">=</span> <span class="s">"fox.wav"</span>
a<span class="n">in1</span> <span class="nb">soundin</span> S<span class="n">file1</span>
<span class="n">fftin</span> <span class="nb">pvsanal</span> a<span class="n">in1</span><span class="p">,</span> i<span class="n">fftsize</span><span class="p">,</span> i<span class="n">overlap</span><span class="p">,</span> i<span class="n">winsize</span><span class="p">,</span> i<span class="n">winshape</span>
<span class="c1">;make 3 independently moving accentuations in the spectrum</span>
k<span class="n">bin1</span> <span class="nb">linseg</span> <span class="mf">0.05</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span> <span class="mf">.05</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span> <span class="mf">.05</span>
<span class="n">farp1</span> <span class="nb">pvsarp</span> <span class="n">fftin</span><span class="p">,</span> k<span class="n">bin1</span><span class="p">,</span> <span class="mf">.9</span><span class="p">,</span> <span class="mi">10</span>
k<span class="n">bin2</span> <span class="nb">linseg</span> <span class="mf">0.075</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span> <span class="mf">.1</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span> <span class="mf">.075</span>
<span class="n">farp2</span> <span class="nb">pvsarp</span> <span class="n">fftin</span><span class="p">,</span> k<span class="n">bin2</span><span class="p">,</span> <span class="mf">.9</span><span class="p">,</span> <span class="mi">10</span>
k<span class="n">bin3</span> <span class="nb">linseg</span> <span class="mf">0.02</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span> <span class="mf">.03</span><span class="p">,</span> <span class="nb">p3</span><span class="o">/</span><span class="mi">2</span><span class="p">,</span> <span class="mf">.04</span>
<span class="n">farp3</span> <span class="nb">pvsarp</span> <span class="n">fftin</span><span class="p">,</span> k<span class="n">bin3</span><span class="p">,</span> <span class="mf">.9</span><span class="p">,</span> <span class="mi">10</span>
<span class="c1">;resynthesize and add them</span>
a<span class="n">out1</span> <span class="nb">pvsynth</span> <span class="n">farp1</span>
a<span class="n">out2</span> <span class="nb">pvsynth</span> <span class="n">farp2</span>
a<span class="n">out3</span> <span class="nb">pvsynth</span> <span class="n">farp3</span>
a<span class="n">out</span> <span class="o">=</span> a<span class="n">out1</span><span class="o">*</span><span class="mf">.3</span> <span class="o">+</span> a<span class="n">out2</span><span class="o">*</span><span class="mf">.3</span> <span class="o">+</span> a<span class="n">out3</span><span class="o">*</span><span class="mf">.3</span>
<span class="nb">out</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">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">3</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>
</div>
<div class="refsect1">
<a id="idm281472900131960"></a>
<h2>See Also</h2>
<p>
<a class="link" href="pvsanal.html" title="pvsanal"><em class="citetitle">pvsanal</em></a>,
<a class="link" href="pvsynth.html" title="pvsynth"><em class="citetitle">pvsynth</em></a>,
<a class="link" href="pvsadsyn.html" title="pvsadsyn"><em class="citetitle">pvsadsyn</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472900127992"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Victor Lazzarini</td>
</tr>
<tr>
<td>April 2005 </td>
</tr>
</table>
<p>
</p>
<p>New plugin in version 5</p>
<p>April 2005.</p>
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