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<div class="refentry" title="poscil3">
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<h2>
<span class="refentrytitle">poscil3</span>
</h2>
<p>poscil3 —
High precision oscillator with cubic interpolation.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp36843352"></a>
<h2>Description</h2>
<p>
High precision oscillator with cubic interpolation.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp36844096"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>poscil3</strong></span> aamp, acps, ifn [, iphs]</pre>
<pre class="synopsis">ares <span class="command"><strong>poscil3</strong></span> aamp, kcps, ifn [, iphs]</pre>
<pre class="synopsis">ares <span class="command"><strong>poscil3</strong></span> kamp, acps, ifn [, iphs]</pre>
<pre class="synopsis">ares <span class="command"><strong>poscil3</strong></span> kamp, kcps, ifn [, iphs]</pre>
<pre class="synopsis">ires <span class="command"><strong>poscil3</strong></span> kamp, kcps, ifn [, iphs]</pre>
<pre class="synopsis">kres <span class="command"><strong>poscil3</strong></span> kamp, kcps, ifn [, iphs]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp36893744"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifn</em></span> -- function table number
</p>
<p>
<span class="emphasis"><em>iphs</em></span> (optional, default=0) -- initial phase (normalized table index 0-1)
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp36895176"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>ares</em></span> -- output signal
</p>
<p>
<span class="emphasis"><em>kamp</em></span>, <span class="emphasis"><em>aamp</em></span> -- the amplitude of the output signal.
</p>
<p>
<span class="emphasis"><em>kcps</em></span>, <span class="emphasis"><em>acps</em></span> -- the frequency of the output signal in cycles per second.
</p>
<p>
<span class="emphasis"><em>poscil3</em></span> works like <a class="link" href="poscil.html" title="poscil"><em class="citetitle">poscil</em></a>, but uses cubic interpolation.
</p>
<p>Note that <span class="emphasis"><em>poscil3</em></span> can use defered (non-power of two) length tables.</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp36898936"></a>
<h2>Examples</h2>
<p>
Here is an example of the poscil3 opcode. It uses the file <a class="ulink" href="examples/poscil3.csd" target="_top"><em class="citetitle">poscil3.csd</em></a>.
</p>
<div class="example">
<a id="idp36899920"></a>
<p class="title">
<strong>Example 606. Example of the poscil3 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 real audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o poscil3.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
giSine <span class="ohdr">ftgen</span> 0, 0, 2^10, 10, 1
<span class="oblock">instr</span> 1
krnd <span class="opc">randomh</span> 40, 440, 1 <span class="comment">; produce random values</span>
ain <span class="opc">poscil3</span> .6, krnd, giSine
kline <span class="opc">line</span> 1, p3, 0 <span class="comment">; straight line</span>
aL,aR <span class="opc">pan2</span> ain, kline <span class="comment">; sent across image</span>
<span class="opc">outs</span> aL, aR
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span>1 0 10
<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>
Here is another example of the poscil3 opcode, which uses a
table filled from a sound file. It uses the file
<a class="ulink" href="examples/poscil3-file.csd" target="_top">
<em class="citetitle">poscil3-file.csd</em>
</a>.
</p>
<div class="example">
<a id="idp36903248"></a>
<p class="title">
<strong>Example 607. Another example of the poscil3 opcode.</strong>
</p>
<div class="example-contents">
<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>
<span class="comment">; Audio out Audio in No messages</span>
-odac -iadc -d <span class="comment">;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o poscil3-file.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">; Example written by Joachim Heintz 07/2008</span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">kr</span> <span class="op">=</span> 4410
<span class="ohdr">ksmps</span> <span class="op">=</span> 10
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="comment">; non-normalized function table with a sample 1</span>
giFile <span class="ohdr">ftgen</span> 1, 0, 0, <span class="op">-</span>1, "fox.wav", 0, 0, 0
<span class="comment">; Instrument #1 - uses poscil3 for playing samples from a function table</span>
<span class="oblock">instr</span> 1
kamp <span class="op">=</span> p4
kspeed <span class="op">=</span> p5
ifn <span class="op">=</span> 1
iskip <span class="op">=</span> p6
kcps <span class="op">=</span> kspeed <span class="op">/</span> (<span class="opc">ftlen</span>(ifn) <span class="op">/</span> <span class="opc">ftsr</span>(ifn))<span class="comment">; frequency of the oscillator</span>
iphs <span class="op">=</span> iskip <span class="op">/</span> (<span class="opc">ftlen</span>(ifn) <span class="op">/</span> <span class="opc">ftsr</span>(ifn))<span class="comment">; calculates skiptime to phase values (0-1)</span>
a1 <span class="opc">poscil3</span> kamp, kcps, ifn, iphs
<span class="opc">out</span> a1
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span>1 0 2.756 1 1 0
<span class="stamnt">i</span>1 3 2.756 1 -1 0
<span class="stamnt">i</span>1 6 1.378 1 .5 2.067
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1" title="See Also">
<a id="idp36904256"></a>
<h2>See Also</h2>
<p>
<a class="link" href="poscil.html" title="poscil"><em class="citetitle">poscil</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp36905304"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Authors: John ffitch, Gabriel Maldonado</td>
</tr>
<tr>
<td>Italy</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 3.52</p>
<p> variants with a-rate amplitude or frequency new in
5.16</p>
</div>
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