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<h2>
<span class="refentrytitle">lposcil3</span>
</h2>
<p>lposcil3 —
Read sampled sound from a table with high precision and cubic interpolation.
</p>
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<div class="refsect1" title="Description">
<a id="idp29657224"></a>
<h2>Description</h2>
<p>
Read sampled sound (mono or stereo) from a table, with looping, and high precision. <span class="emphasis"><em>lposcil3</em></span> uses cubic interpolation.
</p>
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<div class="refsect1" title="Syntax">
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<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>lposcil3</strong></span> kamp, kfreqratio, kloop, kend, ifn [, iphs]</pre>
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<div class="refsect1" title="Initialization">
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<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifn</em></span> -- function table number
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp29669472"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kamp</em></span> -- amplitude
</p>
<p>
<span class="emphasis"><em>kfreqratio</em></span> -- multiply factor of table frequency (for example: 1 = original frequency, 1.5 = a fifth up , .5 = an octave down)
</p>
<p>
<span class="emphasis"><em>kloop</em></span> -- start loop point (in samples)
</p>
<p>
<span class="emphasis"><em>kend</em></span> -- end loop point (in samples)
</p>
<p>
<span class="emphasis"><em>lposcil3</em></span> (looping precise oscillator) allows varying at k-rate, the starting and ending point of a sample contained in a table (<a class="link" href="GEN01.html" title="GEN01"><em class="citetitle">GEN01</em></a>). This can be useful when reading a sampled loop of a wavetable, where repeat speed can be varied during the performance.
</p>
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<div class="refsect1" title="Examples">
<a id="idp29706576"></a>
<h2>Examples</h2>
<p>
Here is an example of the lposcil3 opcode. It uses the file <a class="ulink" href="examples/lposcil3.csd" target="_top"><em class="citetitle">lposcil3.csd</em></a>.
</p>
<div class="example">
<a id="idp29707528"></a>
<p class="title">
<strong>Example 422. Example of the lposcil3 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 lposcil3.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
kcps <span class="op">=</span> 1.5 <span class="comment">; a fifth up</span>
kloop <span class="op">=</span> 0 <span class="comment">; loop start time (in samples)</span>
kend <span class="opc">line</span> 45000, p3, 10000 <span class="comment">; vary loop end time (in samples)</span>
asig <span class="opc">lposcil3</span> 1, kcps, kloop, kend, 1
<span class="opc">outs</span> asig, asig
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Its table size is deferred,</span>
<span class="comment">; and format taken from the soundfile header.</span>
<span class="stamnt">f</span> 1 0 0 1 "beats.wav" 0 0 0
<span class="comment">; Play Instrument #1 for 6 seconds.</span>
<span class="comment">; This will loop the drum pattern several times.</span>
<span class="stamnt">i</span> 1 0 6
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1" title="See Also">
<a id="idp29709808"></a>
<h2>See Also</h2>
<p>
<a class="link" href="lposcil.html" title="lposcil"><em class="citetitle">lposcil</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp29710824"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Gabriel Maldonado</td>
</tr>
<tr>
<td>Italy</td>
</tr>
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<p>
</p>
<p>New in Csound version 3.52</p>
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