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<h2>
<span class="refentrytitle">lposcil</span>
</h2>
<p>lposcil —
Read sampled sound from a table with looping and high precision.
</p>
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<div class="refsect1">
<a id="idm281472917693288"></a>
<h2>Description</h2>
<p>
Read sampled sound (mono or stereo) from a table, with looping, and high precision.
</p>
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<div class="refsect1">
<a id="idm281472917614632"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>lposcil</strong></span> kamp, kfreqratio, kloop, kend, ifn [, iphs]</pre>
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<div class="refsect1">
<a id="idm281472917612392"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifn</em></span> -- function table number
</p>
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<div class="refsect1">
<a id="idm281472917610776"></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>lposcil</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">
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<h2>Examples</h2>
<p>
Here is an example of the lposcil opcode. It uses the file <a class="ulink" href="examples/lposcil.csd" target="_top"><em class="citetitle">lposcil.csd</em></a>.
</p>
<div class="example">
<a id="idm281472917602712"></a>
<p class="title">
<strong>Example 500. Example of the lposcil 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="idm281472745569256"></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 lposcil.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">cps</span> <span class="o">=</span> <span class="mf">1.5</span> <span class="c1">; a fifth up</span>
k<span class="n">loop</span> <span class="o">=</span> <span class="mi">0</span> <span class="c1">; loop start time in samples</span>
k<span class="n">end</span> <span class="o">=</span> <span class="mi">45000</span> <span class="c1">; loop end time in samples</span>
a<span class="n">sig</span> <span class="nb">lposcil</span> <span class="mi">1</span><span class="p">,</span> k<span class="n">cps</span><span class="p">,</span> k<span class="n">loop</span><span class="p">,</span> k<span class="n">end</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="c1">; Its table size is deferred,</span>
<span class="c1">; and format taken from the soundfile header.</span>
<span class="nb">f</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">1</span> <span class="s">"beats.wav"</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">0</span>
<span class="c1">; Play Instrument #1 for 6 seconds.</span>
<span class="c1">; This will loop the drum pattern several times.</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">6</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1">
<a id="idm281472917598424"></a>
<h2>See Also</h2>
<p>
<a class="link" href="lposcil3.html" title="lposcil3"><em class="citetitle">lposcil3</em></a>,
<a class="link" href="lposcila.html" title="lposcila"><em class="citetitle">lposcila</em></a>,
<a class="link" href="lposcilsa.html" title="lposcilsa"><em class="citetitle">lposcilsa</em></a>,
<a class="link" href="lposcilsa2.html" title="lposcilsa2"><em class="citetitle">lposcilsa2</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472917593496"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Gabriel Maldonado</td>
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<td>Italy</td>
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<p>
</p>
<p>New in Csound version 3.52</p>
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