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<h2>
<span class="refentrytitle">lposcilsa</span>
</h2>
<p>lposcilsa —
Read stereo sampled sound from a table with looping and high precision.
</p>
</div>
<div class="refsect1">
<a id="idm281472917500760"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>lposcilsa</em></span> reads stereo sampled sound from a table with looping and high precision.
</p>
</div>
<div class="refsect1">
<a id="idm281472917499064"></a>
<h2>Syntax</h2>
<pre class="synopsis">ar1, ar2 <span class="command"><strong>lposcilsa</strong></span> aamp, kfreqratio, kloop, kend, ift [,iphs] </pre>
</div>
<div class="refsect1">
<a id="idm281472917496824"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ift</em></span> -- function table number
</p>
<p>
<span class="emphasis"><em>iphs</em></span> -- initial phase (in samples)
</p>
</div>
<div class="refsect1">
<a id="idm281472917429224"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>ar1, ar2</em></span> -- output signal
</p>
<p>
<span class="emphasis"><em>aamp</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>lposcilsa</em></span> is the same as <a class="link" href="lposcila.html" title="lposcila"><em class="citetitle">lposcila</em></a>, but works with stereo files loaded with <a class="link" href="GEN01.html" title="GEN01"><em class="citetitle">GEN01</em></a>.
</p>
</div>
<div class="refsect1">
<a id="idm281472917421048"></a>
<h2>Examples</h2>
<p>
Here is an example of the lposcilsa opcode. It uses the file <a class="ulink" href="examples/lposcilsa.csd" target="_top"><em class="citetitle">lposcilsa.csd</em></a>.
</p>
<div class="example">
<a id="idm281472917419192"></a>
<p class="title">
<strong>Example 503. Example of the lposcilsa 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="idm281472743477496"></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 lposcilsa.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">1.3</span> <span class="c1">;a 3th 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">env</span> <span class="nb">expsega</span> <span class="mf">0.01</span><span class="p">,</span> <span class="mf">0.1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">0.1</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="mf">0.01</span> <span class="c1">;envelope with fast and short segment</span>
a<span class="n">L</span><span class="p">,</span> a<span class="n">R</span> <span class="nb">lposcilsa</span> a<span class="n">env</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="c1">;use it for amplitude</span>
<span class="nb">outs</span> a<span class="n">L</span><span class="p">,</span> a<span class="n">R</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="c1">; table size of stereo file 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">"kickroll.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">2</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
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<p><br class="example-break" />
</p>
</div>
<div class="refsect1">
<a id="idm281472917414904"></a>
<h2>See Also</h2>
<p>
<a class="link" href="lposcil.html" title="lposcil"><em class="citetitle">lposcil</em></a>,
<a class="link" href="lposcila.html" title="lposcila"><em class="citetitle">lposcila</em></a>,
<a class="link" href="lposcilsa2.html" title="lposcilsa2"><em class="citetitle">lposcilsa2</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472917410936"></a>
<h2>Credits</h2>
<p>Author: Gabriel Maldonado</p>
<p>New in version 5.06</p>
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