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<h2>
<span class="refentrytitle">nsamp</span>
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<p>nsamp —
Returns the number of samples loaded into a stored function table number.
</p>
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<div class="refsect1" title="Description">
<a id="idp33110936"></a>
<h2>Description</h2>
<p>
Returns the number of samples loaded into a stored function table number.
</p>
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<div class="refsect1" title="Syntax">
<a id="idp33153064"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>nsamp</strong></span>(x) (init-rate args only)</pre>
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<div class="refsect1" title="Performance">
<a id="idp33154040"></a>
<h2>Performance</h2>
<p>
Returns the number of samples loaded into stored function table number <span class="emphasis"><em>x</em></span> by GEN01. This is useful when a sample is shorter than the power-of-two function table that holds it. New in Csound version 3.49.
</p>
<p>
As of Csound version 5.02, <span class="emphasis"><em>nsamp</em></span> works with deferred-length function tables (see
<a class="link" href="GEN01.html" title="GEN01"><em class="citetitle">GEN01</em></a>).
</p>
<p>
<span class="emphasis"><em>nsamp</em></span> differs from <span class="emphasis"><em>ftlen</em></span> in that <span class="emphasis"><em>nsamp</em></span> gives the number of sample frames loaded, while <span class="emphasis"><em>ftlen</em></span> gives the total number of samples. For example, with a stereo sound file of 10000 samples, ftlen() would return 19999 (i.e. a total of 20000 mono samples, not including a guard point), but nsamp() returns 10000.
</p>
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<div class="refsect1" title="Examples">
<a id="idp33157384"></a>
<h2>Examples</h2>
<p>
Here is an example of the nsamp opcode. It uses the file <a class="ulink" href="examples/nsamp.csd" target="_top"><em class="citetitle">nsamp.csd</em></a>, <a class="ulink" href="examples/kickroll.wav" target="_top"><em class="citetitle">kickroll.wav</em></a>. and <a class="ulink" href="examples/fox.wav" target="_top"><em class="citetitle">fox.wav</em></a>.
</p>
<div class="example">
<a id="idp33159216"></a>
<p class="title">
<strong>Example 516. Example of the nsamp 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 nsamp.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">; slightly adapted example from Jonathan Murphy Dec 2006</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
ifn <span class="op">=</span> p4 <span class="comment">; table number</span>
ilen <span class="op">=</span> <span class="opc">nsamp</span>(ifn)
<span class="opc">prints</span> "actual numbers of samples <span class="op">=</span> <span class="op">%</span>d\n", ilen
itrns <span class="op">=</span> 1 <span class="comment">; no transposition</span>
ilps <span class="op">=</span> 0 <span class="comment">; loop starts at index 0</span>
ilpe <span class="op">=</span> ilen <span class="comment">; ends at value returned by nsamp above</span>
imode <span class="op">=</span> 1 <span class="comment">; loops forward</span>
istrt <span class="op">=</span> 0 <span class="comment">; commence playback at index 0 samples</span>
<span class="comment">; lphasor provides index into f1 </span>
alphs <span class="opc">lphasor</span> itrns, ilps, ilpe, imode, istrt
atab <span class="opc">tablei</span> alphs, ifn
<span class="opc">outs</span> atab, atab
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">f</span> 1 0 262144 1 "kickroll.wav" 0 4 1 <span class="comment">;stereo file in table, with lots of zeroes</span>
<span class="stamnt">f</span> 2 0 262144 1 "<span class="stamnt">f</span>ox.wav" 0 4 1 <span class="comment">;mono file in table, with lots of zeroes</span>
<span class="stamnt">i</span>1 0 10 1
<span class="stamnt">i</span>1 + 10 2
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
Since the stereo audio file <span class="quote">“<span class="quote">kickroll.wav</span>”</span> has 37792 samples and the mono file <span class="quote">“<span class="quote">fox.wav</span>”</span> has 121569 samples, its output should include lines like these:
</p>
<pre class="screen">
actual numbers of samples = 37792
actual numbers of samples = 121569</pre>
<p>
</p>
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<div class="refsect1" title="See Also">
<a id="idp33162456"></a>
<h2>See Also</h2>
<p>
<a class="link" href="ftchnls.html" title="ftchnls"><em class="citetitle">ftchnls</em></a>,
<a class="link" href="ftlen.html" title="ftlen"><em class="citetitle">ftlen</em></a>,
<a class="link" href="ftlptim.html" title="ftlptim"><em class="citetitle">ftlptim</em></a>,
<a class="link" href="ftsr.html" title="ftsr"><em class="citetitle">ftsr</em></a>
</p>
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<div class="refsect1" title="Credits">
<a id="idp33164952"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
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<td>Author: Gabriel Maldonado</td>
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<td>Italy</td>
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<td>October 1998</td>
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