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<refentry id="nsamp">
<indexterm id="IndexNsamp"><primary>nsamp</primary></indexterm>
<refentryinfo><title>Table Control:Table Queries</title></refentryinfo>
<refmeta>
<refentrytitle>nsamp</refentrytitle>
</refmeta>
<refnamediv>
<refname>nsamp</refname>
<refpurpose>
Returns the number of samples loaded into a stored function table number.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Returns the number of samples loaded into a stored function table number.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis><command>nsamp</command>(x) (init-rate args only)</synopsis>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
Returns the number of samples loaded into stored function table number <emphasis>x</emphasis> 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.
</para>
<para>
As of Csound version 5.02, <emphasis>ftlen</emphasis> works with deferred-length function tables (see
GEN01).
</para>
<para>
<emphasis>nsamp</emphasis> differs from <emphasis>ftlen</emphasis> in that <emphasis>nsamp</emphasis> gives the number of sample frames loaded, while <emphasis>ftlen</emphasis> 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.
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Here is an example of the nsamp opcode. It uses the file <ulink url="examples/nsamp.csd"><citetitle>nsamp.csd</citetitle></ulink>, and <ulink url="examples/mary.wav"><citetitle>mary.wav</citetitle></ulink>.
<example>
<title>Example of the nsamp opcode.</title>
<para>See the sections <link linkend="UsingRealTime"><citetitle>Real-time Audio</citetitle></link> and <link linkend="CommandFlags"><citetitle>Command Line Flags</citetitle></link> for more information on using command line flags.</para>
<xi:include href="examples-xml/nsamp.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
Since the audio file <quote>mary.wav</quote> has 154390 samples, its output should include a line like this:
<screen>
instr 1: isz = 154390.000
</screen>
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<link linkend="ftchnls"><citetitle>ftchnls</citetitle></link>,
<link linkend="ftlen"><citetitle>ftlen</citetitle></link>,
<link linkend="ftlptim"><citetitle>ftlptim</citetitle></link>,
<link linkend="ftsr"><citetitle>ftsr</citetitle></link>
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: &namegabriel;</member>
<member>Italy</member>
<member>October 1998</member>
</simplelist>
</para>
<para>Example written by &namekevin;.</para>
</refsect1>
</refentry>
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