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<h2>
<span class="refentrytitle">filelen</span>
</h2>
<p>filelen —
Returns the length of a sound file.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp19988168"></a>
<h2>Description</h2>
<p>
Returns the length of a sound file.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp19988880"></a>
<h2>Syntax</h2>
<pre class="synopsis">ir <span class="command"><strong>filelen</strong></span> ifilcod, [iallowraw]</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp19999336"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifilcod</em></span> -- sound file to be queried
</p>
<p>
<span class="emphasis"><em>iallowraw</em></span> -- Allow raw sound files (default=1)
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp20000704"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>filelen</em></span> returns the length of the sound file <span class="emphasis"><em>ifilcod</em></span> in seconds. <span class="emphasis"><em>filelen</em></span> can return the length of convolve and PVOC files if the "allow raw sound file" flag is not zero (it is non-zero by default).
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp20002232"></a>
<h2>Examples</h2>
<p>
Here is an example of the filelen opcode. It uses the file <a class="ulink" href="examples/filelen.csd" target="_top"><em class="citetitle">filelen.csd</em></a>, <a class="ulink" href="examples/fox.wav" target="_top"><em class="citetitle">fox.wav</em></a>, and <a class="ulink" href="examples/kickroll.wav" target="_top"><em class="citetitle">kickroll.wav</em></a>.
</p>
<div class="example">
<a id="idp20040968"></a>
<p class="title">
<strong>Example 226. Example of the filelen 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>
<span class="comment">;-odac ;;;realtime audio out</span>
-iadc <span class="comment">;;;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 filelen.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 <span class="comment">; choose between mono or stereo file</span>
ilen <span class="opc">filelen</span> p4 <span class="comment">;calculate length of soundfile</span>
<span class="opc">print</span> ilen
ichn <span class="opc">filenchnls</span> p4 <span class="comment">;check number of channels</span>
<span class="comment">;print ichn</span>
<span class="octrl">if</span> (ichn <span class="op">==</span> 1) then
<span class="comment">;mono signal</span>
asig <span class="opc">diskin2</span> p4, 1
<span class="opc">outs</span> asig, asig
<span class="octrl">else</span>
<span class="comment">;stereo signal</span>
aL, aR <span class="opc">diskin2</span> p4, .5, 0, 1
<span class="opc">outs</span> aL, aR
<span class="octrl">endif</span>
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span> 1 0 3 "fox.wav" <span class="comment">;mono signal</span>
<span class="stamnt">i</span> 1 5 2 "k<span class="stamnt">i</span>ckroll.wav" <span class="comment">;stereo signal</span>
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
The mono audio file <span class="quote">“<span class="quote">fox.wav</span>”</span> is 2.8 seconds long, and the stereo file <span class="quote">“<span class="quote">kickroll.wav</span>”</span> is 0.9 seconds. So <span class="emphasis"><em>filelen</em></span>'s output should include a line for the mono and the stereo file like this:
</p>
<pre class="screen">
instr 1: ilen = 2.757
instr 1: ilen = 0.857
</pre>
<p>
</p>
</div>
<div class="refsect1" title="See Also">
<a id="idp20044592"></a>
<h2>See Also</h2>
<p>
<a class="link" href="filebit.html" title="filebit"><em class="citetitle">filebit</em></a>,
<a class="link" href="filenchnls.html" title="filenchnls"><em class="citetitle">filenchnls</em></a>,
<a class="link" href="filepeak.html" title="filepeak"><em class="citetitle">filepeak</em></a>,
<a class="link" href="filesr.html" title="filesr"><em class="citetitle">filesr</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp20047128"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Matt Ingalls</td>
</tr>
<tr>
<td>July 1999</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 3.57</p>
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distrib
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Mageia
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