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<span class="refentrytitle">pvsinfo</span>
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<p>pvsinfo —
Get information from a PVOC-EX formatted source.
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<div class="refsect1" title="Description">
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<h2>Description</h2>
<p>
Get format information about fsrc, whether created by an opcode such as pvsanal, or obtained from a PVOCEX file by pvsfread. This information is available at init time, and can be used to set parameters for other pvs opcodes, and in particular for creating function tables (e.g. for pvsftw), or setting the number of oscillators for pvsadsyn.
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<div class="refsect1" title="Syntax">
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<h2>Syntax</h2>
<pre class="synopsis">ioverlap, inumbins, iwinsize, iformat <span class="command"><strong>pvsinfo</strong></span> fsrc</pre>
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<div class="refsect1" title="Initialization">
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<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ioverlap</em></span> -- The stream overlap size.
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<p>
<span class="emphasis"><em>inumbins</em></span> -- The number of analysis bins (amplitude+frequency) in fsrc. The underlying FFT size is calculated as (inumbins -1) * 2.
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<p>
<span class="emphasis"><em>iwinsize</em></span> -- The analysis window size. May be larger than the FFT size.
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<p>
<span class="emphasis"><em>iformat</em></span> -- The analysis frame format. If fsrc is created by an opcode, iformat will always be 0, signifying amplitude+frequency. If fsrc is defined from a PVOC-EX file, iformat may also have the value 1 or 2 (amplitude+phase, complex).
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<h2>Examples</h2>
<p>
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<div class="informalexample">
<pre class="programlisting">
fim pvsfread "test.pvx" ; import pvocex file
iovl,inb,iws,ifmt pvsinfo fim ; get inumbins info
ifn ftgen 0,0,inb,10,1 ; and create f-table
</pre>
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<h2>Credits</h2>
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<td>Author: Richard Dobson</td>
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<td>August 2001 </td>
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<p>New in version 4.13</p>
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