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<div class="refentry" title="vaget">
<a id="vaget"></a>
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<a id="IndexAvarGet" class="indexterm"></a>
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<h2>
<span class="refentrytitle">vaget</span>
</h2>
<p>vaget —
Access values of the current buffer of an a-rate variable by indexing.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp50131864"></a>
<h2>Description</h2>
<p>
Access values of the current buffer of an a-rate variable by indexing.
Useful for doing sample-by-sample manipulation at k-rate without using
setksmps 1.
</p>
<div class="note" title="Note" style="margin-left: 0.5in; margin-right: 0.5in;">
<table border="0" summary="Note: Note">
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<td rowspan="2" align="center" valign="top" width="25">
<img alt="[Note]" src="images/note.png" />
</td>
<th align="left">Note</th>
</tr>
<tr>
<td align="left" valign="top">
<p>Because this opcode does not do any bounds checking, the user
must be careful not to try to read values past ksmps (the
size of a buffer for an a-rate variable) by using index values greater
than ksmps.</p>
</td>
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<p>
</p>
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</td>
<th align="left">Note</th>
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<p>In Csound6 this opcode does do bounds checking.</p>
</td>
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<p>
</p>
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<div class="refsect1" title="Syntax">
<a id="idp50120312"></a>
<h2>Syntax</h2>
<pre class="synopsis">kval <span class="command"><strong>vaget</strong></span> kndx, avar</pre>
</div>
<div class="refsect1" title="Performance">
<a id="idp50171984"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kval</em></span> - value read from avar
</p>
<p>
<span class="emphasis"><em>kndx</em></span> - index of the sample to read from the current
buffer of the given avar variable
</p>
<p>
<span class="emphasis"><em>avar</em></span> - a-rate variable to read from
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp50173688"></a>
<h2>Examples</h2>
<p>
Here is an example of the vaget opcode. It uses the file <a class="ulink" href="examples/vaget.csd" target="_top"><em class="citetitle">vaget.csd</em></a>.
</p>
<div class="example">
<a id="idp50174656"></a>
<p class="title">
<strong>Example 916. Example of the vaget 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">; Audio out Audio in No messages</span>
-odac -iadc -d <span class="comment">;;;RT audio I/O</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o avarget.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>16
<span class="ohdr">nchnls</span><span class="op">=</span>2
<span class="oblock">instr</span> 1 <span class="comment">; Sqrt Signal</span>
ifreq <span class="op">=</span> (p4 <span class="op">></span> 15 <span class="op">?</span> p4 <span class="op">:</span> <span class="opc">cpspch</span>(p4))
iamp <span class="op">=</span> <span class="opc">ampdb</span>(p5)
aout <span class="opc">init</span> 0
ksampnum <span class="opc">init</span> 0
kenv <span class="opc">linseg</span> 0, p3 <span class="op">*</span> .5, 1, p3 <span class="op">*</span> .5, 0
aout1 <span class="opc">vco2</span> 1, ifreq
aout2 <span class="opc">vco2</span> .5, ifreq <span class="op">*</span> 2
aout3 <span class="opc">vco2</span> .2, ifreq <span class="op">*</span> 4
aout <span class="opc">sum</span> aout1, aout2, aout3
<span class="comment">;Take Sqrt of signal, checking for negatives</span>
kcount <span class="op">=</span> 0
<span class="olabel">loopStart</span><span class="op">:</span>
kval <span class="opc">vaget</span> kcount,aout
<span class="octrl">if</span> (kval <span class="op">></span> .0) then
kval <span class="op">=</span> <span class="opc">sqrt</span>(kval)
<span class="octrl">elseif</span> (kval <span class="op"><</span> 0) then
kval <span class="op">=</span> <span class="opc">sqrt</span>(<span class="op">-</span>kval) <span class="op">*</span> <span class="op">-</span>1
<span class="octrl">else</span>
kval <span class="op">=</span> 0
<span class="octrl">endif</span>
<span class="opc">vaset</span> kval, kcount,aout
<span class="octrl">loop_lt</span> kcount, 1, ksmps, <span class="olabel">loopStart</span>
aout <span class="op">=</span> aout <span class="op">*</span> kenv
aout <span class="opc">moogladder</span> aout, 8000, .1
aout <span class="op">=</span> aout <span class="op">*</span> iamp
<span class="opc">outs</span> aout, aout
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span>1 0.0 2 440 80
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1" title="See Also">
<a id="idp50176928"></a>
<h2>See Also</h2>
<p>
<a class="link" href="vaset.html" title="vaset"><em class="citetitle">vaset</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp50177944"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Steven Yi</td>
</tr>
</table>
<p>
</p>
<p>New in version 5.04</p>
<p>September 2006.</p>
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