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<div class="refentry" title="vaset">
<a id="vaset"></a>
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<a id="IndexAvarSet" class="indexterm"></a>
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<h2>
<span class="refentrytitle">vaset</span>
</h2>
<p>vaset —
Write value of into the current buffer of an a-rate variable by index.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp50182504"></a>
<h2>Description</h2>
<p>
Write values into the current buffer of an a-rate variable at the given
index. 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 write 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>
<div class="note" title="Note" style="margin-left: 0.5in; margin-right: 0.5in;">
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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="idp50184712"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>vaset</strong></span> kval, kndx, avar</pre>
</div>
<div class="refsect1" title="Performance">
<a id="idp50237992"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kval</em></span> - value to write into avar
</p>
<p>
<span class="emphasis"><em>kndx</em></span> - index of the sample to write to the current
buffer of the given avar variable
</p>
<p>
<span class="emphasis"><em>avar</em></span> - a-rate variable to write to
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp50239752"></a>
<h2>Examples</h2>
<p>
Here is an example of the vaset opcode. It uses the file <a class="ulink" href="examples/vaset.csd" target="_top"><em class="citetitle">vaset.csd</em></a>.
</p>
<div class="example">
<a id="idp50240720"></a>
<p class="title">
<strong>Example 919. Example of the vaset 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 avarset.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>1
<span class="ohdr">nchnls</span><span class="op">=</span>2
<span class="oblock">instr</span> 1 <span class="comment">; Sine Wave</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)
kenv <span class="opc">adsr</span> 0.1, 0.05, .9, 0.2
aout <span class="opc">init</span> 0
ksampnum <span class="opc">init</span> 0
kcount <span class="op">=</span> 0
iperiod <span class="op">=</span> <span class="ohdr">sr</span> <span class="op">/</span> ifreq
i2pi <span class="op">=</span> 3.14159 <span class="op">*</span> 2
<span class="olabel">loopStart</span><span class="op">:</span>
kphase <span class="op">=</span> (ksampnum <span class="op">%</span> iperiod) <span class="op">/</span> iperiod
knewval <span class="op">=</span> <span class="opc">sin</span>(kphase <span class="op">*</span> i2pi)
<span class="opc">vaset</span> knewval, kcount,aout
ksampnum <span class="op">=</span> ksampnum <span class="op">+</span> 1
<span class="octrl">loop_lt</span> kcount, 1, ksmps, <span class="olabel">loopStart</span>
aout <span class="op">=</span> aout <span class="op">*</span> iamp <span class="op">*</span> kenv
<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>
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<div class="refsect1" title="See Also">
<a id="idp50242992"></a>
<h2>See Also</h2>
<p>
<a class="link" href="vaget.html" title="vaget"><em class="citetitle">vaget</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp50244008"></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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