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<h2>
<span class="refentrytitle">zkw</span>
</h2>
<p>zkw —
Writes to a zk variable at k-rate without mixing.
</p>
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<div class="refsect1" title="Description">
<a id="idp54976856"></a>
<h2>Description</h2>
<p>
Writes to a zk variable at k-rate without mixing.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp54977592"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>zkw</strong></span> ksig, kndx</pre>
</div>
<div class="refsect1" title="Performance">
<a id="idp54987992"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>ksig</em></span> -- value to be written to the zk location.
</p>
<p>
<span class="emphasis"><em>kndx</em></span> -- points to the zk or za location to which to write.
</p>
<p>
<span class="emphasis"><em>zkw</em></span> writes <span class="emphasis"><em>ksig</em></span> into the zk variable specified by <span class="emphasis"><em>kndx</em></span>.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp54990312"></a>
<h2>Examples</h2>
<p>
Here is an example of the zkw opcode. It uses the file <a class="ulink" href="examples/zkw.csd" target="_top"><em class="citetitle">zkw.csd</em></a>.
</p>
<div class="example">
<a id="idp54991288"></a>
<p class="title">
<strong>Example 1021. Example of the zkw 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 zkw.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="comment">; Initialize the global variables.</span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">kr</span> <span class="op">=</span> 4410
<span class="ohdr">ksmps</span> <span class="op">=</span> 10
<span class="ohdr">nchnls</span> <span class="op">=</span> 1
<span class="comment">; Initialize the ZAK space.</span>
<span class="comment">; Create 1 a-rate variable and 1 k-rate variable.</span>
<span class="opc">zakinit</span> 1, 1
<span class="comment">; Instrument #1 -- a simple waveform.</span>
<span class="oblock">instr</span> 1
<span class="comment">; Linearly vary a k-rate signal from 100 to 1,000.</span>
kline <span class="opc">line</span> 100, p3, 1000
<span class="comment">; Add the linear signal to zk variable #1.</span>
<span class="opc">zkw</span> kline, 1
<span class="oblock">endin</span>
<span class="comment">; Instrument #2 -- generates audio output.</span>
<span class="oblock">instr</span> 2
<span class="comment">; Read zk variable #1.</span>
kfreq <span class="opc">zkr</span> 1
<span class="comment">; Use the value of zk variable #1 to vary </span>
<span class="comment">; the frequency of a sine waveform.</span>
a1 <span class="opc">oscil</span> 20000, kfreq, 1
<span class="comment">; Generate the audio output.</span>
<span class="opc">out</span> a1
<span class="comment">; Clear the zk variables, get them ready for </span>
<span class="comment">; another pass.</span>
<span class="opc">zkcl</span> 0, 1
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Table #1, a sine wave.</span>
<span class="stamnt">f</span> 1 0 16384 10 1
<span class="comment">; Play Instrument #1 for two seconds.</span>
<span class="stamnt">i</span> 1 0 2
<span class="comment">; Play Instrument #2 for two seconds.</span>
<span class="stamnt">i</span> 2 0 2
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
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<p><br class="example-break" />
</p>
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<div class="refsect1" title="See Also">
<a id="idp55024136"></a>
<h2>See Also</h2>
<p>
<a class="link" href="zaw.html" title="zaw"><em class="citetitle">zaw</em></a>,
<a class="link" href="zawm.html" title="zawm"><em class="citetitle">zawm</em></a>,
<a class="link" href="ziw.html" title="ziw"><em class="citetitle">ziw</em></a>,
<a class="link" href="ziwm.html" title="ziwm"><em class="citetitle">ziwm</em></a>,
<a class="link" href="zkr.html" title="zkr"><em class="citetitle">zkr</em></a>,
<a class="link" href="zkwm.html" title="zkwm"><em class="citetitle">zkwm</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp55027528"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Robin Whittle</td>
</tr>
<tr>
<td>Australia</td>
</tr>
<tr>
<td>May 1997</td>
</tr>
</table>
<p>
</p>
<p>New in version 3.45</p>
<p>Example written by Kevin Conder.</p>
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