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<h2>
<span class="refentrytitle">lowresx</span>
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<p>lowresx —
Simulates layers of serially connected resonant lowpass filters.
</p>
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<div class="refsect1" title="Description">
<a id="id2999789"></a>
<h2>Description</h2>
<p>
<span class="emphasis"><em>lowresx</em></span> is equivalent to more layers of <a class="link" href="lowres.html" title="lowres"><em class="citetitle">lowres</em></a> with the same arguments serially connected.
</p>
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<div class="refsect1" title="Syntax">
<a id="id2999971"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>lowresx</strong></span> asig, kcutoff, kresonance [, inumlayer] [, iskip]</pre>
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<div class="refsect1" title="Initialization">
<a id="id2999990"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>inumlayer</em></span> -- number of elements in a <span class="emphasis"><em>lowresx</em></span> stack. Default value is 4. There is no maximum.
</p>
<p>
<span class="emphasis"><em>iskip</em></span> -- initial disposition of internal data space. A zero value will clear the space; a non-zero value will allow previous information to remain. The default value is 0.
</p>
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<div class="refsect1" title="Performance">
<a id="id3000023"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>asig</em></span> -- input signal
</p>
<p>
<span class="emphasis"><em>kcutoff</em></span> -- filter cutoff frequency point
</p>
<p>
<span class="emphasis"><em>kresonance</em></span> -- resonance amount
</p>
<p>
<span class="emphasis"><em>lowresx</em></span> is equivalent to more layer of <a class="link" href="lowres.html" title="lowres"><em class="citetitle">lowres</em></a> with the same arguments serially connected. Using a stack of a larger number of filters allows a sharper cutoff. This is faster than using a larger number of instances of <span class="emphasis"><em>lowres</em></span> in a Csound orchestra because only one initialization and k cycle are needed at time and the audio loop falls entirely inside the cache memory of processor. Based on an orchestra by Hans Mikelson
</p>
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<div class="refsect1" title="Examples">
<a id="id3000700"></a>
<h2>Examples</h2>
<p>
Here is an example of the lowresx opcode. It uses the file <a class="ulink" href="examples/lowresx.csd" target="_top"><em class="citetitle">lowresx.csd</em></a>, and <a class="ulink" href="examples/beats.wav" target="_top"><em class="citetitle">beats.wav</em></a>.
</p>
<div class="example">
<a id="id3000728"></a>
<p class="title">
<b>Example 349. Example of the lowresx opcode.</b>
</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 lowresx.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">; Instrument #1 - play the sawtooth waveform through a </span>
<span class="comment">; stack of filters.</span>
<span class="oblock">instr</span> 1
<span class="comment">; Use a nice sawtooth waveform.</span>
asig <span class="opc">vco</span> 5, 440, 1
<span class="comment">; Vary the cutoff frequency from 30 to 300 Hz.</span>
kcutoff <span class="opc">line</span> 30, p3, 600
kresonance <span class="op">=</span> 3
inumlayer <span class="op">=</span> 5
alr <span class="opc">lowresx</span> asig, kcutoff, kresonance, inumlayer
<span class="comment">; It gets loud, so clip the output amplitude to 30,000.</span>
a1 <span class="opc">clip</span> alr, 1, 30000
<span class="opc">out</span> a1
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="comment">; Table #1, a sine wave for the vco opcode.</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 4
<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="id3000766"></a>
<h2>See Also</h2>
<p>
<a class="link" href="lowres.html" title="lowres"><em class="citetitle">lowres</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="id3000783"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
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<td>Author: Gabriel Maldonado (adapted by John ffitch)</td>
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<td>Italy</td>
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<p>
</p>
<p>New in Csound version 3.49</p>
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