<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>vlowres</title>
<link rel="stylesheet" type="text/css" href="csound.css" />
<meta name="generator" content="DocBook XSL Stylesheets V1.76.1" />
<link rel="home" href="index.html" title="The Canonical Csound Reference Manual" />
<link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" />
<link rel="prev" href="vlinseg.html" title="vlinseg" />
<link rel="next" href="vmap.html" title="vmap" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">vlowres</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="vlinseg.html">Prev</a> </td>
<th width="60%" align="center">Orchestra Opcodes and Operators</th>
<td width="20%" align="right"> <a accesskey="n" href="vmap.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry" title="vlowres">
<a id="vlowres"></a>
<div class="titlepage"></div>
<a id="IndexVlowres" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">vlowres</span>
</h2>
<p>vlowres —
A bank of filters in which the cutoff frequency can be separated under user control.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp52083704"></a>
<h2>Description</h2>
<p>
A bank of filters in which the cutoff frequency can be separated under user control
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp52084512"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>vlowres</strong></span> asig, kfco, kres, iord, ksep</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp52092984"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>iord</em></span> -- total number of filters (1 to 10)
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp52093880"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>asig</em></span> -- input signal
</p>
<p>
<span class="emphasis"><em>kfco</em></span> -- frequency cutoff (not in Hz)
</p>
<p>
<span class="emphasis"><em>kres</em></span> -- resonance amount
</p>
<p>
<span class="emphasis"><em>ksep</em></span> -- frequency cutoff separation for each filter: the first filter has a kfreq cutoff, the second has a kfreq + ksep and the third kfreq + 2*ksep and so on, depending on the number of filters.
</p>
<p>
<span class="emphasis"><em>vlowres</em></span> (variable resonant lowpass filter) allows a variable response curve in resonant filters. It can be thought of as a bank of lowpass resonant filters, each with the same resonance, serially connected. The frequency cutoff of each filter can vary with the <span class="emphasis"><em>kcfo</em></span> and <span class="emphasis"><em>ksep</em></span> parameters.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp52097680"></a>
<h2>Examples</h2>
<p>
Here is an example of the vlowres opcode. It uses the file <a class="ulink" href="examples/vlowres.csd" target="_top"><em class="citetitle">vlowres.csd</em></a>.
</p>
<div class="example">
<a id="idp52154904"></a>
<p class="title">
<strong>Example 955. Example of the vlowres 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>
-odac <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if RT audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o vlowres.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> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
<span class="oblock">instr</span> 1
kamp <span class="opc">init</span> p4
asig <span class="opc">vco2</span> kamp, 110 <span class="comment">;saw wave</span>
kfco <span class="opc">line</span> 30, p3, 300 <span class="comment">;vary the cutoff frequency from 30 to 300 Hz.</span>
kres <span class="op">=</span> 20
ksep <span class="op">=</span> p5 <span class="comment">;different resonance values</span>
iord <span class="op">=</span> p6 <span class="comment">;and different number of filters</span>
aout <span class="opc">vlowres</span> asig, kfco, kres, iord, ksep
aclp <span class="opc">clip</span> aout, 1, 1 <span class="comment">;avoid distortion</span>
<span class="opc">outs</span> aclp, aclp
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">f</span> 1 0 16384 10 1 <span class="comment">;sine</span>
<span class="stamnt">s</span>
<span class="stamnt">i</span> 1 0 10 .1 5 2 <span class="comment">;compensate volume and </span>
<span class="stamnt">i</span> 1 + 10 .1 25 2 <span class="comment">;number of filters = 2</span>
<span class="stamnt">s</span>
<span class="stamnt">i</span> 1 0 10 .01 5 6 <span class="comment">;compensate volume and </span>
<span class="stamnt">i</span> 1 + 10 .04 15 6 <span class="comment">;number of filters = 6</span>
<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="Credits">
<a id="idp52157160"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Gabriel Maldonado</td>
</tr>
<tr>
<td>Italy</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 3.49</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="vlinseg.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="OpcodesTop.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="vmap.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">vlinseg </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> vmap</td>
</tr>
</table>
</div>
</body>
</html>
distrib
>
Mageia
>
5
>
x86_64
>
media
>
core-release
>
by-pkgid
>
b707d9a4ee443103660a75ccb6e51334
>
files
>
2845
