<?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>resony</title> <link rel="stylesheet" type="text/css" href="csound.css" /> <link rel="stylesheet" type="text/css" href="syntax-highlighting.css" /> <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /> <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="resonxk.html" title="resonxk" /> <link rel="next" href="resonz.html" title="resonz" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">resony</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="resonxk.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="resonz.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="resony"></a> <div class="titlepage"></div> <a id="IndexResony" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">resony</span> </h2> <p>resony — A bank of second-order bandpass filters, connected in parallel. </p> </div> <div class="refsect1"> <a id="idm281472895161784"></a> <h2>Description</h2> <p> A bank of second-order bandpass filters, connected in parallel. </p> </div> <div class="refsect1"> <a id="idm281472895099112"></a> <h2>Syntax</h2> <pre class="synopsis">ares <span class="command"><strong>resony</strong></span> asig, kbf, kbw, inum, ksep [, isepmode] [, iscl] [, iskip]</pre> </div> <div class="refsect1"> <a id="idm281472895096904"></a> <h2>Initialization</h2> <p> <span class="emphasis"><em>inum</em></span> -- number of filters </p> <p> <span class="emphasis"><em>isepmode</em></span> (optional, default=0) -- if <span class="emphasis"><em>isepmode</em></span> = 0, the separation of center frequencies of each filter is generated logarithmically (using octave as unit of measure). If <span class="emphasis"><em>isepmode</em></span> not equal to 0, the separation of center frequencies of each filter is generated linearly (using Hertz). Default value is 0. </p> <p> <span class="emphasis"><em>iscl</em></span> (optional, default=0) -- coded scaling factor for resonators. A value of 1 signifies a peak response factor of 1, i.e. all frequencies other than <span class="emphasis"><em>kcf</em></span> are attenuated in accordance with the (normalized) response curve. A value of 2 raises the response factor so that its overall RMS value equals 1. (This intended equalization of input and output power assumes all frequencies are physically present; hence it is most applicable to white noise.) A zero value signifies no scaling of the signal, leaving that to some later adjustment (e.g. <a class="link" href="balance.html" title="balance"><em class="citetitle">balance</em></a>). The default value is 0. </p> <p> <span class="emphasis"><em>iskip</em></span> (optional, default=0) -- initial disposition of internal data space. Since filtering incorporates a feedback loop of previous output, the initial status of the storage space used is significant. A zero value will clear the space; a non-zero value will allow previous information to remain. The default value is 0. </p> </div> <div class="refsect1"> <a id="idm281472895089208"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>asig</em></span> -- audio input signal </p> <p> <span class="emphasis"><em>kbf</em></span> -- base frequency, i.e. center frequency of lowest filter in Hz </p> <p> <span class="emphasis"><em>kbw</em></span> -- bandwidth in Hz </p> <p> <span class="emphasis"><em>ksep</em></span> -- separation of the center frequency of filters in octaves </p> <p> <span class="emphasis"><em>resony</em></span> is a bank of second-order bandpass filters, with k-rate variant frequency separation, base frequency and bandwidth, connected in parallel (i.e. the resulting signal is a mix of the output of each filter). The center frequency of each filter depends of <span class="emphasis"><em>kbf</em></span> and <span class="emphasis"><em>ksep</em></span> variables. The maximum number of filters is set to 100. </p> </div> <div class="refsect1"> <a id="idm281472895082584"></a> <h2>Examples</h2> <p> Here is an example of the resony opcode. It uses the file <a class="ulink" href="examples/resony.csd" target="_top"><em class="citetitle">resony.csd</em></a>. </p> <div class="example"> <a id="idm281472895080728"></a> <p class="title"> <strong>Example 827. Example of the resony 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> <div class="refsect1"> <a id="idm281472715966472"></a> <pre class="programlisting"> <span class="nt"><CsoundSynthesizer></span> <span class="nt"><CsOptions></span> <span class="c1">; Select audio/midi flags here according to platform</span> -odac <span class="c1">;;;realtime audio out</span> <span class="c1">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span> <span class="c1">; For Non-realtime ouput leave only the line below:</span> <span class="c1">; -o resonx.wav -W ;;; for file output any platform</span> <span class="nt"></CsOptions></span> <span class="nt"><CsInstruments></span> <span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span> <span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">32</span> <span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span> <span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span> <span class="kd">instr</span> <span class="nf">1</span> <span class="c1">; unfiltered noise</span> k<span class="n">env</span> <span class="nb">linseg</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="o">*</span><span class="mf">.5</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span><span class="o">*</span><span class="mf">.5</span><span class="p">,</span> <span class="mi">0</span> <span class="c1">;envelope</span> a<span class="n">sig</span> <span class="nb">rand</span> <span class="mf">0.7</span> <span class="c1">;white noise</span> <span class="nb">outs</span> a<span class="n">sig</span><span class="o">*</span>k<span class="n">env</span><span class="p">,</span> a<span class="n">sig</span><span class="o">*</span>k<span class="n">env</span> <span class="kd">endin</span> <span class="kd">instr</span> <span class="nf">2</span> <span class="c1">; filtered noise</span> k<span class="n">sep</span> <span class="o">=</span> <span class="nb">p4</span> <span class="c1">;vary seperation of center frequency of filters in octaves</span> k<span class="n">env</span> <span class="nb">linseg</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="o">*</span><span class="mf">.5</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span><span class="o">*</span><span class="mf">.5</span><span class="p">,</span> <span class="mi">0</span> <span class="c1">;envelope</span> a<span class="n">sig</span> <span class="nb">rand</span> <span class="mf">0.7</span> k<span class="n">bf</span> <span class="nb">line</span> <span class="mi">300</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">2000</span> <span class="c1">;vary base frequency</span> a<span class="n">filt</span> <span class="nb">resony</span> a<span class="n">sig</span><span class="p">,</span> k<span class="n">bf</span><span class="p">,</span> <span class="mi">300</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> k<span class="n">sep</span> a<span class="n">sig</span> <span class="nb">balance</span> a<span class="n">filt</span><span class="p">,</span> a<span class="n">sig</span> <span class="nb">outs</span> a<span class="n">sig</span><span class="o">*</span>k<span class="n">env</span><span class="p">,</span> a<span class="n">sig</span><span class="o">*</span>k<span class="n">env</span> <span class="kd">endin</span> <span class="nt"></CsInstruments></span> <span class="nt"><CsScore></span> <span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">2</span> <span class="nb">i</span> <span class="mi">2</span> <span class="mi">3</span> <span class="mi">2</span> <span class="mi">1</span> <span class="nb">i</span> <span class="mi">2</span> <span class="mi">6</span> <span class="mi">2</span> <span class="mi">3</span> <span class="nb">e</span> <span class="nt"></CsScore></span> <span class="nt"></CsoundSynthesizer></span> </pre> </div> </div> </div> <p><br class="example-break" /> </p> </div> <div class="refsect1"> <a id="idm281472895076536"></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> <tr> <td>1999</td> </tr> </table> <p> </p> <p>New in Csound version 3.56</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="resonxk.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="resonz.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">resonxk </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> resonz</td> </tr> </table> </div> </body> </html>