<?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>signum</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="shiftout.html" title="shiftout" /> <link rel="next" href="sin.html" title="sin" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">signum</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="shiftout.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="sin.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="signum"></a> <div class="titlepage"></div> <a id="IndexSignum" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">signum</span> </h2> <p>signum — Performs a signum function. </p> </div> <div class="refsect1"> <a id="idm281472890096344"></a> <h2>Description</h2> <p> Returns the signum of <span class="emphasis"><em>x</em></span> returning -1, 0 or 1. </p> </div> <div class="refsect1"> <a id="idm281472890033992"></a> <h2>Syntax</h2> <pre class="synopsis"><span class="command"><strong>signum</strong></span>(x) (no rate restriction)</pre> </div> <div class="refsect1"> <a id="idm281472890031928"></a> <h2>Examples</h2> <p> Here is an example of the signum opcode. It uses the file <a class="ulink" href="examples/signum.csd" target="_top"><em class="citetitle">signum.csd</em></a>. </p> <div class="example"> <a id="idm281472890030152"></a> <p class="title"> <strong>Example 894. Example of the signum 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 usingg command line flags.</p> <div class="refsect1"> <a id="idm281472710344152"></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 oscil.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">kr</span> <span class="o">=</span> <span class="mi">4410</span> <span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">10</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> ga<span class="n">Arr</span><span class="p">[]</span> <span class="nb">init</span> <span class="mi">2</span> <span class="kd">instr</span> <span class="nf">1</span> k<span class="n">Env</span> <span class="nb">transeg</span> <span class="mi">1</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="o">-</span><span class="mi">3</span><span class="p">,</span> <span class="mi">0</span> a<span class="n">_pi</span> <span class="o">=</span> <span class="mi">4</span> <span class="o">*</span> <span class="nb">taninv</span><span class="p">(</span><span class="mf">1.0</span><span class="p">)</span><span class="c1">;</span> a<span class="n">1</span> <span class="nb">phasor</span> <span class="mi">440</span><span class="c1">;</span> a<span class="n">2</span> <span class="o">=</span> <span class="nb">sin</span><span class="p">(</span><span class="mi">2</span> <span class="o">*</span> a<span class="n">_pi</span> <span class="o">*</span> <span class="mi">1</span><span class="o">/</span><span class="vg">ksmps</span> <span class="o">*</span> a<span class="n">1</span><span class="p">)</span><span class="c1">;</span> a<span class="n">3</span> <span class="nb">dcblock2</span> a<span class="n">2</span> a<span class="n">sig</span> <span class="o">=</span> <span class="nb">signum</span><span class="p">(</span>a<span class="n">3</span><span class="p">)</span> ga<span class="n">Arr</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> a<span class="n">2</span> <span class="o">*</span> <span class="mf">0.6</span> <span class="o">*</span> k<span class="n">Env</span> ga<span class="n">Arr</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">=</span> a<span class="n">sig</span> <span class="o">*</span> <span class="mf">0.6</span> <span class="o">*</span> k<span class="n">Env</span> <span class="nb">outs</span> ga<span class="n">Arr</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> ga<span class="n">Arr</span><span class="p">[</span><span class="mi">1</span><span class="p">]</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">3</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="idm281472890025960"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Author: John ffitch</td> </tr> <tr> <td>University of Bath, Codemist Ltd.</td> </tr> <tr> <td>Bath, UK</td> </tr> <tr> <td>July 2013</td> </tr> </table> <p> </p> <p>New in Csound version 6.01</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="shiftout.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="sin.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">shiftout </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> sin</td> </tr> </table> </div> </body> </html>