<?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>oscils</title> <link rel="stylesheet" href="csound.css" type="text/css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /> <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="osciln.html" title="osciln" /> <link rel="next" href="oscilx.html" title="oscilx" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">oscils</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="osciln.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="oscilx.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry" title="oscils"> <a id="oscils"></a> <div class="titlepage"></div> <a id="IndexOscils" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">oscils</span> </h2> <p>oscils — A simple, fast sine oscillator </p> </div> <div class="refsect1" title="Description"> <a id="id3065890"></a> <h2>Description</h2> <p> Simple, fast sine oscillator, that uses only one multiply, and two add operations to generate one sample of output, and does not require a function table. </p> </div> <div class="refsect1" title="Syntax"> <a id="id3065906"></a> <h2>Syntax</h2> <pre class="synopsis">ares <span class="command"><strong>oscils</strong></span> iamp, icps, iphs [, iflg]</pre> </div> <div class="refsect1" title="Initialization"> <a id="id3066229"></a> <h2>Initialization</h2> <p> <span class="emphasis"><em>iamp</em></span> -- output amplitude. </p> <p> <span class="emphasis"><em>icps</em></span> -- frequency in Hz (may be zero or negative, however the absolute value must be less than <span class="emphasis"><em>sr/</em></span>2). </p> <p> <span class="emphasis"><em>iphs</em></span> -- start phase between 0 and 1. </p> <p> <span class="emphasis"><em>iflg</em></span> -- sum of the following values: </p> <div class="itemizedlist"> <ul class="itemizedlist" type="disc"> <li class="listitem"> <p> <span class="emphasis"><em>2</em></span>: use double precision even if Csound was compiled to use floats. This improves quality (especially in the case of long performance time), but may be up to twice as slow. </p> </li> <li class="listitem"> <p> <span class="emphasis"><em>1</em></span>: skip initialization. </p> </li> </ul> </div> <p> </p> </div> <div class="refsect1" title="Performance"> <a id="id3066659"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>ares</em></span> -- audio output </p> </div> <div class="refsect1" title="Examples"> <a id="id3066674"></a> <h2>Examples</h2> <p> Here is an example of the oscils opcode. It uses the file <a class="ulink" href="examples/oscils.csd" target="_top"><em class="citetitle">oscils.csd</em></a>. </p> <div class="example"> <a id="id3066690"></a> <p class="title"> <b>Example 409. Example of the oscils 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 oscils.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 - a fast sine oscillator.</span> <span class="oblock">instr</span> 1 iamp <span class="op">=</span> 10000 icps <span class="op">=</span> 440 iphs <span class="op">=</span> 0 a1 <span class="opc">oscils</span> iamp, icps, iphs <span class="opc">out</span> a1 <span class="oblock">endin</span> <span class="csdtag"></CsInstruments></span> <span class="csdtag"><CsScore></span> <span class="comment">; Play Instrument #1 for 2 seconds.</span> <span class="stamnt">i</span> 1 0 2 <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="id3066728"></a> <h2>Credits</h2> <p> </p> <table border="0" summary="Simple list" class="simplelist"> <tr> <td>Author: Istvan Varga</td> </tr> <tr> <td>January 2002</td> </tr> </table> <p> </p> <p>Example written by Kevin Conder.</p> <p>New in version 4.18</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="osciln.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="oscilx.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">osciln </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> oscilx</td> </tr> </table> </div> </body> </html>