<?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>rtclock</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="rspline.html" title="rspline" /> <link rel="next" href="s16b14.html" title="s16b14" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">rtclock</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="rspline.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="s16b14.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry" title="rtclock"> <a id="rtclock"></a> <div class="titlepage"></div> <a id="IndexRtclock" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">rtclock</span> </h2> <p>rtclock — Read the real time clock from the operating system. </p> </div> <div class="refsect1" title="Description"> <a id="id3169677"></a> <h2>Description</h2> <p> Read the real-time clock from the operating system. </p> </div> <div class="refsect1" title="Syntax"> <a id="id3169690"></a> <h2>Syntax</h2> <pre class="synopsis">ires <span class="command"><strong>rtclock</strong></span></pre> <pre class="synopsis">kres <span class="command"><strong>rtclock</strong></span></pre> </div> <div class="refsect1" title="Performance"> <a id="id3169718"></a> <h2>Performance</h2> <p> Read the real-time clock from operating system. Under Windows, this changes only once per second. Under GNU/Linux, it ticks every microsecond. Performance under other systems varies. </p> </div> <div class="refsect1" title="Examples"> <a id="id3170638"></a> <h2>Examples</h2> <p> Here is an example of the rtclock opcode. It uses the file <a class="ulink" href="examples/rtclock.csd" target="_top"><em class="citetitle">rtclock.csd</em></a>. </p> <div class="example"> <a id="id3170653"></a> <p class="title"> <b>Example 537. Example of the rtclock 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</span> -odac -iadc <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 rtclock.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> 44100 <span class="ohdr">ksmps</span> <span class="op">=</span> 1 <span class="ohdr">nchnls</span> <span class="op">=</span> 1 <span class="comment">; Instrument #1</span> <span class="oblock">instr</span> 1 <span class="comment">; Get the system time.</span> k1 <span class="opc">rtclock</span> <span class="comment">; Print it once per second.</span> <span class="opc">printk</span> 1, k1 <span class="oblock">endin</span> <span class="csdtag"></CsInstruments></span> <span class="csdtag"><CsScore></span> <span class="comment">; Play Instrument #1 for two 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" /> Its output should include lines like this: </p> <pre class="screen"> i 1 time 0.00002: 1018236096.00000 i 1 time 1.00002: 1018236224.00000 </pre> <p> </p> </div> <div class="refsect1" title="Credits"> <a id="id3170700"></a> <h2>Credits</h2> <p>Author: John ffitch</p> <p>Example written by Kevin Conder.</p> <p>New in version 4.10</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="rspline.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="s16b14.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">rspline </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> s16b14</td> </tr> </table> </div> </body> </html>