<?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>tempoval</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="temposcal.html" title="temposcal" /> <link rel="next" href="tigoto.html" title="tigoto" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">tempoval</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="temposcal.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="tigoto.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry"> <a id="tempoval"></a> <div class="titlepage"></div> <a id="IndexTempoval" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">tempoval</span> </h2> <p>tempoval — Reads the current value of the tempo. </p> </div> <div class="refsect1"> <a id="idm281472878976376"></a> <h2>Description</h2> <p> Reads the current value of the tempo. </p> </div> <div class="refsect1"> <a id="idm281472878975048"></a> <h2>Syntax</h2> <pre class="synopsis">kres <span class="command"><strong>tempoval</strong></span></pre> </div> <div class="refsect1"> <a id="idm281472878902312"></a> <h2>Performance</h2> <p> <span class="emphasis"><em>kres</em></span> -- the value of the tempo. If you use a positive value with the <a class="link" href="CommandFlags.html#FlagsMinusLowerT"><em class="citetitle">-t command-line flag</em></a>, <span class="emphasis"><em>tempoval</em></span> returns the percentage increase/decrease from the original tempo of 60 beats per minute. If you don't, its value will be 60 (for 60 beats per minute). </p> </div> <div class="refsect1"> <a id="idm281472878899000"></a> <h2>Examples</h2> <p> Here is an example of the tempoval opcode. Remember, it only works if you use the <a class="link" href="CommandFlags.html#FlagsMinusLowerT"><em class="citetitle">-t</em></a> flag with Csound. It uses the file <a class="ulink" href="examples/tempoval.csd" target="_top"><em class="citetitle">tempoval.csd</em></a>. </p> <div class="example"> <a id="idm281472878896168"></a> <p class="title"> <strong>Example 1004. Example of the tempoval 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="idm281472700465144"></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> <span class="c1">; Audio out Audio in</span> -odac -iadc -t60 <span class="c1">;;;RT audio I/O</span> <span class="c1">; For Non-realtime ouput leave only the line below:</span> <span class="c1">; -o tempoval.wav -W -t60 ;;; for file output any platform</span> <span class="nt"></CsOptions></span> <span class="nt"><CsInstruments></span> <span class="c1">; Initialize the global variables.</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">1</span> <span class="c1">; Instrument #1.</span> <span class="kd">instr</span> <span class="nf">1</span> <span class="c1">; Adjust the tempo to 120 beats per minute.</span> <span class="nb">tempo</span> <span class="mi">120</span><span class="p">,</span> <span class="mi">60</span> <span class="c1">; Get the tempo value.</span> k<span class="n">val</span> <span class="nb">tempoval</span> <span class="nb">printks</span> <span class="s">"kval = %f</span><span class="se">\\</span><span class="s">n"</span><span class="p">,</span> <span class="mf">0.1</span><span class="p">,</span> k<span class="n">val</span> <span class="kd">endin</span> <span class="nt"></CsInstruments></span> <span class="nt"><CsScore></span> <span class="c1">; Play Instrument #1 for one second.</span> <span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">1</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" /> Since 120 beats per minute is a 50% increase over the original 60 beats per minute, its output should include lines like: </p> <pre class="screen"> kval = 0.500000 </pre> <p> </p> </div> <div class="refsect1"> <a id="idm281472878890904"></a> <h2>See Also</h2> <p> <a class="link" href="tempo.html" title="tempo"><em class="citetitle">tempo</em></a> and <a class="link" href="miditempo.html" title="miditempo"><em class="citetitle">miditempo</em></a> </p> </div> <div class="refsect1"> <a id="idm281472878887800"></a> <h2>Credits</h2> <p>Example written by Kevin Conder.</p> <p>New in version 4.15</p> <p>December 2002. Thanks to Drake Wilson for pointing out unclear documentation.</p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="temposcal.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="tigoto.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">temposcal </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> tigoto</td> </tr> </table> </div> </body> </html>