<?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>dbfsamp</title> <link rel="stylesheet" type="text/css" href="csound.css" /> <meta name="generator" content="DocBook XSL Stylesheets V1.76.1" /> <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="dbamp.html" title="dbamp" /> <link rel="next" href="dcblock.html" title="dcblock" /> </head> <body> <div class="navheader"> <table width="100%" summary="Navigation header"> <tr> <th colspan="3" align="center">dbfsamp</th> </tr> <tr> <td width="20%" align="left"><a accesskey="p" href="dbamp.html">Prev</a> </td> <th width="60%" align="center">Orchestra Opcodes and Operators</th> <td width="20%" align="right"> <a accesskey="n" href="dcblock.html">Next</a></td> </tr> </table> <hr /> </div> <div class="refentry" title="dbfsamp"> <a id="dbfsamp"></a> <div class="titlepage"></div> <a id="IndexDbfsamp" class="indexterm"></a> <div class="refnamediv"> <h2> <span class="refentrytitle">dbfsamp</span> </h2> <p>dbfsamp — Returns the decibel equivalent of the raw amplitude <span class="emphasis"><em>x</em></span>, relative to full scale amplitude. </p> </div> <div class="refsect1" title="Description"> <a id="idp17662992"></a> <h2>Description</h2> <p> Returns the decibel equivalent of the raw amplitude <span class="emphasis"><em>x</em></span>, relative to full scale amplitude. Full scale is assumed to be 16 bit. New is Csound version 4.10. </p> </div> <div class="refsect1" title="Syntax"> <a id="idp17664072"></a> <h2>Syntax</h2> <pre class="synopsis"><span class="command"><strong>dbfsamp</strong></span>(x) (init-rate or control-rate args only)</pre> </div> <div class="refsect1" title="Examples"> <a id="idp17692224"></a> <h2>Examples</h2> <p> Here is an example of the dbfsamp opcode. It uses the file <a class="ulink" href="examples/dbfsamp.csd" target="_top"><em class="citetitle">dbfsamp.csd</em></a>. </p> <div class="example"> <a id="idp17693136"></a> <p class="title"> <strong>Example 155. Example of the dbfsamp 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> <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> -odac <span class="comment">;;;RT audio out</span> <span class="comment">;-iadc ;;;uncomment -iadc if RT audio input is needed too</span> <span class="comment">; For Non-realtime ouput leave only the line below:</span> <span class="comment">; -o dbfsamp.wav -W ;;; for file output any platform</span> <span class="csdtag"></CsOptions></span> <span class="csdtag"><CsInstruments></span> <span class="ohdr">sr</span> <span class="op">=</span> 44100 <span class="ohdr">ksmps</span> <span class="op">=</span> 32 <span class="ohdr">nchnls</span> <span class="op">=</span> 2 <span class="oblock">instr</span> 1 iamp <span class="op">=</span> p4 idb <span class="op">=</span> <span class="opc">dbfsamp</span>(iamp) <span class="opc">print</span> idb asig <span class="opc">vco2</span> iamp, 110 <span class="comment">;sawtooth</span> <span class="opc">outs</span> asig, asig <span class="oblock">endin</span> <span class="csdtag"></CsInstruments></span> <span class="csdtag"><CsScore></span> <span class="stamnt">i</span> 1 0 1 1 <span class="stamnt">i</span> 1 + 1 100 <span class="stamnt">i</span> 1 + 1 1000 <span class="stamnt">i</span> 1 + 1 10000 <span class="stamnt">i</span> 1 + 1 30000 <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">instr 1: idb = -90.309 instr 1: idb = -50.309 instr 1: idb = -30.309 instr 1: idb = -10.309 instr 1: idb = -0.767</pre> <p> </p> </div> <div class="refsect1" title="See Also"> <a id="idp17696072"></a> <h2>See Also</h2> <p> <a class="link" href="ampdb.html" title="ampdb"><em class="citetitle">ampdb</em></a>, <a class="link" href="ampdbfs.html" title="ampdbfs"><em class="citetitle">ampdbfs</em></a>, <a class="link" href="dbamp.html" title="dbamp"><em class="citetitle">dbamp</em></a> </p> </div> </div> <div class="navfooter"> <hr /> <table width="100%" summary="Navigation footer"> <tr> <td width="40%" align="left"><a accesskey="p" href="dbamp.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="dcblock.html">Next</a></td> </tr> <tr> <td width="40%" align="left" valign="top">dbamp </td> <td width="20%" align="center"> <a accesskey="h" href="index.html">Home</a> </td> <td width="40%" align="right" valign="top"> dcblock</td> </tr> </table> </div> </body> </html>