<?xml version="1.0" encoding="utf-8"?><!DOCTYPE article  PUBLIC '-//OASIS//DTD DocBook XML V4.4//EN'  'http://www.docbook.org/xml/4.4/docbookx.dtd'><article><articleinfo><title>Replay Gain Adjustment</title><revhistory><revision><revnumber>3</revnumber><date>2013-11-25 01:20:08</date><authorinitials>DanONeill</authorinitials></revision><revision><revnumber>2</revnumber><date>2012-10-08 22:15:39</date><authorinitials>localhost</authorinitials><revremark>converted to 1.6 markup</revremark></revision><revision><revnumber>1</revnumber><date>2007-09-19 13:56:40</date><authorinitials>brixeng.brixnet.com</authorinitials></revision></revhistory></articleinfo><section><title>RGAD - Replay Gain Adjustment (class 3)</title><para>Specified at <ulink url="http://wiki.hydrogenaudio.org/index.php?title=ReplayGain_specification#ID3v2">Hydrogen Audio</ulink> </para><screen><![CDATA[        <Header for 'Replay Gain Adjustment', ID: "RGAD">
        Peak Amplitude                          $xx $xx $xx $xx
        Radio Replay Gain Adjustment            $xx $xx
        Audiophile Replay Gain Adjustment       $xx $xx
]]><![CDATA[
        Header consists of:
        Frame ID                $52 $47 $41 $44 = "RGAD"
        Size                    $00 $00 $00 $08
        Flags                   $40 $00         (%01000000 %00000000)
]]><![CDATA[
        In the RGAD frame, the flags state that the frame should be preserved if the ID3v2 
        tag is altered, but discarded if the audio data is altered.]]></screen><para>This is not widely supported and I think it has been superseded by RVA2 in ID3v2.4 (and the XRVA tag for 2.3 compatibility). </para></section></article>