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<h1><b>AC3Filter</b><small><i> ver 1.01a_rc5</i></small></h1>
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<td style="text-align: right;"><a href="http://sourceforge.net"><img src="http://sourceforge.net/sflogo.php?group_id=66022&type=5" width="210" height="62" border="0" alt="SourceForge Logo"></a></td>
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<td><img src="pic/flag_eng.gif" width="24" height="18" border="0" align="middle"><b>English</b> </td>
<td><a href="ac3filter_rus.html"><img src="pic/flag_rus.gif" width="24" height="18" border="0" align="middle">Russian</a> </td>
<td><a href="ac3filter_ita.html"><img src="pic/flag_ita.gif" width="24" height="18" border="0" align="middle">Italian</a> </td>
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<td valign="top"><a href="http://prdownloads.sourceforge.net/ac3filter/ac3filter_1_01a_rc5.exe?download">Download</a></td>
<td valign="top"><a href="http://sourceforge.net/projects/ac3filter">Sourceforge project</a></td>
<td valign="top"><a href="http://sourceforge.net/forum/?group_id=66022">Project forum</a></td>
<td valign="top"><a href="http://xvalex.hotbox.ru">Author's
homepage</a></td>
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AC3Filter - it is DirectShow filter for AC3 decoding to play .AVI
with AC3 audio tracks and MPEG2 (DVD). Distributed absolutely for
free (FREEWARE, OpenSource). Sorry if my English is bad, but I think it
is better to have something than nothing.<br>
<br>
<h2>Main features:</h2>
<ul>
<li>Full AC3 standard compliance.</li>
<li>S/P DIF passthrough support.<br>
</li>
<li>Decode MPEG2 PES streams.</li>
<li>Multichannel output support.</li>
<li>LFE support.</li>
<li>Dynamic Range Compression (DRC) support.</li>
<li>Overflow control and automatic gain control.<br>
</li>
<li>Gain levels control.</li>
<li>Bitstream information (channel format, bitrate, sample
rate, coupling freq and maximun freq).</li>
<li>Input/output levels.</li>
<li>Matrix mixer with direct control of mixing matrix.</li>
<li>Stereo to multichannel mixing.</li>
<li><font color="#000000"> DolbySurround/ProLogic/ProLogicII
downmixing.</font></li>
<li><font color="#000000">Delays for each channel.</font></li>
<li><font color="#000000">Equalizer.</font></li>
</ul>
<hr width="100%" size="2">
<h2><font color="#000000">Related projects:</font></h2>
<font color="#000000"> <a href="http://matrix-mixer.sourceforge.net/">MatrixMixer</a> - Allows to
upmix any audio source (not only ac3s) up to 5.1 format (based on
AC3Filter mixing matrix).<br>
<a href="http://winampac3.sourceforge.net/">WinampAC3</a>
- Multichannel Winamp ac3 playback plugin (based on the same decoder as
AC3Filter).<br>
<a href="http://liba52.sourceforge.net/">LibA52</a>
- Crossplatform ac3 decoding library (by Michel LESPINASSE).</font><br>
<br>
<hr width="100%" size="2">
<h2>Contents</h2>
<ul>
<li><a href="#download">Download</a></li>
<li><a href="#install">Install</a></li>
<li><a href="#uninstall">Uninstall</a></li>
<li><a href="#system_setup">System setup<br>
</a></li>
<ul>
<li><a href="#w98">Windows 98</a></li>
<li><a href="#nt4">Windows NT4</a><br>
</li>
<li><a href="#w2k">Windows 2000</a></li>
<li><a href="#vortex">Vortex</a><br>
</li>
</ul>
<li><a href="#player_settings">Players setup<br>
</a></li>
<ul>
<li><a href="#BSPlayer">BSPlayer</a></li>
<li><a href="#ZoomPlayer">ZoomPlayer</a></li>
</ul>
<li><a href="#usage">Filter configuration<br>
</a></li>
<ul>
<li><a href="#main_settings">Main settings<br>
</a></li>
<li><a href="#mixer">Mixer settings<br>
</a></li>
<li><a href="#equalizer">Equalizer & delays<br>
</a></li>
</ul>
<li><a href="#lfe">What is LFE<br>
</a></li>
<li><a href="#cookbook">Cookbook</a></li>
<ul>
<li><a href="#lfe_mix">LFE mixing<br>
</a></li>
<li><a href="#swap_speakers">Swap channels<br>
</a></li>
<li><a href="#max_loud">Maximum loudness<br>
</a></li>
</ul>
<li><a href="#registry">Registry and configuration files<br>
</a></li>
<ul>
<li><a href="#reg_presets">Presets</a></li>
<li><a href="#reg_matrix">Matrices</a></li>
</ul>
<li><a href="#misc">Misc</a></li>
<li><a href="#distribution">Distribution</a></li>
<li><a href="#author">Contact author<br>
</a></li>
<li><a href="#changelog">Changelog</a></li>
<li><a href="#links">Useful links<br>
</a></li>
</ul>
<br>
<hr width="100%" size="2">
<h2><a name="download"></a>Download.</h2>
New versions can be found at site:<br>
<a href="http://ac3filter.sourceforge.net">http://ac3filter.sourceforge.net</a>
- home page<br>
<a href="http://sourceforge.net/projects/ac3filter">http://sourceforge.net/projects/ac3filter</a>
- sourceforge project page (bug reports, feature requests)<br>
<a href="http://sourceforge.net/forum/?group_id=66022">http://sourceforge.net/forum/?group_id=66022</a>
- AC3Filter forum<br>
<br>
<b><b>All versions:<br>
</b></b><a href="http://sourceforge.net/projects/ac3filter/">http://sourceforge.net/projects/ac3filter</a><br>
<b><b><br>
</b></b><b><b>ac3filter ver 1.01a_rc5<br>
</b></b><a href="http://prdownloads.sourceforge.net/ac3filter/ac3filter_1_01a_rc5.exe?download">http://prdownloads.sourceforge.net/ac3filter/ac3filter_1_01a_rc5.exe?download</a> - binary<br>
<a href="http://prdownloads.sourceforge.net/ac3filter/ac3filter_1_01a_rc5_src.zip?download">http://prdownloads.sourceforge.net/ac3filter/ac3filter_1_01a_rc5_src.zip?download</a> - sources<br>
<b><b>
</b></b><a href="http://prdownloads.sourceforge.net/ac3filter/ac3filter_0_69b.exe?download"></a><br>
<br>
<hr width="100%" size="2">
<h2><b><a name="install"></a>Install.</b></h2>
Just run setup program.<br>
<br>
If you are using Windows 98 Simplified Chineese and
filter's property dialog is too small you can try <b>dialog_patch.exe</b>
patch (run it again to revert changes).<br>
<br>
For normal filter operation all accompaniment files
are not required and shipped only for serviceability. The only required
module is <b>ac3filter.ax</b>. This module is also Control Panel
configuration module for itself. For W2K+ it can be registred in
registry key <b>[HKLM\Software\Microsoft\Windows\CurrentVersion\Control
Panel\Cpls]</b>. But for W98 compatibility at installation it is copied
to windows system folder with .cpl extension.<br>
<br>
<br>
<hr width="100%" size="2">
<h2><b><a name="uninstall"></a>Uninstall.</b><br>
</h2>
Just run uninstaller from Start Menu or Control
Panel.<br>
<br>
<font color="#ff0000">! Note that all your saved
matrices, equaliers etc will be lost !</font><br>
<br>
It is possible that filter was installed with one of
codec packs. In this case most simple way to uninstall codec is to
uninstall this codec pack. If you want to uninstall only this codec you
may uninstall it manually:
<ul>
<li>Find ac3filter.ax file.</li>
<li>Unregister this module from command line: >regsvr32 /u
x:\some_dir\ac3filter.ax</li>
<li>Find and delee files ac3filter.ax and ac3filter.cpl</li>
<li>Delete registry key HKCU\Software\AC3Filter<br>
</li>
</ul>
<br>
<hr width="100%" size="2">
<h2><a name="system_setup"></a>System setup</h2>
If installation was successful then in most cases
filter is ready to work immediately and does not require any settings.<br>
<br>
Most compatible mode of operation is stereo mode. It
should work with any Windows version and any sound card.<br>
<br>
Some drivers (Creative!) do not update settings in '<b>Control
Panel->Sounds and Multimedia->Audio->Sound
Playback->Advanced</b>' after speaker configuration change in
drivers. So it is necessary to check it.<br>
<br>
It is possible that some audio processing filter
(equalizers, enhancer, etc) may handle multichannel audio format
incorrectly and cause problems with playback. For example center channel
may fairly disappear or it will be impossible to change speaker
configuration at playback time. To prevent this things do not install
filter-packs and unregister unnecessary filters.<br>
<br>
One of problematic filters is <b>mmswitch</b> filter
(filter that support .avi and DVDs with several audio tracks and allow
to switch between it, especially for multi-language films). If you
mainly watch DVDs it is better to uninstall this filter and use MPEG2
parser wich support stream switching directly (standard <b>MPEG2
Splitter</b> for example). In this case you'll also get lower CPU
usage. If MPEG2 parser does not support stream switching (<b>Elecard</b>
for example) then many audio rendering chains are created, and all of
them are working together when only one is really reproduced.<br>
<br>
If <b>mmswitch</b> is really needed then it is
several possibilities:<br>
<ul>
<li>All audio streams are ac3. For correct stream switching all
decoders must have the same output format.<br>
</li>
<li>First stream is ac3, and second is mp3 (or any other non-
multichannel). Before switching to mp3 stream ac3 must be configured to
16bit stereo.</li>
<li>First stream is mp3 and second is ac3. Before switching to ac3
filter must be confugured to 16bit stereo. You can change output format
after switching.</li>
</ul>
<br>
Some of system settings may be configured from
filter properties page (read <a href="#usage">Filter configuration</a>
to know how to call it):<br>
<br>
<div align="center"><img src="pic/system.gif" title="" alt="" width="628" height="429"><br>
</div>
<br>
<b>* Filter merit</b><br>
<br>
After installation filter have highest priority,
i.e. it will be used instead of any other installed ac3 decoder. If for
any reason it is needed to use other decoder it is possible to decrease
filter's priority to minimal with '<b>Prefer other decoder'</b>. In this
case filter will be used only if it is no other decoders installed. It
is needed for example to use NVDVD player. It can only use its own
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