PCSX2 SVN r4861 is released. PCSX2 is an open source PlayStation 2 (PS2) emulator for the Microsoft Windows and Linux operating systems. With the most recent versions, many PS2 games are playable (although speed limitations have made play-to-completion tests for many games impractical), and several games are claimed to have full functionality.

PCSX2 SVN Changelog:
r4858
SPU2-X: Added audio expansion support to the portaudio backend. This change also corrects the volume in normal stereo mode.
Removed an useless method from the module interfaces.
r4859
SPU2-X: Added config setting for ProLogic decoding level.
Refactored the ProLogicII code into a separate file and changed it to floating point math for easier debugging.
Added a basic ProLogic decoder that doesn't try to do surround separation into L/R.

The setting does not have a GUI option yet, since the PLII decoder is experimental and doesn't give too good results.
To change it, set DplDecodingLevel to one of: 0=none, 1=ProLogic, 2=ProLogicII. The default is 0.
r4860
SPU2-X: Improved dplII decoder algorithm, it now generates more defined positional balance.
It's still most probably very wrong, but its sounding nice at least. ;P
r4861
SPU2-X: Give some more range to the balancing, I realized its most probably safe for our ears ( an it seems to be based on testing ;P).

Download: PCSX2 SVN r4861
Download: Official Beta Plugins Pack [09 August 2010]
Source: Here