2012-11-13, 13:01
This patch is now redundant hence the lack of activity on this thread. HD Audio has been a native part of XBMC since the new audio subsystem AudioEngine (AE) was merged in the May development window, so has been in all the nightly & monthly alpha builds since then.
More on AE at http://wiki.xbmc.org/index.php?title=AudioEngine
More on AE at http://wiki.xbmc.org/index.php?title=AudioEngine