This is a copy of my post over on the Plex forums. Thought some might be interested.
So I've been doing a bunch of other stuff on my Windows HTPC recently and hadn't really tested the new 2011 Mini that I got to replace an 'old' one in one of my rooms.
Today, as I was sitting around by myself checking on some file playback, I decided to test out playback of those BR's I have with LPCM soundtracks (Arlington Road, 3:10 to Yuma, etc), just to see what the Mini would do with them in OS X.
Lo and behold, though the Mini defaulted to the DD soundtracks, when I switched to the lossless soundtracks, they played!!
And, when I check the info pane, here is what I see:
And, on my Onkyo 905, it is displaying 'Multich' and is displaying the appropriate number of channels, which is what it should be displaying when playing back a multichannel cpm soundtrack.
Because of this, we should be able to get pcm playback of all of the other lossless formats by converting them with clown_BD to LPCM in Windows.
For reference, here is an example of what happens when I play back the native DTS-HD soundtrack of American Psycho on Plex:
As you can see on the top line, though you can see at the far right that the source is 2967 kb/s, Plex is just transmitting the DTS core at 1536 kb/s (as expected).
Given these observations, you should be able to play back ALL of your lossless format BR's (and HDDVD's) pn Plex in OS X by ripping your Blu-rays using:
1) a Windows computer
2) Clown_BD and AnyDVD HD
3) just rip it to an LPCM track m2ts file and you're ready to go.
And, for your BR's that were uncompressed LPCM soundtracks to start off with, all you need is MakeMKV to get lossless audio with an HDMI-containing Mac Mini!!
Again, if everybody already knew this, I apologize.