Even though you were using PLIIx processing during playback, not EX decoding?
You can't apply surround processing, such as PLIIx, to multi-channel PCM?
Since I've only had any real use for the new audio codecs for about 36 days, I've only run through 30 movies and I myself have not yet encountered a movie that is only in LPCM that is not already recorded in 7.1 but I guess a few 5.1 LPCM movies must be out there.
I recently asked Oppo about this re their analog outs:
Can a 2.1 or 5.1 DVD/BD be expanded to 7.1 through the Oppo analog outs?
This was their reply:Unfortunately no. The player will not upmatrix the number of speakers used. It will only playback the files in the same or less number of channels.
I'd guess they would not be "upmatixing" their digital outs either.