Originally Posted by epontius
Not so far it seems. If set to "mix" it seems to be using the core DTS 5.1 regardless of whether the disc actually contains secondary audio or not.
The behavior is different with Dolby TrueHD. I just popped in "Constantine". It has Dolby TrueHD 5.1 and bonusview with commentary.
When set to "MIX" on S550 and the Disc is set to Dolby TrueHD. The display button shows Dolby TrueHD 3/2.1 48khz. When you enable the bonus view, you see and hear the PIP video/audio and program audio (it's mixed) and the display button still shows Dolby TrueHD 3/2.1 48khz.
So I would think this is the way DTS-HD is supposed
to work as well...but instead shows DTS 3/2.1 .
I would think that if this core 5.1 when set to MIX scenario is the way it is supposed to be that discs with DD TrueHD and secondary audio would behave the same way...it should read DD 3/2.1 48khz.
Since it isn't it leads me to believe that this may be a bug in the way the player is dealing with DTS-HD when set to MIX. Granted they are different codecs, but if it is able to internally decode both formats to LPCM it should be perfectly capable of mixing that decoded audio with the secondary audio before sending it out.
And of course if set "direct" and bonus view is enabled, I get 5.1 LPCM the display button still shows Dolby TrueHD 3/2.1 48khz, but I just don't get audio from the PIP window (as expected).