Originally Posted by WirelessGuru
I believe the following is the case:
If you set your digital out to bitstream it is 5.1
If it is set to PCM it will be 2.0
Yes, PCM for SPDIF can be selected (but it is not the default setting). Note that selecting this does not allow the raw AC3 or dts bitstream from SD DVDs to pass straight through to your receiver. If you are actually using the S/PDIF (coax or Toslink) player output it would be odd to select this unless you only have a plain 2 channel stereo audio playback system
Whatever the case it sounds like crap (IMO). If you are stuck with spdif or digcoax I recommend using the DD+ track. I can tell a huge difference when I switch from multichannel to spdif using the True-HD track. I'm not sure what happens to it when it gets downsampled to DTS, but whatever it is it is bad, bad, bad!
While I can hear a difference it is not huge IME. Many others have been pleased with the dts re-encode of TrueHD. Perhaps it is the pure audio/straight path for the 5.1 analog Multichannel through your receiver without any DSP processing? No argument that TrueHD without going back into a lossy codec can be better, especially with side surround sounds having better directivity (easier to localize) during quiet passages.