If you rip the ENTIRE Blu-ray structure to disk, including menus etc, then DTS HD and TrueHD can almost always be bitstreamed. The exception seems to be where there is a PiP track in which case the C-200 will convert it to LPCM. This should be looked at starting now, the latest firmware did nothing for Blu-ray audio.
If you just copy the largest M2TS file and play the movie without menus etc, then DTS HD and TrueHD won't be bitstreamed; only DTS will be bitstreamed in the cast of DTS HD and nothing much will happen in the case of TrueHD. Not sure what the situation is with conversion to LPCM. This will also most definitely be looked at, but no improvement in the last firmware. "
"Sorry, PiP means Picture-in-Picture, also called Bonus View, which allows two (or more) video streams to be displayed on screen at once, eg the main movie filling the screen and some bloke in a corner telling you how they did that special effect or whatever. In order to hear audio from both the main movie and the special feature at the same time, you need to use LPCM as only one track can be bitstreamed at once and the player can't mix them together into anything but LPCM. Unfortunately, the C-200 can't mix them together anyway (at the moment), so it's switching to LPCM (at the moment) for no good reason. "