Hi,

I am trying to sort out what I need to do to get my 7.1 Channel Home Theatre System working...

I have the following...

1. Samsung UA55D7000 55” Series 7 LED. http://www.samsung.com/nz/support/model/UA55D7000LMXRD
2. Samsung HT-E6750W (home Theatre)  hooked up the the ARC HDMI input on the tv. http://www.samsung.com/nz/consumer/tv-audio-video/home-theatre/home-theatre-systems/HT-E6750W/XY-spec
3. GeForce GT 220
4. Software Player = XBMC Frodo (v12)

I have been told that I cannot play HD audio with this set-up... best I can do is LPCM to Home Theatre System. Is this correct?

1. Will the Geforce GT 220 decode DTS to LPCM? or What video card do I need to decode DTS to LPCM?
2. What sort of files should I be using AC3, AAC, DTS? What is better?
3. Do I need to plug the HTPC directly into the Receiver? or will ARC do?
4. What will my receiver work with from my HTPC... I see the following in the specs... SO what does DTS mean under "Audio Features"? 

Decoding Formats = AAC, AVCHD, HD JPEG, JPEG, LPCM, MKV, MP3, WMA, WMV(1/2/3/7/9) ,DivX, DivX HD

Audio Features 
# of Sound Modes (DSP) 8
Auto Sound Calibration (ASC)
Dolby Digital
Dolby Digital Plus
Dolby Pro Logic II
Dolby True HD
3D Sound Plus
DTS
DTS 96/24
DTS HD
MP3 Enhancer
Power Bass
Smart Volume
Vertical Surround
User EQ