I dont have any utilities for Dolby Digital or DTS decoding with my XtremeMusic card. I have THX setup in the mixer control though. Do I need to install Creative's DVD playing application to get that support. Also, in entertainment mode I dont get the DTS or Dolby Digital icons on the mock up amp Creative uses. I did a very limited install when installing the drivers as I didnt want too much bloatware installed on my pc. Thanks Guru's P.S. In the meantime I have been using Purevideo & WMP to play my Dolby Digital DVD's. I would like to see the difference if it was using the hardware decoding offered by my X-FI.