I want to hear your opinion what gives better sound (playing mp3 on stereo to 5.1) X-Fi CMSS-3D or Dolby ProLogic II, to hear sound on all speakers in 5.1 home theater. Tnx.
If you're going digital out from card to an external HT receiver, I see no reason not to select ProLogicll in the receiver if you want the surround effect for 2channel music.
Bottom line to your question: All other variables aside, I would choose the ProLogicll.