I would test it out for myself before I would trust tech support, seriously. I called CL tech support asking them the same question about the A2 Value, and you know how many different answers I got? First I got:
No, this card doesn't even have SPDIF input.
Yes, This card does decode DD/DTS on the SPDIF input if card is setup properly.
No, The card only decodes DD, DTS is not avalable on this card.
I am just saying, I used to work tech support and not everybody who answeres the phone knows what they are talking about. Maybe it does, but this would be a major feature to advertise you would think. It would be easy enough to test. Sorry guys, not trying to get off topic.