I have a creative x-fi card (Model sb0880) When I have DTS or Dolby Digital turned off no sound plays while my playback device is SET to speakers. But moving to optical on playback devices will get me 2.1. Thats the interesting part. The sub starts pounding away in the optical 2.1 config. But if I change it back to speakers in DTS, I get a 2.0 config. note as long as I have 5.1 content the sub channel does work. But it comes in very quitely. The gain on my sub has to be turned way up to pick up any LFE levels. However if I switch back to 2.1 mode in playback devices on the optical out, the sub gain is now way too high. I don't get it. I feel like there is a setting im missing in the creative software thats not properly setting the gain up on the sub in 5.1. Perhaps my receiver settings needs the speakers to be changed to small in order for the 5.1 to sent out more bass to the sub? Or I need to increase the sub output from the receiver directly? Heres another problem. I don't have the receivers remote anymore, and its a 16 year old unit with no setup button on the receiver itself. And ebay has turned up nothing in finding a replacement remote. Am I stuck buying a new AV unit?