ac3filters problem...

I recently bought the SB Audigy 2 7.1 and I am having problems with movies in AC3.. 1)I can't hear the voice anymore, I guess it's because ac3filters support just 5.1 soundcard 2) If I set the speakers in ac3filters like Dolby Surround I can hear the voice but I think I am not using a real 5.1/6.1/7.1 In each case, the volume is loud for the first 5 min, than it goes lower and lower. So, is there a way to use 7.1 dolby? If not, how do I set it up? And how can I keep the voice from going lower? Please, would you help me!? Thank you in advance..

please..why doesn't anybody answer? it's very important for me..

Sorry, don't have one. Seems to me that is a question for the Creative tech support, not a forum on video encoding.

You can also try ffdshow to playback ac3 files. I've got some problems with ac3filter and this way it's solved.

Alright..I solved the problem. I had to turn off the "normalize" option. Now audio is decoded in 5.1 and is always loud. But I have another problem!! There are too many basses..I can't turn them down..any idea? thanks