Decoding AC3 to 6 channel wavs

[LiFe]

Hi Guys,
What are the best tools for:

a) Decoding AC3 in a vob to a 6 channel wav

b) Decoding AC3 in a vob to a 2 channel wav with Dolby Surround matrixed in?

Thanks!

LiFe.

[StarRide]

Besweet!
get it from

http://dspguru.notrace.dk/

get the besweet GUI if you are having trouble with the command lines.