5.1 stream to wav

[charlesr]

Is there a way of getting the 5.1 stream off a music DVD and outputing it as 2ch wav? I've tried using dvddecrypter but that only supports 2ch streams.
Can I reroute it through my soundcard somehow and record it on the fly?

[superkully]

AC3Machine will do the job (dunno if anything else is built on the BeSweet base which is better).