[MPlayer-users] Can't change audio track

[ACS]

>> Is it supposed to work in dvds dumped on HD?
>> That's the type of file I tried on...
>
> Yes, but not if one of the audio track is AC3 (dolby) and the other
> DTS, or if one of the track is 5.1 and the other stereo.

FWIW, using hwac3 option, I was able to switch between AC3 and DTS decoding 
while playing  DVD from disk.

To topic starter:
Try changing mplayer keyboard mapping file and assign a different key 
instead of #

Adrian Bacon