[vdr] Dolby Digital live 4 speaker

[jonas meyer <shitse@web.de>]

i was able to use ac3dec of alsa to output dolby digital on my 2 stero 
outputs of my sblive. now my problem is that i haven't found a mixer that i 
understand.the rear volume always is far to low compared to front.and i 
haven't found a mixer that is clearly for front/rear or separeted front and 
rear volume.is someone interested to try that,too or able to tell me how i 
have to load modules/set up the mixer ?