Linux No Audio or Music Airplay

I am a very long set up surround sound in Eden. It was very difficult - alsa, pulse, mixer and so on. I was hoping that the sound settings in the new version will be similar to Eden. Of course I looked at the new setup, and tried to deal with it. XBMC Frodo playing any music, including multi-channel DTS track (in wav) through my av receiver. But as soon as I try to play a movie, media player dies :-).
In Eden everything worked. When I install xbmc beta I don't reinstall fglrx and changed nothing.
Thanks for your advice! When I have more time, I could make up my mind once again go all the way more meaningful.

and sorry for my english ;-)

- Your speaker setup is really correct
(I use only s/pdif output. I am not used speakers on computer)

- if passthrough: you _only_ enable the audio codecs your receiver supports.
all movies in xbmc have't audio problems before upgrade. (I used optical cable and passthrough and have a 5.1 surround in receiver)

- on fglrx you must disable all HD Audio codecs and "output stereo to all speakers".
unfortunally, I don't know how to tune fglrx. Is there in XBMC setup page or somewhere else in linux?

- select the correct audio output device for analog and passthrough
I use Pulseaudio and generic IEC958 in setup.

which xbmc version did you install and from where? Sounds you are on Eden Xvba now? If so, you should use also Frodo Xvba

I installed Eden-xvba from this topic (~sep 2012):
http://forum.xbmc.org/showthread.php?tid=116996
from repository ppa:wsnipex/xbmc-xvba-eden
I used command line for installing (step 1-3)

(by the way, now I have it again, because yesterday I restored the system and home partitions :-) - the first thing I learned to do in Linux

2 days ago I uninstalled xbmc, removed repository ppa:wsnipex/xbmc-xvba-eden, added repository ppa:wsnipex/xbmc-xvba for installing beta2.
I'm not used command line for installing xbmc and used unity for setting up :-( And something else was installed from this repository together with xbmc.