Hi everyone,

I have a Sony DAV-S550 digital decoder/dvd player, as i am sure everyone knows when you play an appropriate DVD with surround sound you can see the specific sound icon appear (either "Digital" or "DTS") on the display screen of the player.
I'm looking at adding a standalone .AVI player (KISS) to connect to my amp, if i connect into my Sony amp via an optical lead and play an AC3 enabled divx movie will i get 5.1 sound out of my amp?
The reason why i ask this question is that for a test i connected my PS2 into the amp via optical lead, when i play a dvd on my PS2, i can only get Dolby prologoc II to come up on the disply (even when i change the settings on my amp from normal surround to auto decode, also Dolby Prologic II is what is displayed when i watch normal tv as well - and i know this is not digital), does this mean that my amp can only decode 5.1 from its own DVD source?

Hope i've made myself clear enough, any replies will be appreciated