no voices in cut scenes

[alpdemo]

I've been playing battlefield 4 campaign and it works fine untill the end/start of a mission where you see the uss valkery (cutscenes). For some reason I can't hear the voices of the ppl that are talking but I have the subtittles and any other sound. I don't know if this is a bug or its just my version but its getting annoying to play a game that I can't hear "valubole" info 

Not a big deal but it would be great if there was a update or a way to fix it