Because the sound in dayz is still in development (Only place holder sounds).This is the right time to draw attention on this feature what the new amd cards can do. The programmable sounds nodes are huge step in the new games development. I hope we can hear sounds like the link below in this game: (try with headphones)
http://www.youtube.com/watch?v=nKnhcsRTNME
If this feature got much attention it can be realized!