see this issue: http://feedback.dayzgame.com/view.php?id=23618

and this: http://feedback.arma3.com/view.php?id=18371

Surround Problems are fixed by editing strings in the xaudio*dll files
BattleEye blocks these xaudio files since the update

Why?
It doesn't do that on for ArmA3!

And YES, i already reported it to battleeye support - no reaction (just like bohemia ....)