One of the really underrated features of ACRE is that it lets you force audio to only play on left/right ear. In Arma, if I'm talking to a character directly in front of me while while listening to 2 radio channels that have people shouting in mono, it all turns into a muddled mess of sound. If I have someone directly in front of me, one radio only going into my left ear, and one radio only going into my right ear, my brain can handle conversations without feeling too overloaded.