Alright so I have a pair of Skullcandy/Astro Plyr 1's that I use for my PC that has a decoder that uses USB and an Optical cable for 7.1 Dolby Digital.
So for some reason I can't hear my own weapon firing, and this extends from infantry to vehicle weapons as well. Now I can hear other people shoot their weapons in multi-player and I can hear the impact noise at close ranges, I can even hear the shell casing hit the ground I just can't hear the actual round being fired from my weapon.
My headset works fine in AMRA 2 Operation Arrowhead so it is something within ARMA 3 that is preventing me from hearing my rounds being fired. {F20857} {F20858}