I also have this type of problem. My TS also shows that everybody has keyed their mics at the same time. What I have to do is basically have to re-start my computer. Then it is fine again. It doesn't just affect ArmA,,, If I have TS running at anytime it also effects other games that I play. I lose the sound to the games, so I save game, and restart computer and game. I don't turn on TS and then have no problems. I believe that it has to be the TS causing the problem.