that if you use the in game chat with your fireteam, INSTEAD of a party chat, they tweak your voices like Dinklage on the Ghost. It sounds like youre talking in a helmet over comms. It changes depending on your surrounding environment. Your voice echoes in caves and buildings. Nice addition I must say. Just one of the little things I accidentally learned yesterday. Pretty cool stuff Bungie! EDIT: Here is a clip from where we discovered this the first time. Keep in mind the distortion you hear from Mooses mic at the beginning is just his mic being wonky for a sec. It might happen twice and is in no way part of the in game chat. It's just wonky for a split sec, too loud or too close or something. But you can hear it pretty well. https://www.youtube.com/watch?v=wxiPI_PrOp8&feature=youtu.be