Colter

You can stop the breathing on the speakers by changing your sound levels. I forget which volume setting it is, but it is where you adjust the volume to the speakers from various inputs. You want the speakers to get everything EXCEPT your mic. When you breathe in it, it will only broadcast to your speakers if it is not muted. You can mute them one at a time and test until you find the one going to the speakers. That way it will still be heard in game, but you wont hear it over the speakers. You might also want to turn down your pickup sensitivity or fellow players will hear you like Darth Vader.

Colter