I have been having this problem for over a month. About a month ago while in a party everyone couldn't hear me talk while I could still hear them . My mic was still working the mute button was working (and it was not on) the volume buttons worked fine. Anyway I threw that mic away and bought a new one. SAME thing. I told Microsoft and they sent me a new controller thinking its my controller yet no it was not. Even with new controller same thing. I have talked to Microsoft believe me . I have went through everything. EVERY troubleshooting , deleting cache, re setting , re starting my router, checking my latency, finally Factory Default so my xbox is "brand new" and still nothing. I really need help.