When ever i plug my mic in i cant hear anybody and the peoples mics arent even there but when i unplug it they are talking
Your mic is broken.
While I am 100% sure this doesn’t belong in the Halo 4 forum. I must ask, what kind of mic do you have?
its the regular xbox mic but my mic works with other games just halo 4 it dsont work
Might be your settings in the Halo 4 menu
Turn up your volume.