Topic. 
Seriously its ridiculous that Halo as a series doesn’t have fully fledged out sound options. I play with game sound going though my headphones (like i’ve done for years) and when I can’t hear my teammates through my headset because the ingame background noise several decibels louder than they are, there’s something wrong.
I believe Halo Reach didn’t have this problem, where it auto muffled game sound when players spoke or whatever.
I am aware that I am in the minority here, but come on, Halo is the only modern game that doesn’t have indepth options menus and settings.