In My Halo 5 game during campaign whenever my fireteam is speaking or anyone else it is extremely quiet. During cutscenes it is normal. I did check my video/audio settings and even restarted my xbox. Any help?
I know you said you checked the settings, but are you sure “Voice-Over Volume” is set to 10?
Also make sure you don’t have the Xbox set to surround sound (i.e. Expecting a center channel) if you are just using stereo speakers.