Good morning , i have a trouble with mumble , i can speak without game on but when i open a game mumble cut.
So i cant speak but can hear.
Same with TeamSpeak , and my solution i find with TS is to uninstall TS and reinstall when the game open and after i can speak and hear all people.
mumble is a positional audio program, if you are not near some one ingame you cannot speak to him unless you use force center
when using push-to-talk you will only transmit to other ppl that are right next to you ingame (and use mumble too ofc)