Could I suggest something. If you are playing TTT, move into the TTT channel, or even better not use Mumble to play the game at all. This game requires communication and teamwork. With about 12 people shouting heads off in Mumble, not exactly fun in the lobby when not playing the game, plus the many people not on mumble don't benefit. (RDM anyone?) I'm not the only one with this viewpoint, I shall add. Thank you $0.02
I'm going to disagree here, the "serious" communication and teamwork is spoken through the ingame communication means. The communication in mumble is the same rabble you get when people play any game together. $0.02
It's more than what you get from other games, and relies heavily on sharing information more than say prophunt.
i would say dont use mumble at all when playing TTT because if you call someone is a traitor in mumble the other people ingame wont hear it. and you cant ghost. and you cant talk to the playing people when you are dead possibly blocking the communications of people that are still alive.