Please make an option to turn off the mic (or mute it) for good. I really don't think it is a good idea to turn it on every time you go to multiplayer. And why can't I choose what mic I want to use (or did I just not see that option) ?
Not all mics have a switch. Trials is automatically choosing my webcam (wich isn't even my default mic), and I have to turn it off every time I go to multiplayer. Nothing to do with Microsoft.