Hi, although I've been using Ubuntu for a little while now, I'm unsure as to whether using stereo mix is possible while live streaming but not recording, for example via skype, chatroulette, Omegle video chat or Google hangouts for the express purpose of playing music over chat while wearing headphones; choosing the "stereo mix" source as an option for microphones, that is.

If anybody could provide me with some advice or a step by step guide to achieving this, that would be brilliant.