[Audio] Use windows current audio device and audio profiles.

[ffsource]

I would like to request a way to use the currently active audio device... Many times I record some gameplay but forgot to change the audio and I end up with a no audio video, using a "catch all" audio device would be really useful (just like in games where you dont select the audio out but it plays through whatever is active at the moment).

Also a way to activate multiple audio inputs on/off for example: a MP game has a mic input, game audio and skype audio but a single player game has only the game audio... it would be awesome to have a hotkey to swtich between a MP audio profile and a SP audio profile.

Thanks.