We use the video from a lot of cameras, but never their audio. I know that a lot of users take external audio in via one (1) of the camera inputs. And I can for sure imagine that some users actually switch audio source when another camera input is output (auto mixing). So there is of course a need to be able to specify audio devices for camera inputs. The problem, for at least us, is that we always have to select "None" when adding/changing camera inputs.

I suggest a new Setting/Audio named "New Input's default audio device" with two options:
- None
- Device specific
This also implies that if a input is changed, it's audio device should remain (one could easily select another one if needed.