The audio in no longer uses the 'default audio device' for sound output after anniversary update. Even after manually setting the default device, it continues to use the same sound source (even though a different item is clearly marked as default). I have speakers and a headset as my two sound devices and I switch between. I have an alternative sound input source which uses the line-in on the motherboard. It passes through fine to the speakers but after the update I can't get the line-in to go the headset.
This was working fine pre-update.