It's a very common issue on many games, so I always do that before launching a new game. It just doesn't seem to work for Subnautica. Maybe it's just a sound issue, I don't know. I have what I believe is the same sound problem with The Division.
I don't really understand what you mean by "selecting/revoking all settings under Exclusive Mode". Lowering the audio to 16 bits did not help. I believe the game is running on my integrated graphics even though I'm forcing it to use my Nvidia GeForc…