Uh, holy shit, I played through a good 2/3rds of the game without ambient sounds, I watched a clip and realised I didn't have them working, jesus, what a difference it makes, you barely notice them being gone but having them play adds so much to the atmosphere. Farron would've been a much different experience with them for sure. Oh well, at least that's fixed, bonus is that the latest drivers have virtual surround support for any headphones and lets you turn audio normalization off if you use Dolby Digital Plus.
Such a weird issue too, these days sound typically either works or it doesn't work at all. Oh well, fixed it in time for the DLC at least, pretty sure ambience is going to play a large part in what looks like a pretty barren world to explore