Update on Immerse Gamepack: If you installed ANY version of the Immerse Gamepack by Embody, please install their latest version released today
here - I just installed it and seems to be working fine so far. No audio issues or directx 11 crashes with weird sounds. If you still get stuttering/crashes/audio issues and already tried changing the performance settings to "Background Services", please try changing it back to "Programs" and see how it goes with this new release build.
I'll reply again whenever I get another audio issue or directx crash.
If it doesn't work for you, reply to Embody's twitter
here - they're not square enix, so they're not actively reading the forums, and I think they were responsible for these issues. Let them know how it goes.
If you never installed any audio pack, and still get audio issues/crashes, try installing the immerse gamepack. There's a free trial going on, and it "might" solve the problem for you.
Also don't forget to lower your sample rate to CD quality just because.