I upgraded to Big Sur on my MBP on Sunday. I had an immediate problem with not being to connect to NAS and other devices on my network. I solved that problem on Monday by googling and finding users with same problem, A solution had already been discovered by other users. However my new problem doesn't appear to have a known solution. Suddenly yesterday (Monday) all sound started getting staticky and crinkly. This occurs on bluetooth, wired, and MBP speakers. I reboot and get clear sound for a while then problem starts again. Anyone having this problem? I certainly didn't have this problem Catalina.