I’ve been having my own different audio adventures recently. On my travels I seem to remember reading something about dual boot affecting audio for someone, and that person discovered that entering UEFI Setup before booting temporarily “fixed” the issue. Possibly they had to (redundantly) use the boot override settings there to select Linux for the next boot, but I’m not sure and unfortunately I don’t seem to be able to find the page where I read this now. 
Incidentally, it may be helpful to provide some information on your hardware.