hello same here i just bought the game
i have win 10 all up to date with realtek high definition drivers : 10.0.18362.1 2019 drivers
my motherboard have 2016 one so i think the most recent is better
and i played more than 100 recents games on win 10 and never had 2.0 on 5.1 windows settings
i send a ticket to support, i hope to have a solution fast and post it here
because i don't find any solution on web