I've been trying to set up a subwoofer, but the subwoofer is recognized as a center speaker instead. I read online that there's supposed to be an option to swap center/ subwoofer output or something similar, but the option is just not there. I know it's supposed to be there together with some other options under a picture of the 'setup'. The motherboard I have is Gigabyte GA-Z68XP-UD3P.
Since this option would solve my problem it's really annoying it's not there!

Any answers are appreciated, and thanks in advance!