Yea its even more confusing cause if you put it in 2 channel , you have 2 types of surround, virtual 7.1 and pro logic that can be ON at the same time,
from my experience, I dont like dobly cause it makes the sounds to fake for my taste, when you watch youtube or music it doesn't sound good but had great experience with virtual surround 7.1 on the STX software , I'm just trying to understand if I need to put virtual surround with windows Sonic or just sonic or just virtual surround