Gigabyte GA-6CXC7 User Manual page 54

c. Two speaker (Default)
d. Click "Four speaker" item.
C. Four Speaker Application
The four speaker function will only support in application software that use Microsoft DirectX and
Creative EAX. For example, the game titles, software DVD player and MP3 player. Those
software support Microsoft DirectX, so they can support four speaker output.
Four Speaker & SPDIF Introduction
46