Gigabyte GA-7VAXP-A Ultra User Manual page 92

Advanced 6 Channel Analog Audio Output Mode (using Audio Combo Kit,Optional Device):
(Audio Combo Kit provides SPDIF output port : optical & coaxis and SURROUND-KIT : Rear R/L &
Center/subwoofer)
SURROUND-KIT access analog output to rear
channels and Center/Subwoofer channels. It is the best
solution if you need 6 channel output, Line In and MIC
at the same time. "SURROUND-KIT" is included in the
GIGABYTE unique "Audio Combo Kit" as picture.
STEP 1 :
Insert the " Audio Combo Kit" in the back of the case ,
and fix it with the screw.
STEP 2 :
Connect the " SURROUND-KIT" to SUR_CEN on the
M/B.
KT400A Series Motherboard - 88 -