Asus DiGiMatrix - Manual (Page 117)

4-13 ASUS DiGiMatrix
P4SQ
P4SQ Audio Connector
SURR_R
LOUT_L LOUT_R
SURR_L GND
LINE_IN_L
T
LINE_IN_R
T
VREFOUT +5V
1
AUD_CON
P4SQ
P4SQ Encoder Connector
EC_CON
COMA GND COMB
Mute GND
8. Encoder connector (6-1 pin EC_CON)
This connector is for the ASUS proprietary encoder board that
controls the system volume.
9. Rear panel audio connectors (10-1 pin AUD_CON)
This connector is for the ASUS proprietary rear panel audio board
that supports the rear panel audio I/O ports.