Asus P4SDX - Manual (Page 30)

1-20 Chapter 1: Product introduction
7. Internal audio connectors (4-pin CD1, AUX1)
These connectors allow you to receive stereo audio input from sound sources
such as a CD-ROM, TV tuner, or MPEG card.
P4SDX
®
P4SDX Internal Audio Connectors
CD(Black) AUX(White)
Right Audio Channel
Left Audio Channel
Ground
Ground
Right Audio Channel
Left Audio Channel
Ground
Ground
8. Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for a S/PDIF audio module that allows digital instead of
analog sound output. Connect one end of the audio cable to the S/PDIF_OUT
connector on the motherboard, and the other end to the S/PDIF module.
P4SDX
®
P4SDX Digital Audio Connector
+5V SPDIFOUT GND
SPDIF_OUT
The S/PDIF module is purchased separately.