Digital Audio Connector; Spdif_Out); Optical Drive Audio Connector (4-Pin Cd) - Asus P5KPL EPU User Manual

8. Digital audio connector (4-1 pin SPDIF_OUT)
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port. Connect
the S/PDIF Out module cable to this connector, then install the module to a slot
opening at the back of the system chassis.
The S/PDIF module is purchased separately.
9.

Optical drive audio connector (4-pin CD)

These connectors allow you to receive stereo audio input from sound sources such as
a CD-ROM, TV tuner, or MPEG card.
ASUS P5KPL/EPU 1-27