MSI K9AU Speedster-A4 - Manual (Page 23)

2-11
Hardware Setup
S/PDIF-In Connector: SPDIN1 (Optional)
S/PDIF-Out Connector: SPDOUT1 (Optional)
This connector is used to connect S/PDIF (Sony & Philips Digital Interconnect Format)
interface for digital audio transmission.
S/PDIF Bracket (Optional)
SPDIN1
VCC
SPDIF-In
GND
SPDOUT1
VCC
SPDIF-Out
GND
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