Asus Audio Card Xonar D2X Quick Installation Manual page 9

For Digital Speakers
SPDIF Out
Plug the optical TOSLINK adaptor into the S/PDIF-Out combo connector. Then,
connect your decoder's S/PDIF in port to the optical adaptor with the TOSLINK
optical cable
You can also use a coaxial cable for a S/PDIF connection. Just plug the coaxial
RCA male connector to the S/PDIF-Out combo jack and connect the other end
into the coaxial S/PDIF input on your decoder.
SPDIF In
Plug the optical TOSLINK adaptor into the S/PDIF-In combo connector. Then,
connect your MD/CD/DVD player's S/PDIF out port to the optical adaptor with the
TOSLINK optical cable
You can also use a coaxial cable for a S/PDIF digital connection. Just plug the
coaxial RCA male connector to the S/PDIF-In combo jack and connect the other
end into the coaxial S/PDIF output on the player.
ASUS Xonar D2X Quick Installation Guide
9