Abit AB-NV7-133R User Manual page 24

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(9). 6CHAUD1 Header: 6 Channels Audio Header
Note: Watching the pin position and the orientation
(10). CD1 and AUX1 Headers: CD Audio and Auxiliary audio signal input headers
NV7-133R
You'll see this header on NV7-133R motherboard. This
header is designed to connect the CA-20. CA-20 can provide
the analog audio output signals for center channel, subwoofer,
rear right and rear left channel. It also provides one digital
S/PDIF input and one digital S/PDIF output connector.
Another two USB connectors on CA-20 are provided for use
for USB headers. Please refer the description of USB1 on
item (6).
These connectors connect to the audio output of
internal CD-ROM drive or add-on card.
Chapter 2