AMD GA-7ZXR - Manual (Page 47)

Four Speaker & SPDIF Introduction
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SPDIF Introduction
A. What is SPDIF?
The SPDIF output is capable of providing digital audio to external speakers or compressed
AC3 data to an external Dolby digital decoder.
B. How to use SPDIF?
a. Press your mouse right button in “My Computer” and then select the “Properties” item.
b. Click “Device Manager” item.