Foxconn NF4UK8AA series User Manual page 105

Appendix
STEP 3. After installation of the audio driver, you'll find an icon on the taskbar's
status area. Double click the icon, you will see the following picture.
Click here
STEP 4. Click icon. The following picture will appear.
Click here
STEP 5. Make sure you select "7.1 Speakers" from the above picture. Now you
can enjoy the 8-channel audio function.
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