You only need SPDIF if you are running Digital audio. The GND is the ground for that same connection - This connection is located on your mother board, Labeled SPDIF. Not a needed connection in most cases.
Hope this helps..
If you need further help, I’m available over the phone at https://www.6ya.com/expert/william_02fc2766c1e13b73
Answers & Comments
You only need SPDIF if you are running Digital audio. The GND is the ground for that same connection - This connection is located on your mother board, Labeled SPDIF. Not a needed connection in most cases.
Hope this helps..
If you need further help, I’m available over the phone at https://www.6ya.com/expert/william_02fc2766c1e13b73