Gigabyte GA-X99-SOC Champion User Manual page 22

Mic In Jack (Pink)
The Mic in jack. Microphones must be connected to this jack.
The audio jacks can be reconfigured to perform different functions via the audio software (supported
functions may vary based on hardware specification).
other audio jack to be Side Speaker out. Only microphones still MUST be connected to the default Mic
in jack. Refer to the instructions on setting up a 2/4/5.1/7.1-channel audio configuration in Chapter 6,
"Configuring 2/4/5.1/7.1-Channel Audio."
Hardware Installation
If you install a Side Speaker, you need to retask
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