Check how the cable is connected to the headset, the 5-conductor plug needs to be inserted into the headset.
Once connected, please check the following:
On PC-
1. Make sure that the default Windows audio drivers are selected as your input/output device.
2. Check your privacy settings and allow Windows access to your microphone.
On consoles-
1. Go to settings and make sure you have the correct input device selected.
For more help with setting up your headset, be sure to check out our Arctis Nova 1 Unboxing and Setup video.
If the mic still is not working after checking the cable and set up, please click here to contact our support.