The Razer BlackShark V2 Pro (2023) doesn’t support Razer 7.1 Surround Sound. Instead, it has THX Spatial Audio integrated into your headset. I suggest taking a look at this link that provides detailed instructions on how to configure THX Spatial Audio on Razer Synapse. Hopefully this helps you get everything set up properly. If you have any other questions or concerns, don't hesitate PM me. Have a good one!