Connect the headset to your PC via the 2.4GHz USB Wireless connection and ensure that you set your Quantum 910 Wireless headset as the default device especially before enabling the JBL QuantumSPATIAL 360 if you haven't installed the QuantumENGINE yet. You can check that the default device is selected under Control Panel > Sound > Playback. Select JBL Quantum 910 Wireless Game, right-click, and select "Set as Default Device"