Synapse 4 does not recognize the Windows default audio device. In Windows settings and Control Panel, the correct headset, BlackShark V2 Pro (old one), is selected, but Synapse 4 constantly asks for the headset to be set as the default. This causes none of the headset settings to work—no THX, no mic, volume, or EQ. All required software, like the THX module and APO, is installed.
Several reinstalls, restarts, etc., did not help.
Everything works in Synapse 3.
PS: Running the latest ver of the app and Windows 11 latest up-to-date.