Having some issues with this card in Windows 11 - If you switch to direct mode the volume slider in the app and windows itself no longer works and if you then try and turn direct mode off again it fails to detect your card until you reboot your PC. I think the drivers aren't really suitable for windows 11 at the moment
According to the SoundBlasterOfficial Reddit channel, their techs are aware of the issues related to direct mode in Windows 11 and are working on a solution