If the hardware (sound card) can works in the Class Compliant Mode, the manufacturer notice this onviously. You have to switch the sound card to special mode. Because it means, your computer (Mac or Windows) will ee it as generic sound card. So you will be not able to use specific software, like Control Panels (or Total Mix on RME).
So, the customer has to set it, and the manufacturer has to prepare the sound card for it.