Hi Frank,
Similar to other apps available on the market, Cubasis fully supports class compliant devices.
Here it’s required and up to the audio device manufacturer to make sure, to fulfil Apple’s class compliant standard.
Of course, we’re able to cooperate with Behringer, by providing them with Cubasis promo codes for testing purposes.
Please note that there is another XR18 topic in this forum, where the user successfully uses the XR18 with Cubasis:
Best wishes,
Lars