@http://ffado.org
 Fireface UFX 
... Furthermore, to code support for this, physical access to a 
UFX will be required to facilitate debugging. At this stage I (jwoithe) cannot see myself able to afford a 
UFX in the short to medium term for this purpose. We'll have to wait to see ... Support Status:  Planned Manufacturer:  
RME ...
@forum.rme-audio
Topic: Fireface UFX goes Class Compliant!
https://www.forum.rme-audio.de/viewtopic.php?id=16845
Es (RME UFX) geht alles (Class Compliant) bis auf: den HDSPMixer, der wird 
nicht unterstützt. IMHO
@telefonhoerer Und HDSPMixer über Webinterface steuern, ginge das?