Apologies I misread the RME babyface at the start! You shouldn’t connect the Dubler mic to the interface, it should just connect directly to your computer. You should then use the audio drivers from your Babyface in whatever music making software you are using Dubler with
Dubler is just a MIDI controller and so doesn’t generate any sounds itself, can I ask where are you experiencing the latency and what software you are using Dubler with to make music?
If you prefer please feel free to drop us an email to help@vochlea.co.uk and we can open a support ticket and discuss on there! I’d also be happy to arrange a video call if you want to go through the setup in person