I have a FF 400 and recently bought (as in last week) a M1 Pro MBP. I went to my rehearsal studio where my FF400 is. Did the whole thing with allowing 3P kernels, and put on the latest RME drivers.
Plugged in the FF400 with the Apple FW800-->TB2 then TB2-->TB3 adapters.
The computer recognizes the FF400 and the ADAT ins... but isn't taking any signal. However, it does take signal from the FF400's SPDIF inputs (I plug my Line 6 Helix in via SPDIF for tracking in the room).
I'm not sure if I have an issue with my Audio/Midi settings or what, but this is super frustrating. We had a jam last night that I really wish I could have recorded.
I'd appreciate any guidance on this front.