There are different MIDI standards that map MIDI notes differently to hex values (which is the value that actually matters). The MIDI notes mentioned in the RME Babyface Pro FS manual don’t map to the corresponding hex values sent by the Behringer X-Touch Mini because they seem to rely on different standards. Here is a mapping of the right notes to use on the Behringer X-Touch Mini so that the correct hex values are sent to RME TotalMix FX:

Dim: A 5
Mono: F# 1
Talkback: A# 5 (not tested)
Recall: B5
Speaker B: D 2 (not tested)
Cue Main Out: D 3 (not tested)
Cue Phones 1: D# 3
Cue Phones 2: E 3 (not tested)
Snapshot 1: F# 2
Snapshot 2: G 2
Snapshot 3: G# 2
Snapshot 4: A 2
Snapshot 5: A# 2
Snapshot 6: B 2
Snapshot 7: C 3
Snapshot 8: C# 3
Trim Gains: A 1
Master Mute: G# 1
Master Solo: G 1

More details on my blog post here:
https://soundchaser.org/behringer-x-tou … talmix-fx/

P.S. I found a bug in the Babyface Pro FS manual (https://www.rme-audio.de/downloads/bface_pro_fs_e.pdf) on page 71 where it says Recall is note H6. I believe it was meant to be B6.