Rharv and Eddie, I see in the screen shots that he has a aud out setting, but does he have the track setup for audio in?

This is what Rharv is saying. By highlighting all three you are forcing it to look at all three inputs.

Click the small arrows on the tracks control area, and see if you can tell if they are setup to input from the fast track


HP Win 11 12 gig ram, Mac mini Sonoma with 16 gig of ram, BiaB/RB 2026, Reaper 7, Harrison Mixbus 11 , Presonus Audiobox USB96