I dont know but I read somewhere that the Alesis AI3 can only function in slave mode. The device has two buttons "optical source" (analog / optical) and "Operating Level" (+4dbu / -10dbv) and I assume it is the slave here.

Is there anything I can do on the FF400 "options" or menu or something to correct the sync issues?

I first plugged the ADAT out from Alesis to ADAT in FF400.

Now I bought another ADAT cable and connected them the other way around too, but the sound is still the same.

Where can I set which one is the Master and which one is the slave? The Alesis has only two buttons so Im assuming I cant do anything there but maybe RME options or menu somewhere?

lovely.

studied the manual and it says that the Alesis indeed needs to be connected both ways to receive clock information - done that.

now back to ff400 - When I do as the manual tells me to, ie click the fire symbol in icon tray to access the Settings dialog for the Master option, my "Settings" dialog looks nothing like in the manual. Instead of the dialog that's supposed to open I get this

I am clearly missing something very obvious here. I would love to click the button that says "set Fireface as Master" but I cant.

Ok. Problem solved even though I dont know why.

I just installed the latest driver you have released for ff400 and rebooted. Now it shows on the "Settings" dialog "Internal" and ADAT is on "Sync". Sound comes through alright.

Any ideas what went wrong earlier? (Besides that the units werent connected both ways at first)