I was wondering about the Madiface Pro, in particular an FS version. It really is the perfect interface for me. I don't know much about they details of MADI though, my understanding is the clock information is encoded in the data stream, in which case if I were using an external unit connected via MADI, would the FS clock actually offer anything?
As I understand it, an RME device with steadyclock would refresh the clock signal received via MADI and perform the AD/DA conversion with its own internal clock. If I remember right currently there is no RME converter/mic preamp with internal FS clock available. So in this case I think the FS clock on the recording interface side would not have any impact on the conversion quality of a RME preamp or AD/DA converter as such a device with Steadyclock is decoupled from the original clock. It already makes the best out of such a clock signal, removes the jitter, refreshes the clock signal.
Preamps/converter from other vendors without steadyclock technology will most likely use the clock signal which is embedded into the MADI data. In this case it is for me questionable whether the high precision of an internal FS clock can be maintained through MADI, because data (and the embedded clock signal) then goes through other network components / circuits (MADI). Perhaps RME can shed some light on whether my understanding is correct here.
I personally would not depend too much on the presence of FS clock. In various discussions about ADI-2 Pro the consensus is, that it admittedly provides better measurement values but doesn't deliver audible advantages.
UFX+, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1650v4, Win10Pro21H2, Cub12Pro