Yes it would be interesting who is the master clock in the setting RME Digiface/2 D50 dacs. If it's the digiface or the Dacs.
So from the proposed solutions:
RME digiface (370$) need a computer with windows or MacOS and no possibility for linux.
SHD Studio miniDsp (900$) once programmed is a standalone solution. So certainly more stable than a windows pc.
I'm just wondering if we can implement our own convolution filters in the MiniDsp solution or if it is limited to Dirac.