So, MBSEQ supports 64 DOUT + 8 AOUT, while the linked device supports 16 DOUT + 16 AOUT, where is the problem? :-) Not intended as a critical posting, just trying to understand, what the goal is? You can always chain up a few MIDIboxes (not necessarily all of them running MBSEQ) specialized/adapted for your needs, it just needs a bit of programming, but everything is really well documented and easy to do. Many greets! Peter