Native DSD: linux-4.4.9-rt17

[agent_kith]

That's really great!  I hope it works with my Amanero USB input card.  

A lot depends on the Combo384 firmware unfortunately. There is a report of successful native DSD up to DSD128, and DoP up to DSD256 on this board. In theory, it might be possible for you to replace that Combo384 of yours with one from Dom? Maybe that's the best way forward.

Of course doing this will void any warranty on your existing DAC.