Yes, my MS200 is connected to DSP, and enjoying full Sooloos experience.

My experiment is with this product JAVS X-DDC and now it is going beyond just Airplay.

This X-DDC (possibly a modern version of the 518) definitely brings improvement in SQ in any source that I pass through to my ears, together with up-sampling feature that seem to integrate quite nicely with my DSP speakers (visual effect too, with the amber lighting).

DSP: DSP6000.2 MKII, Reviver,
Audio: MS200, Super Linear Power Supply 12V1A, SotM ISO-Cat6
Core+Store: ROON on ROCK