QNAP NAS TS-453B with Roon Server running, followed by a MX-DAC from Musical Fidelity via USB. Works fine except for DSD audio files (DSD64). Those won’t play and I actually don’t know if my QNAP is able to play DSD (the DAC is). The support first said, no QNAP can play DSD and then corrected themselves with a “yes, they can”, followed by instructions that won’t help even with their own music software. My guess now is that certain models of QNAPs are able to play DSDs and others just are not.
Maybe one of you know more than the QNAP support, as I read about QNAP and DSD here.