I have 2 Roon server installations: one on Synology NAS and one one a ROCK device. The playback chain is Roonserver -> Ethernet CAT6 1Gbps network wired -> SoTM SMS-200 Ultra -> Mytek Brooklyn DAC+ -> Amplifier -> Speakers.
I find that when playing from the Synology Roon server there is much better sound quality, cleaner, more depth, smoother highs than when playing from the ROCK server.
I am puzzled as to why this sounds better via NAS than ROCK. The ROCK device has much better hardware (core i3) while the NAS is a Intel Atom device (DS1813+).
I have had a look at the log files in both machines. I found that the drift differs:
Trace: [sMS-200 living] [zoneplayer/raat] sync SOtM sMS-200 (): realtime=2309989355751 rtt=500us offset=1293278355us delta=17us drift=-9086us in 879.1145s (-10.336ppm, -37.208ms/hr)
Trace: [sms-200] [zoneplayer/raat] sync SOtM sMS-200 (): realtime=101336024969793 rtt=500us offset=37670983969us delta=135us drift=-5885us in 152.191s (-38.675ppm, -139.228ms/hr)
Could this be an explanation why the sound quality differs and if yes, what can be done to improve it?