Your player should allow true high res on its usb input
If you play quobuzz or tidal you will get high res 24 192k sampling which does sound better then a cd at 44k as per your dac it is probably not upconverting but changing pcm to dsd internally and even so a higher data rate sple gives the dacs input a better sample to work with which may still sound superior
You will get far better sound with a much more advanced server
We import the 432evo servers amd they sound amazing and beat both Innous and aurrender see the threads here
https://forum.audiogon.com/discussions/new-dac-or-new-streamer?lastpage=true&page=3#2512774
Also running usb should sound better then spdif as usb offers asyncronous data transmision
DAVE and Troy
AUDIO INTELLECT NJ
US importer 432EVO music servers