Its a Roon Ready device Henry its not using USB
So you definitely have it set to Native DSD in the X35 settings menu
option according to your USB Audio DAC spec. -. DSD(DoP): This is for the USB DAC which receive ‘DoP signal’ instead of ‘DSD Native
signal’ -. DSD(Native): This is for the USB DAC which can receive ‘DSD Native signal’ -. PCM: This is for the USB DAC which can receive ‘PCM signal’ only
I did find another post similar to this unsolved from 2020
Might be wise to show screen grabs of Roons device setings for the x35 and show us the device in the audio settings section.