Roon audio set-up question w/Allo USBridge and ropieee

Audio Gear Talk RoPieee
1

I have Roon core installed on a Synology 916 connected to a Allo USBridge Signature player w/ropieee feeding a Luxman D-10x. In Roon audio set up my only choice for DSD is DSD over DoP up to DSD256 when both the Allo and Luxman are capable of handling native DSD up to DSD512. What am I missing?

2

Have you tried to play a DSD512 file to see if it works anyway?

3

Yes, Roon tries to downsample to DSD256

5

Is inclusion on this list the under the control of the DAC people or the ropieee people?