upgrade from D500 (2xD-Premier) to 1000 Pro

[ogs]

Then I guess your only option is to try Roon's AIR implementation. If that works you know it's the Devialet virtual sound card - or maybe the combination of the Devialet driver, the playback software and your computer.
Roon is free to try for two weeks. Should be enough to find out. Suggest you copy just a few tracks/albums to a new folder and point Roon to this as music directory for the test.