Hi @mehdi_serradj ---- Thank you for the report and sharing this observation you have made with us. The feedback is very appreciated!
Moving forward, to help aide in our understanding of this behavior you are reporting may I kindly ask you for the the following:
-
Please expand on the description of your setup using this link as a guide.
-
Please provide a screenshot of your signal path leaving Roon when you make this observation when trying to play DSD content via Roon.
-
Please confirm that you have the required Win10 driver(s) installed for the UD501 on the mentioned PC. Additionally, if you do indeed have the drivers installed, since noticing this behavior have you tried reinstalling them?
-Eric