All,
I have been in contact with the folks at Roon, urging them to add a dithered volume control as found in Amarra, Pure Music, HQ Player, Audirvana, etc (the current Roon volume truncates bits).
They said they are open to it but need to hear from users in the Feature Requests forum in the Roon support forums. I have posted there in a thread that had already been started by others.
Please take a minute to quickly post that you would also like this feature (if you're a Roon user, you can sign up to use the forums with your existing username and password).
The thread is here:
https://community.roonlabs.com/t/dithered-volume-control/5427/11