For the people interested I managed to have a Logitech Harmony remote control Roon and then control the Lumin. Many features can be available and tailored like for example using numbers in the remote to automatically play selected playlists, radios or even particular albums. Maybe this is something planned for the numbers in the Lumin remote but just wanted to share that this already exists, you just need to do some configs
Previous / next tracks can be configured to command Roon/Lumin
Fast forward / rewind can be configured too
I think you can also configure shuffle / repeat but I don’t use it so I don’t know for sure
This is helpful if the volume control is on your amplifier and helpful also with a Lumin if you set the volume control of the Lumin as device volume in Roon
See this
And with the Logitech Harmony remote you can in the same time command your amplifier, preamplifier and almost every device in your room (or even not in your room : with Logitech Harmony, commanding Roon is done over the wifi so need to use a USB receiver which is better for some configurations)
I have been using this with Lumin and Roon since more than one year FYI
And if one day you decide to leave Lumin for a Roon Ready competitor of which streamers work flawlessly with a non Linux DAC (please see below), the Harmony Remote will still work so it is an investment
And yeah also maybe one day you decide to leave streamers and just connect your PC to your DAC to avoid all this Linux/Windows/Mac mismatches. Just know that Logitech Harmony can control your PC as well using Bluetooth this time. So it would be even possible to configure buttons to enjoy surfing on Roon (you can set a button to go on playing now page, set a button to go to queue, a button to toggle playing now display between album art, artist view and lyrics - any keyboard shortcut is configurable in the hardware remote control). All this info just to let you know that Logitech Harmony is a very capable device with half price of the Lumin I think