I just wote a tiny extension that allows you to control Roon Core (, , , , , , , ) from your audio amplifier remote control, having your amplifier connected to a Roon Bridge via HDMI using CEC protocol.
Thanks also from me @Benjamin_Bellamy. I can confirm that the Pulse-Eight USB-CEC adapter works. I’m currently using Manjaro with lib-cec. The only thing that does not work is the FAST_FORWARD button, which is not a problem for me because I’m just using the cursor keys.
For me it is more logical if the button UP responds to FAST_FORWARD and vise versa. So I changed this on my server. But that’s a matter of taste.