Honestly, my goal is not to get rid of any user interface. But my home automation system has a very small screen, which would not allow to display much information. That’s why I need something able to play my music without watching at any screen.
The obvious choice for someone who knows many music players on Linux is MPD (Music Player Daemon). This tool is a daemon running in the background and playing whatever we want it to play. Perfect for my needs. But it needs a client to tell it which tracks to play. There are many clients which are able to control a MPD server (on computers, phones, tablets…) but I don’t see « power up a computer and tell the mediacenter to play some files » as an option.