Looks similar, but is about a Rpi 5, and mine is a RP4. The commands stated in that topic do not work for me…
BTW, now maybe it is clear, why I do need help with this: Mischa's Music Volumio DIY - #5 by BebeMischa
I really want the big screen above the player to display the Now Playing plugin for karaoke reasons… 
Please, people, help! 