Volumio is a great project and great idea ! It is exactly the OS/Software I desired for listening to my FLAC Collection. The soft is very good and the dev team is awesome ! I am using it on Raspberry Pi 3 with ifi audio power supply (working with my Pi4 too with the same Micro SD Card). It is linked to a Pro-Ject Maïa DAC (automatically recognized) and to my NAS. I recently buy an official touch screen display 7" and it is now perfect !!!! We can use it with all my family also with app on smartphones and webclients. And a lot of features not experimented yet ! Easy to setup / to use ! Very good stuff Recommended !