I'm trying to run Volumio 3 on a Raspberry Pi 4 with HiFiBerry DAC2 Pro and Usparkle 15.6" touchscreen, with the analog audio output going to an inexpensive 300W stereo amp. I'm building all this to put in an old radio cabinet to make a kind of modern juke box. The DAC2 Pro is not selectable in the Volumio options, but the DAC+ Pro setting seems to work well. The sound is kind of thin, and lacking an integrated software equalizer of any sort in Volumio doesn't help. I had to add an outboard car equalizer to make it listenable. It sounds good now. Volumio doesn't work with my existing '.M3U' playlists, so I've had to figure out how to port them over to the format that Volumio uses. I'm able to listen my library of 10,000+ songs ripped from CDs and vinyl all loaded on a NAS. Volumio shuffles them well. Improvements I'd like to see in Volumio are the ability to sort the music library by Year, the addition of the aforementioned equalizer, and the ability to calibrate the touchscreen, though, I realize that isn't really Volumio's problem.