I have installed RuneAudio 0.5-beta on a Pi2B with HifiBerryDAC+ and hardware volume control, and I have two small issues compared to the 0.3 image I used to run.
1) volume controls in the UI (both Firefox web and Android app): the volume UP/DOWN buttons start to work only AFTER I adjust the volume once thru the wheel, or use the mute/unmute button. BTW : The volume hardware control does work a lot better than in the 0.3 image: "50" means indeed "half", while in 0.3 60 stood for zero sound.
2) the MPD database: it shows a lot of ARTISTS with no albums, and these artists come from the mp3 tag "album artist". In 0.3 I did not see these entries (only those from the "artist" tag. This may be helped by adding a "metadata_to_use" line (with tags to use) in mpd.conf BUT I cannot change the mpd.conf file because it is maintained by RuneAudio! So what to do?
Hope to hear from you!