V119 of the super flexible, super light and multiplatform (works on a lot more than just a Raspberry Pi) DietPi OS has just been released and alongside a slew of new tweaks and improvements (including a new UltraHQ Driver for the onboard soundcard) there is also now the option to install Plex Media Server: https://plex.tv/

This makes the multimedia lineup available pretty comprehensive

Plex
Kodi
MPD (with YMPD super minimal web interface)
MiniDNLA
Subsonic (V5 and V6)
Squeezebox
Squeezelite
Ampache
Emby - I've not tried this but it looks very nice
Shairport Sync
BruteFIR

If you're a Pi user (or OCDroid, Bananna Pi or a host of other SBC machines) you should definitely give it a go, Lightweight Justice FTW!