This is a continuation of a sub-thread in Is there no subsonic-compatible media server app for SFOS? – initially asked as a general question, now it has become a little messed up because of simultaneous discussion about both Subsoniq and SubMusic, so I took the liberty of starting a separate thread about SubMusic:
SubMusic | OpenRepos.net — Community Repository System
All the credits go to @ScaleneVirus288 my participation here is mostly to collect feedback and maybe elaborate on the changes I did myself