Hi guys, we've recently finished making an app that is now live, we've launched on Monday, still doing some testing, but it's up and running now, though still beta. It's called Blattarco, an educational app, you can send your music to get feedback and support from professional musicians, teachers, and artists; we have a digital marketplace, additional educational materials for subscribed users, and a lot of other... Source: over 3 years ago

I'm not sure if this would fit all your needs aside from running on Linux but Ampache [1][2] has been around for a very long time and has the ability to mesh with other instances. It started as a small project run by some students at OSU and evolved over time. [1] - https://ampache.org/ [2] - https://github.com/ampache/ampache. - Source: Hacker News / about 1 year ago

Https://ampache.org/ could be an alternative. Source: about 1 year ago

You can also do something such as build a mp3 server on headless Debian install https://ampache.org/. Source: over 1 year ago

Now it's time to make backups of my nextcloud, bitwarden, ampache files. Source: over 1 year ago

Ampache. I've been using it for a while and it's great. I'd suggest using it with Ample, as Ample's UI is better. It supports the Subsonic API, so subsonic clients will work with it. It also supports DAAP and uPnP, for other clients. It has it's own API as well, but not many apps use that. Source: over 1 year ago