I agree. IMO such a project is not only about the initial development, but mostly about the long-term ongoing support. Which is a boring and unpopular chore. Moode seems to be able to provide that. A small but very interesting
https://github.com/project-owner/PeppyPlayers.doc/wiki does that too. Also Volumio is open source. Lyrion Music Server is a large project with history (though Perl not being very popular nowadays). Mopidy
https://mopidy.com/ is a huge long-running project with large community, very extensible. Likely there are quite a few more. Why building a new one, instead of helping one of the existing projects?