YES. I have turned my #RaspberryPi into the most wonderful media/music server. It's basically my own little super charged and non-capitalistic Spotify.

Here's how it works.

Playing music: It runs #Jellyfin (in a docker container). This is so amazing – it even has a phone app (this is how I listen mostly).

Adding more music:
The Pi has an external drive connected to it (mount at boot) with all my music, shared as a samba server on our home network, this makes it easy to manage the files.