Lidarr also serves as a music organization tool. You can set up rules for folders and how music files should be renamed. It can also apply metadata tags automatically.

It’s a bit of a process to get it going, but it’s worth it for me so that I can use my phone to cast directly without needing to use a smart home device.

https://howtohifi.com/install-headless-plexamp-endpoint-home-network-raspberry-pi/

I use plexamp as well, I think I bought Plex Pass specifically to have it.

You can install a headless plexamp client onto a Raspberry Pi and have it hooked up to an audio receiver for seamless music casting.