Alternative for music:

owntone + shairport-sync

Owntone holds your collection on the sever and can stream to airport, airport2, dlna.

Shairport-sync turns a raspberry pi zero 2w, or orange pi zero 2w into an airport {1,2} speaker. Or use a (super cheap) esp32 airport 2 from aliexpress.

Can sync every room in the house with owntone OR "I want my phone or laptop's sound to come out of the speakers in this room"

Owntone has access to your paid spotify account if you want that. Can stream to your phone with http (remotely with wireguard vpn). Also has mpd controls if you want those and can use apple remote app on your phone if you like that.

Owntone, pihole and wireguard is reason enough alone to put an old laptop into service as a home server.