I've tried a few options over the years, including SMB and NFS, XBMC as well as HTML with javascript I found online.
I don't have a large collection of music (fewer than 100 albums), so hand coding things was actually one of the quicker options to setup. That's despite then hassle of hand coding the URL to each FLAC file as well as the album art. But sometimes the javascript doesn't handle large collections of FLAC and each implementation I tried had different quirks so I've sunk a lot of time into that in other ways without a satisfactory result.
I've heard of Emby, Jellyfin, Plex, Roon and Servio. I just need something that's simple to set up and access. I don't need fancy features beyond the ability to play the music with a pleasant UI that can be accessed from the web (HTTP, not HTTPS). I'd be running this from a Raspberry Pi 3B which already has the lighttpd server running.
I'm also considering just getting a portable, 128GB FLAC player with a minijack connection and moving on with my life without getting involved in networking at all.
Any recommendations for an uncomplicated way to approach to doing this?
Edit: Thanks so much for the helpful and enthusiastic comments! I tried Navidrome and had it up and running in ten minutes thanks to this tutorial video: https://invidious.nerdvpn.de/watch?v=7V5UUJlSknY
I had to install docker-compose on the RPi. Then I got an error which turned out to be because I also needed a separate docker daemon which I installed following these instructions: https://www.simplilearn.com/tutorials/docker-tutorial/raspberry-pi-docker
In just 10+ minutes I had my music collection accessible from all my devices - thanks again!
Plex is probably the easiest and most convenient, I think jellyfin is viable too, but I don't use it.
If you've got the money, Roon or Audirvana are the gold standard of self hosted music
If you want something similar, but free, look into things like volumio or subsonic based solutions.
Seconding Plex / Plexamp if the use case involves streaming remotely. Probably the easiest to get up and running for remote access.
I'm not sure about the capabilities of hosting on a Pi, but it should be straightforward to run a couple different apps in parallel to test and compare features (I'm currently doing exactly that with Plex and Jellyfin)
If you already have a NAS, (since SMB was mentioned, I’m assuming there’s some sort of NAS setup going) then you may even be able to host Plex directly on the NAS. It likely won’t be powerful enough for things like video transcoding, but just audio should be fine.