SOLVED: Music is a mess. Please help.

[nothingveryobvious]

So I was going through my music library trying to retrace some of the troubleshooting steps I took when I experienced something along the lines of what you are describing.

Inspect the metadata of the songs (Edit metadata) or albums and look up that ID on the Musicbrainz's website.  Sometimes there are multiple "releases" of an album in different parts of the world and Musicbrainz has separate IDs for each.

I have a couple of the 2 disc special editions of Florence and the Machine's Ceremonials and Lungs albums.  It labeled the songs on disc 2 with disc 1 titles because the "release" it had chosen from Musicbrainz was the single disc edition.  Turns out there were like 20 "releases" of Ceremonials.  My entire library was also run through Picard so the metadata was correct and my folder/file naming scheme conformed to Jellyfin's spec.  This is just one of my examples.  I had to go through my entire library as I listened to it over the course of several months to keep an eye for misidentified songs/albums/artists.  Remixes, special edition discs, lesser known artists were the most common tracks that were misidentified.

I think there are additional folder naming parameters to help JF pick the right release from Musicbrainz.  Either way, there will be additional work to get things in order....I know this first hand.

As to why it worked fine before and not now?  *shrugs*  10.8.0 was my first version of JF.  Different metadata sources?

Thanks for this. I'll take a look at the MusicBrainz ID's. Although I don't know how I'd pick the right one on Jellyfin...