So I've gone through my library with Picard and tagged 99% of the files with proper MBIDs from the MusicBrainz database. I added the occasional release variation, or obscure artist to the database myself, to get everything I needed. It was a great learning experience and I've got Kodi looking fantastic now!
The only stragglers are a couple of custom CDr mix albums from friends/family, and some unofficial game rip soundtracks. Most release info wouldn't be relevant given the nature of these "albums," but I would still like to have MBID data for artists. Given that these are not the types of albums that should be added to the MusicBrainz database, I would need a way to tag these files without "matching" them to anything. Is there a way to do that?
All I can think of it to lookup some random album in Picard, add my files, then preserve original tags for everything and add the correct MusicBrainz Artist ID. But that seems way too clumsy. I feel like there must be a simpler method that I'm missing (again, WITHOUT adding any entries to the database).