I’m using beets via the linuxserver.io Docker image. My library is exclusively FLAC and I’m experimenting with the convert plugin as a replacement for MediaMonkey’s USB Sync feature (transcode mp3s for playback on my car stereo).
I’ve run a few tests and it seems that the Musicbrainz tags for album artist, artist, and disc number are saved to the transcoded file in addition to the standard id3 tag. This results in mp3 files with “Adele; Adele” in the artist field, as an example.
I don’t know if the multiple values will affect the car stereo, but I’d like to understand what’s causing the extra tags to be pushed through.