A lot of my music is from vinyl albums I rip to flac files. (no need to start the vinyl sounds better argument, I just prefer the mastering used for vinyl) but as such there is a lot more artwork options that I would I believe benefit emby for future options such as screen savers and displayed artwork on playback. These options are all available through musicbrainz. (in fact I'll just paste their descriptions from https://musicbrainz.org/doc/Cover_Art/Types Some items are multiple such as poster