I suggested in a totally different thread a bit ago about possibly adding Discogs as a meta fetcher...    https://emby.media/community/index.php?/topic/79280-duplicate-music-artists-entries-how-to-get-rid-of-them/   That thread has had a few +1 reply posts.  As such i figured adding it to the feature requests was the proper way to gauge interest.   If you have used MP3tag you should be familiar with Discogs.    Its a GREAT alternative to Musicbrainz.