Everyone seems to use the MusicBrainz database today, a good thing. We all still have the problem of album disambiguation, though (think of Peter Gabriel, The Beatles, Weezer, …) which can be handled fine using the MusicBrainz release ID, but usually lacks a little support in creating nice file/path names to keep these separated.
Since I’m a strong believer in that everything important should be reconstructable from a file’s tags, I am currently proposing adding two new tags that could be officially supported by programs like MusicBrainz Picard, beets, Mp3tag, foobar2000 and others, to keep things in sync and make it easier for users:
'MusicBrainz Album Comment' (for ID3v2)
'----:com.apple.iTunes:MusicBrainz Album Comment' (for MP4)
'MUSICBRAINZ_ALBUMCOMMENT' (for Vorbis Comments)
'MusicBrainz/Album Comment' (for ASF/WMA)
'MusicBrainz Release Group Comment' (for ID3v2)
'----:com.apple.iTunes:MusicBrainz Release Group Comment' (for MP4)
'MUSICBRAINZ_RELEASEGROUPCOMMENT' (for Vorbis Comments)
'MusicBrainz/Release Group Comment' (for ASF/WMA)
I invite you to take part in the discussion: Ticket PICARD-1617, discussion on the beets forum and Mp3tag forum. It would be great if we could get something going that would also be supported by foobar2000!
N.B.: Picard supports these internally as %_relesecomment% and %_releasegroupcomment%, maybe the same variables could be used (probably without the leading "_")?