- Artist Name: Semicolons are occasionally used in sets to separate names e.g. "Isao Abe; Yuko Takehara". I have only noticed this phenomena with vgmrips VGM sets, and not all of them are like this. All project2612 sets use commas as far as I can tell. foobar2000 renders these semicolons as commas in the playlist anyway, however it still has the effect of the Last FM scrobbler only reading the first artist and not the entire artist field. More unusual is that it does not appear possible to manually change these semicolons to commas within foobar2000's tag editor. This is a meagre concern, but I thought worth pointing out as I'm curious as to what's going on here.
- Genre: Unfortunately this field seems to be unsupported. I only recently started using the Genre field in any way shape or form, for the purpose of creating foobar2000 autoplaylists. It can be very useful/fun if you use multiple hashtags ie. #konami, #rpg, #metal and whatnot. I have a rather extensive #xmas playlist now, and it would be great to include VGM format songs in it as well.
- Composer, Performer, Album Artist: All of these fields are unsupported as far as I know; granted that I have limited use for them. Perhaps the Composer field is useful for those occasions when a game's sound producer is arranging music by someone else and you want their name in the Artist field, but you still want to mention the original composer so that the song appears in media library searches.
- Track Number, Total Tracks, Disc Number, Total Discs: Also seem to be unsupported. Again this is not essential as filenames can pick up some of the slack.
- Non-standard fields: For example, playback statistics like <RATING>, which is particularly useful. Fortunately it's still possible to rate VGMs with foobar2000, but writing this information to the tag is more secure the the long-term than relying on fb2k's database.
Thanks, and once again, thank you all for your tireless efforts in bringing this resource into the public domain.