Unknown AlbumArtist showing in tag library for flac files with performer / composer

[Tim Curtis]

Using "Multiple Artists" rather than "Unknown Artist" in the case where the artist array has many entries (and AlbumArtist is empty) makes sense I think.

I'm personally not a fan of the artist array, but I recognise it's utility to those who have more complicated tagging requirements than I do.  I address me preference by always using Artist and AlbumArtist to describe tracks and albums the way I want them described, then removing any other "person of interest" information so the array only ever has "Artist" in it.

But "Multiple artists" doesn't indicate that the issue is a missing AlbumArtist tag. I think most tagging utilities default to setting AlbumArtist tag = Artist or have an option to do so.