Displaying Albums where Artist is AlbumArtist and also Trackartist

[stefano_mbp]

… tag name is Artist …. that is used as Artist.merge.
The instruction Artist.merge is to say:
merge with Artist tag all other tags listed in parentheses.
In my files there is ARTISTS tag, easily it doesn’t exist in your files
Try this:
Artist.merge={AlbumArtist}