Question about the licence model and browsing through music

[simbun]

The reason you're having to fight this so much to get what you want is because you're storing the main artist in the Artist tag for Music. If you stored it in the AlbumArtist field (which is the standard) you'd then be able to use AlbumArtist in the indexTags instead of Artist and then you'd get the functionality you're looking for because the AlbumArtist index ONLY looks at AlbumArtist.

Make the change in a test environment and have a look. You'll also need to change any reference from Artist to AlbumArtist in the other options e.g. Album.sortTags={AlbumArtist, Date, Album}.

This would also mean your Podcasts, Radio Plays e.t.c. would sort by Date, Album (because AlbumArtist would be blank for them).