AlbumArtist for top level and Artist for Compilation view

[simoncn]

Try changing indexTags to:

indexTags: AlbumArtist:Artist, All Artists, -Date, Compilation=1, Genre, #AudioQuality:Audio Quality

When you browse the top-level view, use the Artist index (actually your AlbumArtist tags). When you browse compilations, use the All Artists index (actually your Artist tags). This should be close to what you want.