Classical albums create extra compilations for metadata tagging. Most usually classical albums consist of a number of works, each containing a number of movements. Sometimes a work contains another work, most notably Opera usually consists of Works, Acts and Scenes. SongKong works well with both Roon and MinimServer but these two applications have different incompatible ways of dealing with multi-level works such as Opera. Roon uses Movement, Section and Work but MinimServer uses Movement, Work, Overall Work, this option lets SongKong switch between the two alternatives.