The past and the future. The context in which the work was imagined, refined, practiced, polished, as well as the influence and effects it has on its performers and audience. Intention. Computation may be able to accurately represent much of what actually happens, but it’s much harder to imagine how computation could divine an artist’s intentions for even the exact physical performance of a piece, especially if that artist is not the performer. Insight. Insight arising from novel perspectives unlocked by performing or witnessing, which require the background context of an individual’s life.