Touch Wood Commercial “Jesu, Joy of Man’s Desiring” (Bach) - I can’t think of any possible way of re-interpreting this song other than this. It brought a tear to my eye. 

“A track of pitches makes a wooden ball into a mallet, traversing a track as it is driven by gravity. The keys of that track become a xylophone, the traversal of space sequencing notes in time.”

We take for granted modern digital sequencers, especially MIDI. The video, makes me reflect back the beauty of it. 

“Computing, after all, owes its very existence to tangible, mechanical constructions first developed for textile manufacture. MIDI is often derided for being simplistic, but in that same simplicity is the elegance with which we can store musical idea - a simple representation of relative pitch in time is often enough.”