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György Ligeti: Étude No. 13: L'escalier du diable / The Devil’s Staircase
Pierre-Laurent Aimard, piano
https://youtu.be/uoLam2O3gtY
Background and interactive score - highly recommended if you want to understand what's going on here:
https://explorethescore.org/pgs/ligeti/inside_the_score/etude_13_l-escalier_du_diable.html