複数のシーケンスが微妙にアンコントローラブルに動き続けている中でどれを主旋律として進行していくのか、みたいなやり取りを常に行う感じが非常に脳トレで良かったですね
It was great mental exercise to constantly have to figure out which of the multiple sequences—all moving in slightly unpredictable ways—should serve as the main melody as the piece progressed.