J.S. Bach: The Well-Tempered Clavier I, Prelude & Fugue No. 6 in D Minor, BWV 851 - J.S. Bach: The Well-Tempered Clavier I: Prelude & Fugue No. 6 in D Minor, BWV 851: I. Prelude (巴赫：平均律钢琴曲集第一卷，d小调第六号前奏曲与赋格，BWV 851 - 第一首 前奏曲)