J.S. Bach: The Well-Tempered Clavier I, Prelude & Fugue No. 17 in A-Flat Major, BWV 862 - J.S. Bach: The Well-Tempered Clavier I: Prelude & Fugue No. 17 in A-Flat Major, BWV 862: I. Prelude (J.S. 巴赫：平均律钢琴曲集 I，降A大调第十七号前奏曲与赋格，BWV 862 - J.S. 巴赫：平均律钢琴曲集 I：降A大调第十七号前奏曲与赋格，BWV 862：I. 前奏曲)