J.S. Bach: The Well-Tempered Clavier I, Prelude & Fugue No. 19 in A Major, BWV 864 - J.S. Bach: The Well-Tempered Clavier I: Prelude & Fugue No. 19 in A Major, BWV 864: I. Prelude (巴赫：平均律钢琴曲集I：A大调第十九号前奏曲与赋格，BWV 864 - 巴赫：平均律钢琴曲集I：A大调第十九号前奏曲与赋格，BWV 864：I. 前奏曲)