Concerto for Harpsichord, 2 Recorders, Strings and Continuo No.6 in F Major, BWV 1057 - II. Andante (F大调第6号为大键琴，2把竖笛，弦乐组和通奏低音而作的协奏曲，作品1057 - 第二乐章 行板)