Concerto for Harpsichord, Strings, and Continuo No. 4 in A Major, BWV. 1055 - piano performance - I. (Allegro) (A大調第4號大鍵琴，弦樂團與通奏低音協奏曲，作品1055 - 鋼琴演奏 - 第一樂章 （快板）)歌詞