Listen to Keyboard Sonata in E-Flat Major, Fk. 5: I. Allegro ma non troppo online. Keyboard Sonata in E-Flat Major, Fk. 5: I. Allegro ma non troppo is an English language song and is sung by Julia Brown. Keyboard Sonata in E-Flat Major, Fk. 5: I. Allegro ma non troppo, from the album W.F. Bach: Keyboard Sonatas, was released in the year 2012. The duration of the song is 5:30. Download English songs online from JioSaavn.