Listen to Organ Sonata No. 1 in E-Flat Major, BWV 525: I. Allegro online. Organ Sonata No. 1 in E-Flat Major, BWV 525: I. Allegro is a French language song and is sung by Jacques Amade. Organ Sonata No. 1 in E-Flat Major, BWV 525: I. Allegro, from the album Bach - Soli Deo Gloria, was released in the year 2004. The duration of the song is 2:50. Download French songs online from JioSaavn.