Listen to Organ Sonata No. 4 in E Minor, BWV 528: III. Un poco allegro online. Organ Sonata No. 4 in E Minor, BWV 528: III. Un poco allegro is an English language song and is sung by Ivan Sokol. Organ Sonata No. 4 in E Minor, BWV 528: III. Un poco allegro, from the album Classical Bach 4, was released in the year 2017. The duration of the song is 2:31. Download English songs online from JioSaavn.