Listen to Flute Sonata in G Minor, BWV 1020: I. Allegro online. Flute Sonata in G Minor, BWV 1020: I. Allegro is an English language song and is sung by Robert Hairgrove and Alexandre Magnin. Flute Sonata in G Minor, BWV 1020: I. Allegro, from the album Bach: Flute Sonatas, BWV 1020 / BWV 1030 / BWV 1031 / BWV 1032, was released in the year 2013. The duration of the song is 4:10. Download English songs online from JioSaavn.