Listen to Brandenburg Concerto No. 6 in B-Flat Major, BWV 1051: I. Allegro online. Brandenburg Concerto No. 6 in B-Flat Major, BWV 1051: I. Allegro is an English language song and is sung by Slovak Philharmonic Orchestra and Rudolf Pribil. Brandenburg Concerto No. 6 in B-Flat Major, BWV 1051: I. Allegro, from the album Bach: The Complete Brandenburg Concertos, was released in the year 2015. The duration of the song is 7:10. Download English songs online from JioSaavn.