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 Apollo's Fire. Brandenburg Concerto No. 6 in B Flat Major, BWV 1051: I. [Allegro], from the album Bach: Brandenburg Concertos, Harpsichord & Violin Concertos, was released in the year 2010. The duration of the song is 5:40. Download English songs online from JioSaavn.