Listen to Symphony "A" in B-Flat Major, Hob. I/107: I. Allegro online. Symphony "A" in B-Flat Major, Hob. I/107: I. Allegro is an Instrumental language song and is sung by Mark Ermler and Bolshoi Theatre Orchestra Chamber Ensemble. Symphony "A" in B-Flat Major, Hob. I/107: I. Allegro, from the album Haydn: Symphonies "A", "B", Nos. 1 - 3, was released in the year 1990. The duration of the song is 5:13. Download Instrumental songs online from JioSaavn.