Listen to Sonata No. 2 in B-Flat Major, Op. 2: IV. Allegro online. Sonata No. 2 in B-Flat Major, Op. 2: IV. Allegro is an English language song and is sung by Marco Montanelli and Marco Pedrona. Sonata No. 2 in B-Flat Major, Op. 2: IV. Allegro, from the album Best of Tessarini, was released in the year 2015. The duration of the song is 1:52. Download English songs online from JioSaavn.