Listen to I. Allegro - 2 online. I. Allegro - 2 is an English language song and is sung by Württemberg Chamber Orchestra Heilbronn, Jörg Faerber, Helmuth Schneidewind, Hartmut Strebel, Susanne Lautenbacher and Martin Galling. I. Allegro - 2, from the album 66 Bach Masterpieces, was released in the year 2011. The duration of the song is 5:14. Download English songs online from JioSaavn.