Listen to IV. Allegro - 1 online. IV. Allegro - 1 is an English language song and is sung by Walter Heinz Bernstein, Burkhard Glaetzner, Siegfried Pank and Achim Beyer. IV. Allegro - 1, from the album Bach & Handel: Baroque Chamber and Instrumental, was released in the year 2009. The duration of the song is 2:07. Download English songs online from JioSaavn.