Listen to Violin Concerto: I. Andante - Allegretto online. Violin Concerto: I. Andante - Allegretto is an Instrumental language song and is sung by Leonid Kogan, Gennady Rozhdestvensky and Grand Symphony Orchestra of All-Union National Radio Service and Central Television Networks. Violin Concerto: I. Andante - Allegretto, from the album Bach & Berg: Violin Concertos, was released in the year 2014. The duration of the song is 10:35. Download Instrumental songs online from JioSaavn.