Listen to Cello Concerto No. 2, Op. 126: II. Allegretto online. Cello Concerto No. 2, Op. 126: II. Allegretto is an Instrumental language song and is sung by Mstislav Rostropovich, Evgeny Svetlanov and Ussr State Symphony Orchestra. Cello Concerto No. 2, Op. 126: II. Allegretto, from the album ARSM II, Vol. 42. Shostakovich (Live), was released in the year 2017. The duration of the song is 4:13. Download Instrumental songs online from JioSaavn.