Listen to Violin Concerto No. 1, Op. 6: II. Adagio online. Violin Concerto No. 1, Op. 6: II. Adagio is an Instrumental language song and is sung by Leonid Kogan, Vassili Nebolsin, Bolshoi Theatre Orchestra and Grand Symphony Orchestra of All-Union National Radio Service and Central Television Networks. Violin Concerto No. 1, Op. 6: II. Adagio, from the album Leonid Kogan. Collection, was released in the year 2018. The duration of the song is 5:34. Download Instrumental songs online from JioSaavn.