Listen to Concerto in E-Flat Major "Dumbarton Oaks": II. Allegretto online. Concerto in E-Flat Major "Dumbarton Oaks": II. Allegretto is an Instrumental language song and is sung by Alexander Lazarev and Bolshoi Theatre Orchestra Soloists Ensemble. Concerto in E-Flat Major "Dumbarton Oaks": II. Allegretto, from the album Stravinsky: Works for Instrumental Ensembles, was released in the year 1985. The duration of the song is 4:59. Download Instrumental songs online from JioSaavn.