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 Rudolf Barshai and Moscow Chamber Orchestra. Concerto in E-Flat Major "Dumbarton Oaks": II. Allegretto, from the album Rudolf Barshai. Collection, was released in the year 2019. The duration of the song is 5:02. Download Instrumental songs online from JioSaavn.