Listen to Harp Duet: II. Rondo online. Harp Duet: II. Rondo is an Instrumental language song and is sung by Olga Erdeli and Tatiana Shchepalina. Harp Duet: II. Rondo, from the album Olga Erdeli, Harp, was released in the year 1986. The duration of the song is 3:36. Download Instrumental songs online from JioSaavn.