Listen to Concerto for Diatonic Harmonica & Orchestra: II. Theme and Variations online. Concerto for Diatonic Harmonica & Orchestra: II. Theme and Variations is an English language song and is sung by Czech National Symphony and Howard Levy. Concerto for Diatonic Harmonica & Orchestra: II. Theme and Variations, from the album Concerto for Diatonic Harmonica & Orchestra, was released in the year 2011. The duration of the song is 5:42. Download English songs online from JioSaavn.