Listen to Elgar: Variations on an Original Theme, Op. 36 "Enigma": Theme (Andante) online. Elgar: Variations on an Original Theme, Op. 36 "Enigma": Theme (Andante) is an English language song and is sung by Philharmonia Orchestra and Giuseppe Sinopoli. Elgar: Variations on an Original Theme, Op. 36 "Enigma": Theme (Andante), from the album The 101 Most Essential Classical Music Pieces Ever, was released in the year 2012. The duration of the song is 1:34. Download English songs online from JioSaavn.