Listen to Elgar: Variations on an Original Theme, Op. 36 "Enigma": Theme - 1. C.A.E. online. Elgar: Variations on an Original Theme, Op. 36 "Enigma": Theme - 1. C.A.E. is an English language song and is sung by Royal Philharmonic Orchestra and Sir Charles Mackerras. Elgar: Variations on an Original Theme, Op. 36 "Enigma": Theme - 1. C.A.E., from the album 101 Romantic Classics, was released in the year 2012. The duration of the song is 3:41. Download English songs online from JioSaavn.