GREGORIAN: PURE CHANTS LIVE IN PRAGUE is a concert special features the iconic choir performing traditional songs as well as "pure" acoustic versions of fan favorites over the years, including "In Trutina" and "O Fortuna" from Carl Orff's opera Carmina Burana, "Ode to Joy," beautiful arrangements of their versions of Coldplay's "Fix You", The Beatles' "In My Life", Simon & Garfunkel's "Sound of Silence",� and Enigma's "Sadness Pt.