All of the music is composed by Metheny (shared credit on one track), and it is one of his most ambitious studio ventures, integrating elements of jazz , rock and world music . On the performing side, it includes contributions from the Pinpeat Orchestra of the Royal Ballet of Cambodia , the London Orchestra and its conductor Jeremy Lubbock, the Choir of the Cambodian Royal Palace , and jazz harmonica player Toots Thielemans . Longtime Metheny collaborator Lyle Mays plays piano on two tracks.