"Spectre's theme song, "The Writing's on the Wall" by Sam Smith, does not appear on the soundtrack. It was instead issued as a stand-alone single (an instrumental version of the song does appear here). Dynamic, suspenseful, elegant, and cool, the score delivers on just about every other expectation, from the jittery strings, ominous brass, and howling choir of "Backfire" to the eerie electronics accompanying restrained orchestra on the creeping "A Reunion.""