The Requiem by Linkin Park

"The Requiem" is the opening track of A Thousand Suns, and features samples from some of the tracks on the album. The components of the song feature the keys from "Waiting For The End", lyrics from "The Catalyst", the Juno pad from "Jornada del Muerto", and pads from "Blackout".[2] The song builds up with ambience, transitioning directly into "The Radiance". Mike sings through a vocoder on this song, the first time in a Linkin Park song that features prominent use of a vocoder. .