The third track, "Pulk/Pull Revolving Doors", was built on a Roland MC-505 sequencer with loops of found sounds recorded in the OK Computer sessions. Colin Greenwood explained: "We set up these tape recorders and we disabled the erase heads. We stuck the record head so it kept on recording over and over on top of itself and played keyboard notes into it to create this ghost repetition melody." Auto-Tune was used again, this time to process speech into melody: "You give the machine a key and then you just talk into it. It desperately tries to search for the music in your speech, and produces notes at random. If you've assigned it a key, you've got music."