"Multiple Jacks" is a musical theme composed and conducted by Hans Zimmer for Pirates of the Caribbean: At World's End. It appears as track four on the film's soundtrack, at 3:51 in length. The track begins with ambient tones and springy-sounding bass elements, along with a low guitar tone, before seguing into a quirky refrain of "Jack Sparrow" on harpsichord and plucked strings (00:39). This refrain is repeated, and leads to a rendition of Jack's introductory theme from "The Medallion Calls" (01:33). Electronic pulses and percussion begin are introduced, gaining in speed until the end of the track.