 The soundtrack is composed by the electronic musician Amon Tobin, composers James Dooley and Mel Wesson, and electric cellist Martin Tillman, under the direction of Sony's music manager, Jonathan Mayer. Tobin was specifically brought on board due to his recent trend of blurring the lines between music and sound design as exhibited in his then-recent album, Foley Room. Instead of using traditional instruments, the team sought to use sounds that results from objects that would be found in an urban environment and using such objects in combination with other instruments used in non-traditional manners; for example, bungee cords were strung alongside a bass drum and strummed, and wire brushes were hit against a suspended tuba. The music was divided between Tobin, who worked on the in-game music, and Dooley who worked on the music for the cinematics; the two worked together to make sure common musical themes were present in both aspects. Tillman was brought in late to the process to add the cello sounds, but the group was so impressed with his work that they remixed already-completed pieces to incorporate his contribution further. Manchester music group, Working for a Nuclear Free City were commissioned by Sony to produce a song for the game. The song was penned "Silent Melody" and was used in one of the game's promotional trailers. The soundtrack was released for digital download from the iTunes Store in May 2009.
