Mark Ronson may have had success with records and albums, but he is facing one of his biggest musical challenges to date: to create an anthem for London 2012.

The singer and producer has been asked to create a theme for next year’s Olympic Games that will feature on one of the sponsors’ adverts.

It will showcase the sounds of athletes from around the world.

From the bouncing sounds of tennis balls to the whooshing of arrows, Ronson has been jetting across the world, taping microphones to athletes’ legs, arms and chests and trying to make music from all the sweat and training.