In August 2000, Damon Albarn travelled to Mali for Oxfam's On The Line project (about people living along the Greenwich Meridian), intent on getting together with his favourite musicians there. In the capital Bamako and its surrounding villages, he sat in on club and private jam sessions, playing concerts and streetcorners, bars and boats.

Back home in London, more than forty hours of tapes were opened to other influences - reggae, dance, rock - and then the work in progress was returned to Mali, for further contributions from the musicians there: immersive and open, back and forth.