Les Escaliers Mécaniques is a piece for ten performers and two escalators – one up, one down. The performers simply go up and down the escalators in various combinations, but a video camera tracks their position, direction and speed which in turn triggers computer synthesised sounds. There are five possible modes of movement, stand on the up escalator, walk up the up escalator, stand on the down escalator, walk down the down escalator, and walk in the wrong direction on either escalator, i.e. stationary. Each performer controls a distinct set of sounds responding in a particular way to their movements. The result is a musical work where a world of sonic visual relations is explored through site specific choreography.