Dark Matter is a performance with light as the main character and a soundscape composed by Dr Jeremy Mayall with Martyn Roberts. The theatre space is extremely dark with all care taken to eliminate all visible light. The audience, unable to even see their hands in front of them, are seated in a void, viewing low beams and shapes of light, with ghostly movements from two dancers resembling wraiths from another world. The sound forms an integral part of the performance; because so much has been taken away from them visually, the heightened sensory experience of the audience amplifies the sonic and visual perception. In this article, Mayall and Roberts discuss that process and describe the impact on the audience of the work as a whole.