'Lis Rhodes has conducted a thorough investigation into the relationship between shapes and rhythms of lines and their tonality when printed as sound. Her latest work, Light Music, is in a series of movable sections. The film does not have a rigid pattern of sequences and the final length is variable. The imagery is restricted to lines of horizontal bars across the screen: there is variety in the spacing (frequency), their thickness (amplitude), and their colour and density (tone)'. - William Raban, extract from programme notes for Perspectives on British Avant-Garde at Hayward Gallery, 1977.