Below are links to a video of the some of the harps in situ as well as footage of Geoffrey constructing and designing them. Naturally it also features sound of the harps.
The movies are the same but of differing quality so that you may select a size suitable for your internet connection and computer.
QuickTime Video low quality
QuickTime Video high quality
A series of stills from the video are available below.
Television footage of Geoffreys 1975 exhibition at the headquarters of the
Chemical Industrial Association in London.