This looks like any other denim jacket, with an added decorative element: it has an embroidered keypad sewn from mildly conductive thread over the left pocket. When the keypad is touched it sends a signal to another procesor, which in turn runs a MIDI synthesiser. Sound is projected through mini-speakers in the jacket's pockets. The whole set-up weights les than one pound (454 grammes) with most of that weight coming from batteries and speaker cases.
© Science Museum / Science & Society Picture Library