collaborative music-creation artwork consisting of four adjacent stations, each comprising a small podium bearing a computer mouse, a 16-by-16 grid projected onto the floor from a video projector above, and a cursor connected to the mouse. Dots can be placed in each of the grid's cells by clicking with the mouse. A synchronized bar sweeps across all the grids simultaneously, triggering musical notes wherever a dot has been placed. Sound is relayed over a loudspeaker system, and the notes from all four stations are superimposed, although each station has its own musical tone. This work was shown at the Serious Games exhibition at the Laing Art Gallery, Newcastle in 1996 and 1997 and at the Barbican Arts Centre, London in 1997. In Piano - As Image Media (1995), audience members operate a trackball to draw lighted dots on a grid projected onto a sheet of fabric that leads to the keyboard of a small grand piano. The dots move towards the piano keyboard, and as they come close to it they accelerate and strike a key. The piano, controlled by a computer, plays the note corresponding to the 'struck' key, and at the same time a computer-generated graphical figure appears on another sheet of fabric suspended above the piano, appearing to fly out of the piano and up into the air. This work, along with Composition on the Table, was shown in the Play Zone at the Millennium Dome in London, 1999–2000. It was also one of the works used in Iwai's performance collaboration with Ryuichi Sakamoto, Music Plays Images x Images Play Music. Composition on the Table (1998/99) comprises four white tables bearing physical interface components: switches, dials, and turntables. Computer graphics images are projected onto the tables from ceiling-mounted video projectors, and loudspeakers are present. As the audience manipulates the interface elements, graphical and audio changes take place in a way that is intimately connected to the audience's input. The objective of this work was to create a mixed reality environment where multiple participants could create visuals and music together. Elements of this work are recognizable in Iwai's Nintendo DS videogame Electroplankton. The piece was presented as part of the Art Gallery at SIGGRAPH'99, Los Angeles. From 1996 to 1998 Iwai was the first Artist in Residence at IAMAS in Ōgaki, Japan. In 1997 he had a major retrospective exhibition at the NTT InterCommunication Center in Tokyo. From