SpinStack is an interactive musical instrument that requires audience participation. Moveable, spinning, sculptural forms serve as projection surfaces for ever-changing, waveform images. The sole digital interface of SpinStack, the projections bounce and deform, providing feedback in conjunction with a techno-inspired soundtrack. Mike Richison is a professor in the Department of Art and Design at Monmouth University where he teaches motion graphics. He is a multimedia artist who utilizes a variety of media and approaches including graphic design, interactive video, and sculpture.