Tesseract is a live audiovisual work designed to provoke a questioning of the mechanisms of perception. The work creates interactions between two dimensional and three-dimensional visualisations of sound using lasers and video projections. This sound voltage is derived from a modular synthesiser that is kinaesthetically controlled by the performer using a theremin controller. The work is developed in reference to the tesseract, a four-dimensional hypercube beyond our ability to properly visualise, analogous to what a three-dimensional cube is to a two-dimensional square. It is inspired by a notion of the movement of electrons, as quantum waves, in relation to the movement of the underlying voltage that defines sound synthesis. The work considers the microcosm of the subatomic in relation to the macrocosm of experience.