At the core of The Listening Machine is a piece of software that monitors the Twitter activity of 500 people around the UK, selected proportionally from eight different fields: arts, business, education, health, politics, science, sport and technology. A further part of the group is selected completely at random. When any of these people posts a status update, the machine analyses its properties in terms of both sound and meaning, and generates music based upon it. (via The Listening Machine)