In Signal.Flow, two acrylic tubes are bolted vertically to the ground outside the entrance of South Hall. Inside each tube is an array of motor-powered rotating red LEDs, a radio receiver, and speakers. The tube lights “play” the audio waveforms of the radio signals being received, which are controlled by IR-sensors. As people approach the tubes, they switch more and less frequently between radio stations, creating, essentially, a new station of fragments of the total on air programming in San Jose. As they spin, the LEDs create new visual patterns from the audio waveforms being displayed. The soundscape environment is unique to San Jose in terms of both radio and pedestrian traffic. It is also intended as a performance device, which people can “play” by their proximity to the devices.