Sarlacc, an audio-visual performance, features visuals live coded within the OpenGL fragment shader, that are reactive to incoming audio frequencies parsed by band, beats per minute, and Open Sound Control data. The sound component is performed using Ableton Live and analog synthesis. Author Keywords OpenGL; shaders; live coding; performance; audio-visual; Open Sound Control ACM Classification Keywords J.5. Arts and Humanities: Arts, Performing arts. D.2.6. Programming Environments: Interactive environments. I.3.6. Computer Graphics: Methodology and Techniques: Interaction techniques.