dueling axes: two-center bipolar version

I wrote some code in Processing so that I can participate in a future Dueling Axes event with BEAMS, an event in which audio performers generate visuals by using their two channels of input to independently control the x and y coordinate of a point, oscilloscope-like. I decided to try other coordinate systems. This video is my two-center bipolar proof-of-concept. Here, the audio channels are just a guitar and a slightly delayed version of it.