Polyphemus I is a 6-pole IIR filter that gives knob and CV control of each pole-pair's angle and radius. It also includes some controls for managing filter stability and gain. It's somewhat unwieldy, as large swaths of the unit disc are not really useful for audio frequencies (especially if you use a higher engine sampling rate). The module provides some utilities for inspecting the filter's behavior: a filtered white-noise output for inspecting the frequency response, a filtered square wave for inspecting the step response, and X/Y outputs for plotting the poles on an oscillscope in X-Y mode.
