Beat extractor, distortion box, and visualizer. Uses a CD4049 inverter responsive to audio input, creating a pulse wave counted by a CD4040 binary divider. Rotary switches allow selection of divider outputs. Output from the CD4040 also reaches a CD4046 phase-locked loop that attempts to track the pitch of the signal. Three external modulation outputs. Excellent for gating/crushing drum and bass lines, and for visualization of audio signals.