Critter and Guitari’s Color Television Oscilloscope is a $99 device that turns your audio input into psychedelic video output:

This video device has an audio input and video output. It behaves like a traditional oscilloscope, with a control to change the display mode and colors. The sweep rate is fixed at the NTSC frame rate, about 30 Hz.

One knob controls the input gain, and the other controls the display. There are 2 modes: line mode, and color shifter mode. The first half of the knob rotation is color shifter mode, and the second half is line mode. Line mode is simply a line with adjustable width and color. Color shifter mode is made up of bars that change color. The rate of change is adjustable.

Video Scope mounted to painted panel with 2 knobs, RCA audio input, video output (NTSC only), 9v power input (adapter included)

Here’s some video of the Color Television Oscilloscope in action:

These look like they could be a great effect, run off different channels of audio.

If you’ve used Critter and Guitari’s Color Television Oscilloscope, leave a comment with your thoughts!