Jarmaggeddon is a battery powered synth in a jar with only one parameter: glitch. Not really sure how it works. It hosts a lump of code written that purposefully creates unpredictable and disgusting results! The onboard unipolar (0-5v) cv input allows you to modulate the glitch amount. If you're a noob to DIY you'll love this puppy - it's hella easy to assemble.