Turns out that the guy who designed this pedal is the amp repair guy at Dave's in LaCrosse so I got to spend some time with him and his pedals (the Chaos and a not yet released overdrive that was cool but I can't say anything about). The Chaos is a 3 knob, two switch distortion/fuzz pedal. There're traditional volume and drive knobs. The third knob controls the amount of "effect" circuit. There's also a voicing switch that emphasizes even or odd order harmonics and a "hair" switch that increases distortion. So far it sounds like a standard distortion with a few extra switches.... Imagine a Fuzz Factory without the gating or self-oscillation/squealing! This starts with a fairly standard overdrive that cleans up when you back off on the guitar volume. As you add the effect it starts to create "intermodulation distortion" whatever that means. What it sounds like is that you're using an envelope generator to drive a ring mod and low pass filter. When you hit a note hard, it'll have a lot of high frequency content, as it fades it seems to shift harmonic content to more mids. The harmonic content ramps up quickly as you add more strings, with chords increasing the number of apparent notes and the envelope/low pass filter effect. It's a great way to mangle notes without losing musical content or gating (so you don't lose the tails off notes). It apparently works great with keys and vocals as well-preserving the formants better than most fuzzes. Any downsides-well it does something that high gain amps do that bugs me-it takes just the tiniest bit of attack off notes-so they don't jump out of the guitar like they do with a NMV amp. Otherwise, no, I'd buy one of these in heartbeat if I wasn't saving my pennies for Arlington. To my ears the straight OD was even better-VERY musical and amp like. Combined with a Klon or SHO for boost, it might be all the pedal you'd ever need.