Fewer things give guitarists that fabled “riff face” more than a fuzz mixed with an analog octave down, and our original Perseus was a trailblazer in that regard. With that said, the Perseus Dio is a rightful successor to that box. The Perseus Dio greatly expands on the concept of our original device, giving you a three-voice all-analog octave down device with adjustable octave filters. Three knobs control the mixer section, giving you one octave down, two octaves down, and a dry, boosted distortion. The Dry knob gives you a really great light distortion sound that’s more than capable of pushing your amp into overdrive, but the fun starts when you control the levels of octave down signals with their accompanying low-pass filters. With no filtering, the octaves are harmonically rich square waves that sound like old-school Nintendo, but turning up their accompanying filter knobs smooth out the harmonics and turn into clean octaves down. Let’s get pixelated.