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. DOWN 1: Controls the volume level of the 1-octave-down signal. Both this and the 2 Down control have been tuned to provide the best possible tracking across all positions on the fretboard. FILTER 1: This control governs the cutoff point for a second-order low-pass filter on the 1 Down knob. At minimum, the cutoff point is ~7KHz, retaining all the harmonic richness and video game-esque qualities. At maximum, the cutoff point is ~280Hz, giving you a clean octave down with bubbling harmonics lying underneath. DRY: This knob controls the volume of the dry signal. It is not your true clean guitar signal, but rather a boosted version of it, allowing it to mix better with the octaves. There’s plenty of volume on tap and it sounds great just by itself. DOWN 2: Just like Down 1, Down 2 controls the level of the 2-octave-down signal. FILTER 2: This control governs the cutoff point for a deeper second-order low-pass filter on the Down 2 knob. At minimum, the cutoff point is ~7KHz, just like “1 Filter.” However, at maximum, the cutoff point is ~140Hz to really let the “oomph” shine through at higher settings.
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