Zvex Vertical Vibrophase Guitar Effects Pedal

A few years ago ZVEX Effects released the Candela Vibrophase™, a candle-powered vibrato/phaser machined from solid brass and glass that used a mix of 1800s technology (a Sterling heat engine) and 60s/70s audio circuitry to create a lovely swirling effect. They received numerous requests to put that sound into a guitar pedal and after a bunch of research, Zvex came up with a way of dramatically broadening the spectrum of textures available using the original circuitry from the Candela. It's presented to you here as the Vibrophase™, a five-knob four-stage phaser that creates phase and vibrato nuances never heard before. Five knobs! Count 'em! Speed sweeps from maddeningly slow to puppy dog flippy, vibrato/phase sweeps from, erm, you'll figure that out, feedback sends the output back through the phaser again to raise intensity, and there are controls for the top end and bottom end of the sweep so you can completely tailor the sound to your song.

Features:

• Speed - This control feeds an input on a microcontroller that’s programmed to generate a sine wave output to drive an LED over a very wide range of frequencies. It can completely crawl or zip off like a hummingbird. 
• Vibrato/Phase - This control adjusts the mix from Vibrato (counter-clockwise) to Phase (clockwise). Phasing occurs when the Vibrato signal coming from the sweeping phase shift networks is blended with some original dry guitar. 
• Feedback - This control takes the output signal and leaks some of it back into the input of the four-phase shifters. 
• High Bias - This control interacts with the Low Limit control so if you set it and then adjust the Low Limit you may have to come back and set it again. 
• Low Limit - This control interacts with High Bias so if you set it and then adjust the High Bias you may have to come back and set it again.