The Schumann PLL is an analog harmonizer effect pedal, normally used with an electric guitar. It creates two oscillating signals and allows a seemingly endless array of customizing options. It was designed and hand built by John Schumann. It sold new at Main Drag Music in Williamsburg, Brooklyn for $500 until 2005. It was available with an array of add-on effects, such as a Drone generator and a momentary "activation" footswitch. Though John no longer has ties to Main Drag Music, he now sells pedals through his web site. Bands currently using Schumann pedals include: *Enon *lumière des dieux
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