AJH Synth founder Allan “J” Hall was designing effects devices at 12 years of age. He worked as a service technician for five years, learning how to repair and modify Arp, Korg, Moog, Roland, and other vintage synthesizers. Over the past decade, Hall has mobilized this experience to inform his line of eurorack modules, which includes things like the the MiniMod Contour Generators
, itself a clone of the envelope generators found on the Minimoog, and the MiniMod Transistor Core VCO
, a replication of the R A Moog Model D oscillator.