“It became an overnight sensation when Stevie Wonder used the effect”: Loved by Frank Zappa, Bootsy Collins, Steve Vai and more, how the Mu-Tron III became a vintage pedalboard icon

Long exposure of a musician adjusting dials on a pair of Musitronics Mu-Tron III effects pedals and Moogerfooger analog effects modules, taken on October 30, 2013.

Where demand for pedal effects grew exponentially during the early ’70s as musicians sought new sounds, many stompbox designers turned to the synthesizer for new inspiration.

Mike Beigel was among the earliest engineers who realized that synth modules could easily be adapted into standalone effects. Although Guild hired Beigel to develop a synthesizer in the early ’70s, the project got canned, which inspired Beigel and former Guild chief electronics engineer Aaron Newman to form their own effects company, Musitronics, in 1972.