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Mu-Tron | Jerry Garcia’s Mu-Tron Bi-Phase pedal

Property of Steve Parish

Mu-Tron | Jerry Garcia’s Mu-Tron Bi-Phase pedal

Mu-Tron | Jerry Garcia’s Mu-Tron Bi-Phase pedal

Property of Steve Parish


Mu-Tron 

Bi-Phase pedal, ca. 1970s


Effects board (4 x 13.75 x 10.25’’) with panels 2 phasor panels, 2 sweep generator panels, A and B inputs. [With]: Foot pedal (1.5 x 5 x 3.5’’) with 2 switches.


One of the rarest and most unique of 70’s effects pedals


“The Mu-Tron Bi-Phase consists of two independent 6-stage phasor circuits, two sweep generators (oscillators), and a number of unique additional controls to allow maximum flexibility in generating a variety of phasing effects. The Mu-Tron Bi-Phase also offers several convenience features including LED indicators on each phasor, mike stand socket on bottom of housing for above-the-floor mounting, and AC cord storage on back panel. The unit is furnished with a dual foot switch and has an optical photoelectric foot pedal and provision for synthesizer interface for external control of sweep. And, like all Mu-Tron products, the Mu-Tron Bi-Phase and its accessories are solidly constructed to withstand the most severe professional use” (from an original Bi-Phase advertisement, ca. 1970s).


Throughout the 1970s, Mu-Tron products were of the highest quality and innovative in their designs. Jerry had them in his racks and they became a part of his signature sound on songs such as “Fire on the Mountain” and “Estimated Profit.” The Bi-Phase was also of great use in the recording studio for a “Dub” effect on drums.


“Big” Steve Parish: “Jerry loved his Mu-Tron  pedals. We bought this one together and he tried it in a couple of shows with the JGB in the early ‘70s. He eventually replaced it with the Mu-Tron Octave Divider.”

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