User manual
wren and cuff
EYE SEE PI Integrated Circuit Distortion
A meticulous recreation of the short-lived “op-amp” Mu from the late 70’s.
What’s dierent?
is pedal uses an IC or “Op-Amp” in order to create its distortion instead of the traditionally four transistors
usually used.
Unlike all other mus, there were two versions of this pedal, only slightly dierent that were released between 1977
to 1979 or ’80 depending on who you ask.
One of the big dierences between the two pedals was the inclusion of a
TONE BYPASS switch on the later version.
Since I’m a bigger fan of the earlier version without the tone bypass, I’ve
elected to recreate the rst-version, but add the tone-bypass switch
included on the second version… e best of both worlds IMO.
is pedal has a similar tone to the traditional mu, but the word
“similar” is very literal.
It’s much more distortion than fuzz, and reminds me more of the 80’s
and 90’s even though it was actually released in the 70’s.
Our version uses a BA4558 dual op-amp chip rather than the RC4558
chip used in the original because the BA4558 sounded closer to the
original to my ears, and at the end of the day, I’ll always go with tone
over part #.
I hope you’ll agree!
VOLUME: Makes it louder or not so loud when ya turn it.
TONE: Turn it right, things get bright, turn it left and… damn, can’t
nd a rhyme. Turn it left and it gets darker and thicker.
TONE BYPASS: Flip this switch and the tone section is completely
bypassed. this will disable the tone knob and provide a dierent sound.
SUSTAIN: A fancy way to say distortion or fuzz. Turn it up for more, and turn it down for less!
POWER: is pedal uses a 9V battery or a standard center-negative 2.1mm barrel regulated power supply (same
kind used for Boss, Ibanez, etc). If using a power supply, please use one intended for eects pedals.
CURRENT DRAW: e Eye See Pi will draw around 6mA
BYPASS: Eect on/o switching is done via a 100% mechanical 3PDT foot-switch, otherwise known as “true-
bypass”