UNIQUE & ROBUST
MADE IN HULL, QUÉBEC
FAIRFIELDCIRCUITRY.COM
CONTROLS
RATE
The RATE control adjusts the time
intervals at which the random pitch
fluctuations occur. From rare to
nervous, the range is quite wide. At
high RATE and DAMP settings, the
quick variations have trouble pass-
ing through the swampy filter and
integrator, effectively reducing per-
ceived modulation. This is normal. The
interaction between these two knobs
is particular and needs to be tamed
through experimentation.
DAMP
The DAMP control affects the slope of
the modulating signal. At its minimum,
the pitch modulations are quick and
sudden; the random changes in modu-
lation voltage are almost instantane-
ous. Increasing DAMP will elongate
and soften the modulation. At high
DAMP settings, the changes become so
slow that they are not heard as pitch
modulations. To hear the changes,
some dry mix needs to be applied.
Then, the slow movement of the delay
time can be heard as chorus.
DEPTH
The DEPTH knob adjusts the intensity
of the modulation. The interaction
between all three modulation controls
is noticeable. The range of modulation
is focused towards subtle variations.
Adjust to taste, though less is more.
MORE CONTROL INSIDE
BOOST AND PAD
There are 2 jumpers at the input stage to match
your input signal’s level and impedance. By
default, BOOST is on, PAD is off; a typical set-
ting for high impedance, low output signals like a
guitar’s single coil pickups. If the user finds there
is too much distortion at the input stage, moving
the BOOST jumper to its off position will reduce
overall gain by 6 dB. If the signal source is line-
level, the PAD can be set to its on position, giving
another 6 dB of gain reduction while also reducing
the input impedance by a factor of 10.
LPG ADJUST
The recovery filter’s lowest frequency can be ad
-
justed, to fine tune the way it will react to incom
-
ing signals. Lowering this frequency emphasises
the action of the low pass filter, effectively raising
the threshold of sensitivity. Adjustment should be
made with the following settings: MIX full wet,
LPG minimum, DEPTH minimum. While listening to
a signal going through the pedal, you’ll hear the
effect of the recovery filter at its resting state.
Carefully turn the trimpot labelled LPG adjust,
clockwise to raise the filter’s frequency, counter-
clockwise to lower. Be very careful, adjustments
should be minimal as the trimpot is very sensitive.
After each adjustment, LPG should be turned up
momentarily to listen at the envelope’s response
to the incoming signal.
LPG
The LPG control adjusts the level of the envelope go-
ing to the low pass filter and gate circuit. At lower
levels the signal will be darker, choke subtle notes
and reduce sustain. At higher settings, the sound will
be brighter, have more sustain and might reveal some
noise produced by the bucket brigade device.
MIX
The MIX control balances between the dry and wet
signal. When it’s full wet (clockwise) the effect is like
a vibrato. Chorus-type sounds are achieved by adding
some of the dry signal (counter clockwise).
VOLUME
The VOLUME knob controls the output volume. Unity is
around
noon and beers around 5 at my place.
F A I R F I E L D C I R C U I T R Y
K F M 0 0 0
V O L U M E
M I X
D A M P
R A T E
D E P T H
L P G
plenty of output volume
rate of
change
modulation
slope
modulation
depth
dry/wet mix
envelope amount
output
input
9 VDC
