1
OpticShifter is a 20-Stage Phaser with flexible feedback and pole selection. Drawing inspiration from
classic 70's era phase shifters, it combines vintage charm with modern versatility. Whether you're
aiming for subtle movement or dramatic swooshing and whooshing, from phasing to vibing, OpticShift-
er creates an immersive Phase Shifting experience.
OpticShifter's core consists of nothin less than 20 All-Pass Filter stages in series, featuring two
independent switches: one to select the number of stages (4, 6, 8, 12, 16, 18, or 20) and another to
choose the specific pole from which the Feedback (Resonance) originates. Additionally, it includes a
Feedback knob and a voltage-controlled feedback CV input. You can also set the feedback polarity and
select the feedback magnitude with dedicated switches.
There is a dry/wet knob and a pre-phaser tilt EQ knob to control the overall tone, allowing you to blend
the effect with the original signal and shape the tonal characteristics before phasing. The module also
features an input level knob with a clipping LED monitor to ensure optimal signal levels and prevent
distortion. An internal triangular voltage-controlled LFO is available to control the phase offset, which
can be bypassed to allow control via an external source. The phase CV input features a hyper triangle
shaper, ensuring the phase offset control, including that from the internal LFO, is shaped to a hyper
triangle.
OpticShifter has a main output that corresponds to the number of stages selected, providing the
primary phasing effect. Additionally, there is an output for the feedback stage chosen. This setup can
be used to create pseudo stereo effects, with the main output acting as the left channel (L) and the
feedback output serving as the right channel (R), allowing for a wider, more immersive stereo field.
OpticShifter also includes two additional outputs. The Wet output provides only the wet (effected)
signal. The Shred output delivers a heavily distorted version of the wet signal, based on an opamp
comparator design, offering an aggressive texture to your sound.
OpticShifter also features a ping input, allowing you to excite the all-pass filters with any clock signal
(LFO, Triggers, etc.) to trigger the filter’s natural resonance. The result is a percussive or bell-like sound
determined by the filter's settings, such as the cutoff frequency and feedback.
Overview
Phase
Feedback
FdBk (R)
Wet
Ping
Phase
In
Level
LFO
OpticShifter
Dry/Wet
Feedback
LFO Rate
Shred
Out (L)
Tone
LFO Rate
4
8
12
16
18
20
4
8
12
16
18
20
Feedback
Stage
