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The Protostar is the evolution of the Super FatMan envelope filter with even more pro level features. Ā Built in LFO, 4 filter modes, full CV patch bay, and expression/CB input, this is the most powerful/versatile envelope filter on the planet. Ā Also includes an end of chain compressor and dry wet mix for parallel filtering/compression effects!


AttackĀ - How fast the envelope will react
to the incoming signal. Controls both
attack and release.

ThresholdĀ - How sensitive the envelope is to the
incoming signal.

Env AmtĀ - Attenuverter that controls how much
the envelope will affect the frequency of
the filter, either negatively or positively.

ResonanceĀ - Synonomous with feedback or Q,
this is a boost of the frequencies around the
frequency cutoff.

FreqĀ - Also known as cutoff, this knobā€™s
position dictates the resting place of the
frequency cutoff.

LFO RateĀ - Make the LFO go faster or slower
with this knob.

LFO AmtĀ - How much the LFO will affect the
frequency cutoff.

CompressionĀ - End of chain compressor squashes
the wet signal to suppress unwanted honks, and
resonant oddities.

Dry / WetĀ - Amount of unaffected vs. affected signal
coming through the output.

SidechainĀ - Direct input to the envelope follower.
Normalled to the input, use this to have the
envelope follow an external source.

Exp OutĀ - Output for the expression pedal
input. Exp isnā€™t connected to any control
internally and must be patched.

- Env OutĀ - Always sending +5V until the
envelope is triggered, bringing the voltage
down to 0V and back.

+ Env OutĀ - Sends a CV signal following the
envelope. Signal is 0V to +5V.

LFO OutĀ - Constantly sends the triangle
wave LFO CV signal, reacts to LFO rate knob.

LFO RateĀ - CV input for control over LFO rate.
Sensitivity adjustable with internal trim pot.

LFO AmtĀ - CV input for control over LFO amt.

FreqĀ - CV Input for control over cutoff frequency.

FeedbackĀ - CV input for control over resonance.

Expression InputĀ (back panel) - Plug a TRS
cable from any expression pedal into this, patch
the exp out to what you want to contol, and
express yourself.

Other Info:

9VDC, Boss Style Center Negative, 400mA. 1A supply reccomended.Ā Do notĀ exceed 9V.

1A supply recommended.
Internal Bipolar 12V power supply.

0-5V nominal CV range. All inputs/outputs protected.

LFO CV sensitivity and Compressor Gain adjustable

Relay true Bypass.
4.9" x 3.9" x 2.4" maximum dimensions.

Expression Pedal: 10k - 1M pot. TRS connection.

Patch Points - Mono or Stereo cable. Signals are mono.

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