Freak In don’t Freak Out!

fricko unique eurorack modules for DIY
(many especially suited for wind controllers)
pcb+panel+schematic: US $32.00
pcb+schematic: US $23.50
April special: free tracked post for orders over US $90

Customer Showcase

Engineer Jeff Hopkins built fricko Splice, Shell and Blip! modules.
He explains his rig, and his fabulous custom wind controller, a long-term project.
Innovator Mark Steiner wants to make real analog modular sounds available polyphonically.
Check out his NuRad wind controller! (…and the fricko Shell and Blip! modules)
Musician Daniel Riera built a fricko Blip! and shows how it fits in with his need for more organic sounds with his EWI.


2Q 2021

  • Special for April: orders over $US 90 get free postage: 4 sets actually cheaper than 3 sets!

1Q 2021

  • Duck and Tame quad passive optical ducker (side chain limiter) and limiter (self-limiter) released! Detailed section on making the special DIY Vactrols now added
  • Splice Combiner: alternative component values for bass/baritone
  • Price drop! Australian dollar too strong: standard price is dropping from AU$45 to AU$42 = US$32

4Q 2020

fricko MODULES

Yes we are open for business in 2021!

  • Waveshape Manipulation
    • Blip! — constant-breadth pulses like electic guitars, oboes, brass, comb filters (similar to Variophon)
    • Shell — waves with 4 or 6 zero-crossings allow dark (but not dull) and rich tones like cello, viola and tenor sax (from Fibonacci sequence)
    • ProPulse — modulates pulse and phase at same time, revolutionizes additive synthesis (from ARP ProSoloist)
    • Rasp — like a wave multiplier but for sawteeth not sine, for bright and sparse sounds
  • Envelope CV Manipulation
    • Blat — allow more assertive dynamics on wind controllers
    • Clean — allow cleaner separation of portato notes from your ADSR – less slushy lines with more singing character.
    • Velocitizer — Adding velocity to your envelopes is now SOOOOOO cheap and easy [Purchase from Elby Designs]
  • Combiners
    • Splice — Combine highs from A with the lows from B: 36db/8ve phase-coherent fixed filter combo
    • Prism — Alternative combiner based on MinMaxMix diode mixing
      • Status: Revised test unit built pending evaluation
  • Spectrum Manipulation
    • Vox H. — Vox Humana resonator with adjustable formants (from PolyMoog Keyboard)
    • Sharpen — Resonators from ARP ProSoloist
      • Status: Test unit built pending evaluation
    • Tilt — Triple noise generators with Quad-style “tilt” equalization
      • Status: Test unit built pending evaluation
  • Passive Level Manipulation
    • Duck — Dual passive opto sidechain limiter (ducker): NEW!
    • Tame — Quad passive optical limiter for waves: NEW!
      • Recommended as companion for Shell module.
    • Pads — Signal too hot?
      • Preset level and range without knockable panel controls
    • Fix — MIDI CVs too hot?
      • Preset level and range without knockable panel controls.
  • Non-Products
    These are boards I do intend to sell as products. However, please contact me if you are interested. I am happy to share the Kicad design files, and I may have some spares available at cost.
    • Low Dropout Regulator Board
    • Front Panel for Octex MIDI to CV board
      • Translucent! Don’t waste all the Octex blinkenlights.
    • Version of MyRefC ChipAmp PCB
  • Public Domain/Open Source
    Many of the fricko products have public domain schematics of initial versions available at However, the mature product schematics are ony available to customers/owners/builders.

Blip! Waveshaper  Shell Waveshaper  Clean Envelope Generator  Rasp Waveshaper

One Price: USD $32.00

AUD $42   GBP £23.00 Euro €27.00
(add tracked postage)

Free Tracked Postage on orders over US$90 (€76) till end of April

No-Panel Deals: PCBs only US$23.50 each. Free tracked postage on orders over $90. Or order one or two PCBs and we can send by regular untracked mail (North America, EU, UK, only).

How to order? See Pricing and Purchasing.
Where to order? See Contact.

What you will get: 1 x PCB (unpopulated), 1x panel (PCB material), schematics. See each product page for explanatory info and BOM.


A message from the designer: Looking Backwards is not the only Possibility!

  • Unique functions inspired by advances in the physics and measurement of musical sounds, not available elsewere: insights used by digital synthesis now applied to analogue!
  • New ideas, new designs, new takes, new patches, new sounds! See below for links to the product pages, engineering and build information.
  • Friendly on rack space: 4HP and/or 6 HP panels and 30 to 70 mm deep!
  • Convenient for DIYers: assemble in a single evening, through-hole, reasonable space between components, test points, no expensive or rare parts, all analogue.

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