Triple WaveFolder (TWF) – Barcode/Toppobrillo Panel and PCB

From: £20.00

We now have this Black Eurorack Panel and Panel PCB from Barcode which turns the Toppobrillo Triple Wavefolder into a simple panel mounted build with no wiring!

Toppobrillo PCB is offered optionally AT HALF PRICE, but you must TICK to Add it unless you already have one!

Price does not include EU VAT

Toppobrillo TWF PCB - You must tick the ADD box below if you don't already own this! – optional

Out of stock


This set includes:

  • Barcode 14hp Black Eurorack Panel
  • Barcode Panel PCB (for pots jacks etc)
  • Toppobrillo TWF PCB

Two great video demos from Gary Stone, embedded with permission.

TWF Documentation – BOM, Wiring etc.

The PCB is 76mm by 107mm. It can run on both +/-15v or +/-12v (with some resistor changes noted in documentation).

The TWF module was designed with multi-use in mind… it is composed of three identical (with the exception of a couple features) direct-coupled waveshaping stages that can be used independently or in series, the operation is selected according to which inputs are used- See block diagram for routing..


The facility for independent control over each folding stage provides multiple processing options for a variety of sources as well as more interesting explorations with timbre modulations/ frequency synthesis >/./,./>?? than preconfigured waveprocessing profiles—-.

Each stage can fold” (GENTLY) an input source inward on itself as it approaches a threshold set by the panel controls and cv;� For example, a sawtooth or a triangle input from a VCO can be bent into a sinewave, and beyond that- doubled in frequency, at constant amplitude… USE THEM IN SERIES AND THEY FOLD AGAIN AND AGAIN AND…

some things you can do with it, under voltage control, simultaneously!:

create complex timbres from audio sources– Possibilities are really limitless. you can control each series of harmonics via the BIAS panel controls. So the overall sweep thru the folds when using the VCALL/ MANUAL controls is very flexible- and since each stage of the folding process is VC’able, you can use different modulation sources simultaneously for wild animation/ phasing/ beating with a single tonesource.

The normallized DC bias at input 1B can be used to control the symmetry of the folding process, via the control knob. (WHEN THE INPUT IS NOT IN USE).

CV PROCESSOR for LFOs, envelope generators, sequencers or any control source. create multiple interesting rhythmic modulation sources from an otherwise dull one(s). useful in creating more complex, continuously variable shapes for modulation or timing.

accurately multiply/ SQUARE UP an input SIGNAL, shape your TRIangles and sawtooths into very pure! sinewaves, mangle your sinewaves or anything else into very unpure assymetrical fuzz, generate a COSINE functon relative to your VCO’s TRI/SINE output (useful for quad panning, stereo modulation).. Do a couple of these things at the same time with different sources…

Euro SPECifications:

*module width is 15HP
*low profile; behind-panel depth of unit is less than 1 1/2″
*low current design; less than 10mA each rail max


TWF Documentation – BOM, Wiring etc.

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