The Befaco Chopping Kinky is an analogue Eurorack wavefolder with two voltage-controllable channels and a chop output that switches between them. It is for modular users who want to add harmonics to simple waveforms or reshape control signals such as LFOs and envelopes.
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Two folding channels: each with its own wave folding profile, so A and B have different characters
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Voltage-controlled folding: per channel, one CV input through an attenuverter plus a second CV input direct to the channel's internal VCA
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Chop output: an internal analogue switch selects between channel A and channel B
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Zero-crossing or gate switching: the chop follows channel A's polarity on its own, or an external gate at CHOPP IN
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DC-coupled inputs: processes audio and CV alike
A wavefolder raises the level of a signal until it would saturate, then folds the waveform back on itself instead of clipping it. Unlike a filter, this adds harmonics rather than removing them, and turning up the fold amount or modulating it gives moving, increasingly complex timbres from a basic sine or triangle.
The chop section sends channel A to CHOPP OUT while a gate is present, or while channel A's signal is above zero, and channel B the rest of the time. With no gate patched, the zero-crossing detector makes the choice automatically, which combines the two folded signals into a single new waveform. Patching a clock or rhythmic gate instead turns the output into a switch between the two channels. Both channels also have their own outputs, so A and B can be used separately alongside the chopped result.