joranalogue FOLD 6 User Manual
FOLD 6
WAVEFOLDER
MULTI-TOPOLOGY
INTRODUCTION
Often considered to be the opposite of filters within a modular system, wavefolders are designed to fold a signal over itself multiple times. This generates additional harmonics, resulting in rich timbres.
While there is a bewildering array of filter types
within the synthesiser world, most wavefolders
fall within only a few categories. Diode
wavefolders in particular come in just two
variants: series and parallel circuit topologies.
Choosing a specific folder also means being
limited to specific sounds and capabilities.
For the first time, Fold 6 puts forward a 6-stage
hybrid series/parallel topology, yielding a greater
sonic palette than ever in just 4 HP. Having both
main (series) and alternate (parallel) outputs
means a single module now gives access to just
about all wavefolding tones imaginable.
CONTENTS
In the Fold 6 box, you’ll find:
Product card, stating serial number and
production batch.
16-to-10-pin Eurorack power cable.
Mounting hardware: two black M3 x 6 mm
hex screws, two black nylon washers and a
hex key.
The Fold 6 module itself, in a protective
cotton bag.
If any of these items are missing, please contact
your dealer or support@joranalogue.com.
To take things even further, an integrated
symmetrical soft clipper limits the output signals
to approximately 10 V
within typical Eurorack levels and making it
easier to create overdriven sounds at high fold
ratios. This clipping stage can be driven
continuously using the shape parameter,
smoothly transforming the folded waveforms
into pulse waves for even more harmonic
content.
Two signal inputs are included, to mix audio
signals or add in a DC voltage for asymmetric
folding. The symmetry can also be manually
controlled using the dedicated knob. Of course,
both fold and shape parameters feature voltage
control, to enable continuous timbral
modulation.
Moving beyond simple signal processing, Fold 6
also lends itself perfectly for feedback patching,
CV folding or frequency multiplication; its
modest size belies the sonic capabilities within.
, keeping the amplitude
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FOLD 6
WAVEFOLDER
CONTROLS & CONNECTIONS
1 FOLD KNOB
The 6-stage wavefolder is preceded by a linear
voltage controlled amplifier (VCA), controlled by
the fold parameter. As the signal amplitude
going into the wavefolder increases, more fold
stages are engaged, resulting in more folds and
thus more harmonics being generated. At the
minimum setting, the input is fully attenuated.
2 SHAPE KNOB
The wavefolding section feeds into an overdrive
circuit. At the minimum setting of the shape
parameter, it is essentially disabled and classic
wavefolder tones are the result. As the circuit is
driven harder, folded continuous waveforms
such as sine and triangle waves are gradually
shaped into pulses, creating a harsher sound.
MULTI-TOPOLOGY
3 SYMMETRY KNOB
The symmetry knob adds a manually variable DC
offset to the signal inputs, ranging from −5 V to
+5 V. This can be used to achieve asymmetric
wavefolding, with either the positive or negative
part of the waveform being folded more than the
other, by turning it away from the centre
position. This knob can also be used re-centre the
wavefolder if there already is a DC offset present
in the input signal(s).
4 SIGNAL INPUTS
Connect the signal(s) to be folded here. These
identical inputs are mixed together, which can
simplify certain patches as it often removes the
need for a separate mixer module. As the entire
signal path is DC-coupled, control voltages (CVs)
as well as audio signals can be processed. These
two signal types can even be combined, for
variable symmetry audio wavefolding.
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