Waveshaper, Distortion Modules

• Classic diode design that adds odd harmonics by folding the incoming signal, generating up to 4 square waves spaced one octave apart
• Width: 12 HP
• Depth: 42 mm
• Power requirement: +60 mA (+12 V) / -55 mA (-12 V)

• Analogue wavefolder
• Contains serial and parallel wavefolder circuits with 6 steps each
• Controls for fold, shape and symmetry
• Connections: two signal inputs, CV inputs for fold and shape, signal outputs for serial wavefolder (main) and parallel wavefolder (alternative)
• Current consumption: 40 mA (+12 V) / 40 mA (-12 V)
• Width: 4 HP
• Depth: 35 mm

• Dual wavefolder with crossfader
• Has 2 channels with "Buchla-style" and "Serge-style" wavefolders, each with CV input and attenuator
• Crossfader with CV input and attenuator
• Can also be used as ring modulator or noise generator
• Internal feedback routing and aux input for external modulation
• Individual outputs per wavefolder and mix output
• Current consumption: 94 mA (+12 V) / 94 mA (-12 V);
• Width: 8 HP
• Depth: 38 mm

A-137-1 is a voltage controlled waveform multiplier. The basic idea of a wave multiplier is to multiply the waveform of an incoming audio signal (e.g. triangle/sinus/sawtooth of a VCO) within one period. This creates additional harmonics in the audio signal. The period duration and thus also the pitch of the signal remain unchanged - in contrast to frequency multiplication such as with the PLL module A-196.

The A-137-1 works as an "inverse low-pass filter", i.e. it adds additional harmonics to a signal poor in overtones, whereas a low-pass filter (e.g. A-120) filters out overtones from a signal rich in overtones. Therefore, the A-137 gives the best results in combination with comparatively low harmonic waveforms (e.g. triangle, sine) as input signal. For overtone-rich input signals (e.g. sawtooth) the A-137 can also be used, but the effect is not as spectacular as with a triangle signal. With square-wave signals, the effect of the A-137 is hardly noticeable.

The Multiples parameter (adjustable manually and by control voltage) defines the number of waveform multiplications within a period. The two parameters Folding Level and Symmetry (both adjustable manually and by control voltage) set the upper and lower level at which the convolution of the signal takes place. The function of these two parameters is shown graphically in the diagram below. The Harmonics parameter (adjustable manually and by control voltage) adds further harmonics (i.e. in addition to the harmonics created by waveform multiplication) by sharpening the waveform edges (amplification and limiting) and adding overshoot peaks (attenuated waves at the edges).

• Input Level to adjust different input levels for the optimal effect of the module
• Multiples: Number of curve multiplications, manual setting
• Harmonics: Adding additional harmonics by an effect similar to the resonance of filters, manual adjustment
• Folding Level: Value of the upper and lower folding level, for explanation see sketch below, manual setting
• Symmetry: Symmetry of upper and lower convolution level, see sketch below for explanation, manual adjustment
• Width: 14 TE / HP
• Depth: 65 mm
• Current consumption: +40 mA (+12 V) / -20 mA (-12 V)

Inputs/outputs:

• Audio In - also suitable for control voltages
• Multiples CV In: Control voltage input for the number of curve multiplications, with attenuator
• Harmonics CV In: Control voltage input for the Harmonics parameter, with attenuator
• Folding Level CV In: Control voltage input for the convolution level, with attenuator
• Symmetry CV In: Control voltage input for convolutional symmetry, with attenuator
• Audio Out: Output for the processed audio or control signal.

• Distortion Module with Plasma Technology by Gamechanger Audio
• Input Level, Wet / Dry Mix, Voltage and Voltage CV controls
• Treble / bass equalizer
• EQ bypass switch
• Additional overtones via octave up / down switch
• CV Inputs for Voltage and Wet / Dry Mix (3.5 mm)
• Octave and sub-trigger inputs (3.5mm)
• Current consumption: 135 mA (+12 V) / 87 mA (-12 V)
• Width: 16 HP

• Waveshaper and distortion in one module
• Both units can be used separately or connected in series
• CV inputs for shape and distortion intensity
• Hard and soft clipping selectable
• Audio input & output for shaper and distortion
• Shaper output is normalized to distortion input
• Current consumption: 75 mA (+12 V) / 45 mA (-12 V)
• Width: 10 TE
• Depth: 26 mm

• Combined overdrive and wavefolder
• Controls for drive and gain
• Gain CV input with attenuator
• Drive CV input
• Limiter for signal output
• Current consumption: 29 mA (+12 V) / 29 mA (-12 V)
• Width: 3 HP
• Depth: 35 mm

• 2 Identical overdrive circuits in one module
• Gain and Drive controls
• Gain and Drive are CV controllable
• Three different overdrive tones selectable
• Power requirement: 58 mA (+12 V) / 58 mA (-12 V)
• Width: 10 TE
• Depth: 50 mm

• Voltage controlled signal shaper and waveshaper
• Suitable for CV and audio signals
• Works as limiter, distortion, clipper, waveshaper, frequency multiplier, inverter, can change voltage shapes of envelopes and LFOs and more
• The input signal is influenced manually at 5 defined points via rotary knob or CV input
• Signal input with gain control and switch between unipolar and bipolar
• Unipolar and bipolar output
• Current consumption: 6 mA (+12 V) / 7 mA (-12 V) / 32 mA (+5 V)
• Width: 6 HP
• Depth: 21 mm

The A-136 is a distortion and wavehaping module with extensive adjustment parameters. The input signal (audio- or control voltage), is first divided inside the module into 3 separate signal paths, which are mixed together at the output with adjustable gain (positive / negative):

By way of all the various possible settings of the 5 parameters, very complex waveform distortions and modifications (waveshaping) are possible. The changes range from simple hard- or soft-clipping, to completely changed waveforms, in which the original input signal can no longer be recognised.

• Positive component of the signal with adjustable clipping threshold (also externally); and gain / roll-off (+/-)
• Negative component of the signal with adjustable clipping threshold (also externally); and gain / roll-off (+/-)
• Original signal with adjustable gain / roll-off (+/-)
• Inputs: Audio / CV In, ext. Clipping Level (+), ext. Clipping Level (-)
• Outputs: Audio / CV Out
• Application examples: Audio distortion (can get especially interesting in conjunction with filters), waveform manipulation for audio- and control signals (LFO, ADSR, random, etc.).
• Width: 8 HP
• Depth: 45 mm
• Power requirement: +30 mA (+12V) / -10mA (-12V)

• Voltage controllable dual wave-folder
• Two independent channels with adjustable wave-folding intensity
• 2 CV inputs per channel (1x with bipolar attenuator)
• Chop output can switch between both output signals without crackling
• Current consumption: 65 mA (+12 V) / 55 mA (-12 V)
• Width: 8 TE
• Depth: 30 mm

The A-116 module provides voltage-controlled, dynamic waveform modification of audio signals. It can produce new waveforms from the standard, basic forms; with such changes also having the option of being modulated.

The signal first of all goes through an input amplifier with a gain range from 0 up to 2, i.e. the signal can be both attenuated and amplified up to a factor of 2. After the input amplifier, the signal goes through two parallel processors.

Signal processing paths: clipping and an asymmetrical amplifier. Subsequently, the modified signals are then added and fed to the output. The parameters of the clipping level and symmetry can be set manually as well as modulated by control voltages, which allows for very complex and dynamic waveform changes.

• Width: 8 HP / 40.3 mm
• Depth: 40 mm (measured from the rear side of the front panel)
• Power requirement: +20 mA (+ 12V) / -20 mA (-12V)

• Sidechain Distortion
• New signal path consisting of VCA, rectifier, phase modulator, ring modulator, dual-band distortion and clipper stage
• Controls for the drive, phase, harmonics, feedback, low, high, blend, feedback and drive
• CV inputs for the drive, inject, feedback, phase and harmonics
• Audio input and output
• Current consumption: 56 mA (+12 V) / 45 mA (-12 V)
• Width: 10 TE
• Depth: 25 mm

• Germanium Fuzz Module
• Controls for input level, output level (with high pass filter) and feedback
• Gain CV input with attenuator
• Current consumption: 10 mA (+12 V) / 10 mA (-12 V)
• Width: 8 HP
• Depth: 35 mm

• 2 Channels with up to 25 dB gain
• Also suitable for amplifying guitars, basses or microphones to Eurorack level
• 3-Position colour switch per channel for tonal variation
• Power consumption: 26 mA (+12 V) / 26 mA (-12 V)
• Width: 14 HP
• Depth: 35 mm
• Intellijel 1 U format