Doepfer

The oscillator generates sine and cosine waveforms at the same time. These are terminated as soon as the linear control voltage reaches 0 V.

• 2 Control sections: Linear and exponential
• Controller for XTune, XFM, LFrq and LFM
• Width: 8HP / 40.3 mm
• Depth: 60 mm
• Power requirements: 90 mA

• Dual 3-way crossfader
• Contains 2 crossfaders, each with 3 inputs (A, B, C) and one output
• Available knobs per channel for crossfading between inputs A, B and C
• Suitable for audio and CV signals
• Current consumption: 10mA (+12V) / 10mA (-12V)
• Width: 4 TE
• Depth: 30 mm

• Can simultaneously produce sine and cosine signals
• 4 Outputs that are phase shifted by 90 degrees
• Eurorack format
• Width: 8 HP
• Depth: 50 mm
• Power requirement: +30 mA (+ 12V) / - 30 mA (-12V)

• Voltage Controlled Delayed Low Frequency Oscillator
• Module consists of Voltage Controlled Low Frequency Oscillator (LFO) and Voltage Controlled Amplifier (VCA)
• Switchable to polarizer / ring modulator and voltage-controlled linear delay envelope (with only one parameter: delay or attack) for delayed LFO use with voltage control
• Vintage Edition with black front panel
• Width: 8 HP
• Depth: 55mm mm
• Power requirement: +60mA mA (+12V) / -40mA (-12V)

• For connecting with the Doepfer ribbon controller
• Produces a control voltage for the pitch of the oscillators
• 2 Sub units: Position and pressure
• Width: 8 HP
• Depth: 40 mm
• Power requirement: +40 mA (+12V) / -20 mA (-12V)

Only module is included, controller not included and must be ordered separatley!

• New filter module in which so-called opto FETs are used to control the filter frequency
• Dimensions (W x D): 40.3 mm (8 HP) x 65 mm
• Power requirement: 40 mA

• Foot controller connector and dual foot switch connector to provide analogue control voltages (foot controller) and two gate / trigger signals (footswitches) to control other A-100 modules
• Width: 4 HP
• Depth: 30 mm
• Current consumption: +10mA (+12V) / -10mA (-12V)

• Complex envelope generator
• Consists internally of four Attack/Decay generators
• Euro rack format
• Width: 28 HP
• Depth: 50 mm
• Power requirements: +70 MA (+ 12V) / -40 mA (-12V)

• 168 HP / 9 U
• 100 - 240 V
• 2 Built-in A-100PSU3: +12 V / 4000 mA, -12 V / 2400 mA, +5 V / 8000 mA
• 6 Doepfer A-100 V6 Bus Boards with slots for up to 132 modules
• Usable depth for modules: 70 mm in the area of the power supply unit, otherwise 100 mm
• External dimensions with lid (W x H x D): approx. 90 x 48 x 23 cm (18 cm without lid)
• Weight incl. lid: approx. 14 kg

• 256 Stages BBD
• Width: 14 HP
• Depth: 60 mm
• Current consumption: +80mA (+12V) / -60mA (-12V)

• With 4 rows and 4 columns
• Unipolar / Bipolar mode switchable on each column
• Suitable for both control voltage and audio
• Width: 20 HP
• Depth: 20 mm
• Power requirements: +30 mA (+12 V) / -30 mA (-12 V)

• Simple amplifier
• Is suitable for control voltages and audio signals via DC coupling
• Selectable maximum amplification: 1, 2 or 4 (switchable)
• Level controls
• 2 Peak LEDs
• Eurorack format
• Width: 4 HP
• Depth: 20 mm
• Power requirements: +20 mA (+ 12V) / -10 mA (-12V)

• Width: 4 TE / HP
• Depth: 35 mm
• Power requirement: +50mA (+12V) / -0mA (-12V)
• Black front panel

The A-156 Module is a dual control voltage quantiser. A quantiser converts a continuous input control voltage in the range of 0 ... 10V into a stepped output voltage in the same voltage range. The possible steps in the A-156 are not restricted to the usual half-tone grid (ie gradation in 1 / 12V steps) but also allows other scales of the grid such as the major scale, minor scale, major chord , Minor chord, fundamental fifth and the inclusion of sixth or seventh in the chords. The voltage values at the input are only converted into discrete voltages at the output, which meet the selection criterion for the permissible voltage grid (for example a minor seventh chord). The operating mode for Quantiser 1 is set with 3 tilt switches with center position. The Quantiser 2 is fixed to the half-tone grid.

For each of the two Quantisers there is a control input (CV In), a control output (CV Out), a trigger input (trig in) and a trigger output (trig. Out). If no signal is present at the trigger input (socket open), the quantisation is carried out continuously. If, however, a square-wave signal is applied there (from an LFO or the MIDI-SYNC interface for example), the quantisation is always performed only at the rising edge of the trigger signal. The quantisation process can thus be synchronised with other processes on demand. At the trigger output, a pulse appears whenever a quantisation (or a step change in the output voltage) occurs. For example, an envelope generator (ADSR) can be started.

In addition, the module has a common transpose input, which can be added to both quantisers and is quantised in a halftone grid. A typical application for this is to transpose a quantized sequence (generated by the A-155) with a second control voltage (from the MIDI CV interface for the example).

• Quantisation of a tone sequence from the A-155 into a fixed grid (halftones, only major scale, minor scale only)
• Quantise the control voltage of a Trautonium manual A-198, Theremin A-178 or Light-to-CV module A-179 to get always half-tones, scales, or chord sounds
• Arpeggio-like sound sequences with LFO, Random, Noise, ADSR etc. as input voltage

• Bi-directional control voltage quantiser
• Converts continuous input voltage into step output voltage
• Euro rack format
• Width: 8 HP
• Depth: 55 mm
• Power consumption: +50 mA (+ 12V)/ -10 mA (-12V)

• Consists of four independent envelope generators
• Operation as AD generators or AD-LFOs possible
• Euro rack format
• Power Requirements: +70 MA (+ 12V) / -50 mA (-12V)
• Width: 26 HP/ 131.8 mm
• Depth: 50 mm (measured from the rear of the front panel)

• Electronic 4-position rotary switch
• Trigger input
• Reset input
• 4 Inputs
• 4 Outputs
• Voltages of -8V to + 8V can be processed
• Euro rack format
• Width 4 HP
• Depth: 35 mm
• Power consumption: +20 mA (+12V)/ -10 mA (-12V)

• Integrated power supply A-100SSB: +12 V / 340 mA, -12 V / 340 mA
• A-100LC3 version shortened to 48 HP
• Built-in bus board with 12 module slots
• Housing made of untreated wood - subsequent painting by user possible
• Dimensions (W x D x H): 262 x 158 x 154 mm
• Internal dimensions: 48 HP x 3 U
• IEC socket at rear
• Includes power supply cable

• 9U with three module rows
• External dimensions (W x H x D): Approx. 445 x 420 x 160 mm
• Internal dimensions (W x H x D): 3 x 84 HP x 3 U
• Usable depth for A-100 modules: About 80 mm in the area of the power supply (bottom right), otherwise around 100 mm (measured from the inside of the front panel)
• Weight without module: 4.3 kg
• PSU3 power supply (+12 V/2000 mA, -12 V/1200 mA,+5 V/4000 mA, 100 - 230 V)

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.

Module A-120 is a voltage-controlled 24 dB low-pass filter, which filters out the high frequency components from a sound spectrum while allowing the low frequencies to pass unhindered. The cut-off frequency (corner frequency) determines the point at which this effect occurs. They can be set or modulated both manually and via control voltages (filter modulation, with an LFO for example).

The VCF1 is configured as a "transistor cascade" with an edge slope of -24 dB / octave, which is also used in various Moog synthesisers, This results in the typical, "legendary" Moog sound. The resonance (emphasis) can be adjusted at the VCF 1 up to self-oscillation. In this case, the filter operates as a sinusoidal oscillator.

• Vintage edition with black front panel
• Voltage-controlled 24 dB low-pass filter
• Black front panel
• Width: 8TE / 40.3 mm
• Depth: 65 mm (measured from the back of the front panel)
• Power requirements: 30mA (12V) / -20mA (-12V)