Synth modules

Notes: TM is a probabilistic random sequence generator based on the research of Alan Turing. His Turing machine was a mathematical model of computation that could, in theory, create any output based on a set of instructions and input variables. In a similar way, the TM chooses random values for steps in a sequence based on the user's probability settings. By manipulating probability and sequence length, the module can generate an infinite number of sequences. Whether you're looking for a controlled random source, or an evolving melody generator, TM has you covered.

Notes: Mix is a 4 channel mixer that is great for audio or control voltage signals. Up to four inputs can be combined to a single output each with its own level control.

Notes: Module A-147-5 contains four voltage controlled low frequency oscillators (VCLFO) with triangle waveform outputs. All LFOs share a common frequency control. Each of the LFOs 2, 3 features a Delta control which is used to shift the frequency of the LFO in question up or down. With the Delta controls at center positions the frequencies of all LFOs are roughly the same. To control the frequencies by external control voltages four CV inputs are available which follow roughly the 1V/oct standard.

The module has these controls and in/outputs available:

Control F: manual control of the frequency for all four LFOs
Control Delta F2, F3 and F4: manual control of the frequency shift up/down for the LFO in question
Sockets CV 1...4: Frequency control voltage inputs (normalled from top to bottom)
Sockets with triangle symbol 1...4: triangle outputs
LEDs: visual displays of the triangle outputs (red = positive, yellow = negative output voltage)

Application examples:

Generation of four triangle modulation signals with a common frequency control for all LFOs and individual controls for the frequency deviation of each LFO, manually adjustable and controllable by external control voltages
Generation of modulation signals for polyphonic FM/PWM applications. For this the four CV inputs are connected to the same control voltages which are used to control the frequencies of the corresponding VCOs. That way each LFO follows the frequency of the associated VCO with the possibility to control the frequency of all VCOs (control F) and the frequency deviations (Delta F controls). For the simultaneous modulation depth control the Quad VCA module A-130-4 is recommended.
Generation of complex modulation signals by summing up the outputs (e.g. by means of a mixer module A-138n / A-138i / A-138j)

Technical notes:

The level of the triangle outputs is about +/-5V (10Vpp)
The manually adjustable frequency ranges from about 0.025 Hz (about 40 seconds) to about 50 Hz with the delta controls of LFOs 2, 3 and 4 about center position
The frequency deviations adjusted by the delta controls are about +/-1:5. Example: with 1 Hz in center position the frequency shift ranges from about 0.2 Hz in position -5 to about 5 Hz in position +5 (1 Hz/5 = 0.2 Hz, 1 Hz*5 = 5 Hz).
The manual frequency controls and the control voltage inputs have an exponential control behavior
With external control voltage the max. frequency is about 150 Hz, the minimum frequency
The scale of the CV inputs is roughly 1V/oct (not adjustable)
The CV inputs are normalled from top to bottom. Provided that only socket CV1 is patched CV1 controls the frequencies of all four LFOs.
When each CV input is patched to it's own control voltage each LFO is controlled individually by it's own CV. In this case CV1 controls only the frequency of LFO1.
Internally the rectangle outputs are available at four terminals (typ level +/-10V or 20Vpp). If required they can be wired to four sockets of a DIY breakout module made by the user, 1k protection resistors are recommended to avoid short circuits. If lower levels are required passive attenuators (voltage dividers) may be used.
Internally is even an (unbufferd) triangle sum signal available. For this each of the four triangle outputs is simply connected to the sum output terminal via a 47k resistor. This output has high impedance and should be buffered or amplified to avoid level drop when the load changes (e.g. by means of an A-180-3 or A-180-4 or A-183-3).
By changing the values of the capacitors in the LFO circuits even other frequency ranges are possible (e.g. Quad VCO to form kind of a cloud VCO). Pay attention that the accuracy of the CV input scales is not sufficient for precise 1V/oct VCO applications. The 1V/Oct scales cannot be adjusted and the circuits are not temperature compensated.

Dimensions
4 HP
45 mm deep

Notes: Enter a galaxy of rich and vibrant delays. The Dreadbox Nostalgia 3 Stage Delay is a superb effect module that can give you amazing results in moments. Delay is a true staple in the effects world and it can take your modular music to the next level via just a few cables.

The Dreadbox Nostalgia 3 Stage Delay is ideal for a range of modular music styles, from ambient to acid house. This 10HP module fits snugly in your system and has enough CV control to keep even the most avid patcher satisfied.

117 mA +12V
25 mA -12V
35 mm deep
10HP

Notes: Lots of functionality in a compact format thanks to Doepfer's typically smart approach. Eight linear VCAs with three mixers built in for good measure. Can be used for both audio and CV signals. Versatile.

Supplier notes:
Module A-130-8 contains eight linear voltage controlled amplifiers (VCAs). Each VCA features a control voltage input (CV), a signal input (In) and a signal output (Out). In addition three mixers are included: the socket labelled "1-4" outputs the sum of the VCAs 1-4, the socket labelled "5-8" outputs the sum of the VCAs 5-8, the socket labelled "1-8" outputs the sum of all eight VCAs.

The signal inputs are able to process levels up to 10Vpp without clipping. Each CV input is equipped with a trimming potentiometer that is used to adjust the sensitivity of the CV input in question. In the factory the module is adjusted for the CV range 1...+5V but can be re-adjusted by the user for other control voltage ranges (e.g. 0...+10V).

The amplification range for each single VCA is 0...1. The signals of the sum outputs have a lower amplification to avoid distortion.

The VCAs and mixers are fully DC coupled, i.e. the module can be used for the processing of both audio and control voltage signals. The control voltage and signal inputs can be normalled by means of small solder pads (e.g. 1 > 2 > 3 > 4 and so on, or 1 > 5, 2 > 6, 3 > 7, 4 > 8 for the stereo application mentioned below).

Typical applications:
any kind of VCA application (e.g. voltage controlled attenuation of audio or control voltage signals)
two voltage controlled mixers with four channels each
voltage controlled stereo mixer with four channels each, for this the control voltage inputs have to be correspondingly patched or internally normalled: CV1=CV5 /CV 2=CV6 / CV3=CV7 / CV4=CV8
voltage controlled mixer with eight channels
add-on for the planned Joystick module A-174-4

HP : 6

Notes: Uni is a triple attenuverter utility module designed to give cases gigantic macro control knobs.

Inputs:

CV inputs 1 and 3 - CV input for bidirectional attenuation. When input cables aren't plugged into these jacks, 5v reference signals will be used.
CV input 2 - CV input for either unidirectional or bidirectional attenuation. When an input cable isn't plugged into this jack, a 5v reference signal will be used.
Switch - toggles CV input 2 between unidirectional and bidirectional attenuation.

Outputs:

CV outputs 1, 2 and 3 - attenuated CV output. If no cables are plugged into an output jack, it is summed into the subsequent output jack.

25 mA +12V 20 mA -12V 0 mA 5V
10 HP 27mm deep

Notes: Module A-160-2 is an enhanced version of the standard clock divider A-160. The module is a frequency divider for clock/trigger/gate signals, designed to be a source of lower frequencies, particularly for rhythm uses. The Clock input will take any digital signal from, eg. LFO, MIDI sync, or the gate from a MIDI-CV interface. At the outputs, you have access to three sets of seven different sub-divided clock signals, from half the clock frequency down to 1/128. The low/high levels of the output signals are 0V and about +10V.

The A-160-2 also has a reset input. Whenever a reset signal is sensed, all outputs are set to certain levels which depend upon the selected mode.

These are the most important features of the module:

Three different sets of dividing factors, selected by a three-position switch at the front panel:
- Power of two: 2, 4, 8, 16, 32, 64, 128
- Prime numbers: 2, 3, 5, 7, 11, 13, 17
- Integer: 2, 3, 4, 5, 6, 7, 8

Two output modes, selected by a two-position switch at the front panel:
- Gate mode: outputs act like the outputs of typical binary dividers
- Trigger mode: in this mode the outputs are AND-wired with the clock signal (i.e. the clock pulsewidth affects the pulsewidth of the outputs)
- Clock edge type selected by a jumper on the pc board:
- Positive: the rising edge of the clock signal triggers the state change of the outputs
- Negative: the falling edge of the clock signal triggers the state change of the outputs

Reset behaviour by two jumpers on the pc board:
- Level triggered: the level at the Reset input triggers the Reset
- Edge triggered: the edge of the signal at the Reset input triggers the Reset
- Positive: a high level (> 2.5V) or the rising edge at the Reset input triggers the Reset
- Negative: a low level (< 1 V) or the falling edge at the Reset input triggers the Reset

Output polarity selected by a jumper on the pc board:
- Positive: non-inverted outputs
- Negative: all seven outputs are inverted

Width: 4HP / 20mm
Depth: 35mm (Measured from the rear side of the front panel)
Current: +12V: +50mA, -12V: -0mA

Notes: The 2hp VCA is a dual, linear VCA. It uses the renowned 2164 SSM architecture, giving it extremely low distortion and high quality audio outputs. With a CV input attenuator, and DC-coupled inputs this is your new go-to module for voltage controlled amplification of audio or CV.

Notes: MIXZ is a multi-channel mixing module for mixing audio, CV, and gate signals with excellent linear response and low noise. Balancing a clear visual layout and multiple mixers in a small footprint makes the MIXZ easy to use in a variety of configurations within a modular synth. Its high-quality analog mixing circuitry makes for a great sounding mixer with plenty of headroom, providing a smooth, organic merge of dynamics and excellent separation of mixing sections and channels. MIXZ has three sections:

Mixer A: a low-noise, 4-channel mixer with independent gain control for each channel.
Mixer B: a low- noise, 4-channel mixer with master gain control.
MixBus: a multi-channel mixer that mixes signals from modules utilizing the Tiptop MixBus.

Mixer A and B can be configured as either two independent, 4-channel mixers or as a single 8-channel mixer. If the output of Mixer A is not in use, then Mixer A will be routed internally to Mixer B forming the 8-channel mixer.

Tiptop MixBus is a new method we have developed to mix audio signals through the Eurorack power bus board without patch cables. A little bit of magic, eh? Although this technique is not ideal for a low-noise mix, we found it to be useful for some applications, including mixing our drum modules, which all have a MixBus-enabled output. The result is that your drum modules are always available and mixed on the master out of the MIXZ with a flip of a switch. This will save you time and frees up cables for repatching sound again and again, while keeping the channels of MIXZ free to bring other signals into the mix.

Combining the MixBus with Mixer A and B, the MIXZ sums dozens of channels in only 10HP.

Dimensions:
10 HP
36 mm deep

Current draw:
14 mA +12V
14 mA -12V

Notes: A-133-2 is the slim version of the A-133 but has some additional features and improvements available compared to the A-133.

Module A-133-2 can be used for a lot of applications: as a simple VCA, or a voltage controlled polarizer/attuverter, or a voltage controlled inverter up to a DC coupled ring modulator. In principle the module contains two special voltage controlled amplifiers (VCAs) that allow both positive and negative amplification.

The overall amplification is definded by the sum of the voltage generated by the Man control, the external control voltage CV and the position of the CV control which works as an attenuator for the external control voltage. Without external CV the amplification is +1 when the Man control is fully CW. In the center position the amplification is zero and fully CCW it's -1 (i.e. the incoming signal is inverted). By means of the external control voltage CV the manually adjusted amplification can be modulated. CV can be both positive or negative (i.e. bipolar) to obtain positive or negative amplification values controlled by the external CV.

In addition the CV signal can be modulated via the modulation control input Mod by means of another control voltage. The Mod socket is normalled to +5V, i.e. a constant positive voltage is used as modulation CV provided that no plug is inserted into the Mod socket.

The current amplification is displayed by a dual color LED (note: it's not a signal display but indicates the amplification, probably yellow = positive amplification, red = negative amplification)
Application examples:
voltage controlled amplifier (VCA) with pure positive overall amplification (Man + CV)
voltage controlled inverter with pure negative overall amplification (Man + CV)
voltage controlled polarizer/attuverter overall amplification changing between positive and negative (Man + CV)
DC coupled ring modulator with offset feature, the "classical" ring modulator corresponds to Man=0 and symmetrical audio signals for In and CV
additional effects by means of the modulation feature of the CV signal (using the Mod input)

Notes: Erica Pico VCF1, is a younger brother of Erica Black Polivoks VCF, designed on the similar topology using rare Russian op amps. As result you get a filter great for acid bass lines, screaming resonance sweeps and deep wobbles.

Features:
- Lowpass and bandpass modes
- Self oscillation
- Rare russian opamps used
- Input protection against overvoltage

Dimensions
3 HP
35 mm deep

Current Draw
12 mA +12V
11 mA -12V

Notes: Theremin module for generating a variable control voltage by approaching/removing hand to/from an antenna.

The distance range is about 30 cm. Additionally the module is equipped with a Gate output with adjustable threshold level. To simulate the original Theremin two A-178, a VCO (e.g. A-110) and a linear VCA (e.g. A-130 or A-132) are required. But of course the A-178 can be used to control other functions in the A-100 (e.g. filter frequency, modulation depth and/or speed, tempo, attack/decay time and so on).

The CV output voltage of the A-178 can range - according to the setting of the front panel controls - from -10V...+10V.

The gate output switches from 0V to about +10V.

Power consumption: 60mA at +12V and 20mA at -12V

Depth: 40mm

HP : 8

Notes: An interface for the case 1/4" jacks in Intelljel cases. The jacks are marked as if they are part of the case, so the jacks marked out, require an input.

The module sports both input and output for either a consumer line level (0.447Vpk) or a professional line level (1.095Vpk). These levels are controllable via jumper on the back of the module. It can also have a single input and output channel switched to pedal level. The case output is fed to the headphone amp that has a corresponding level control. The module otherwise does not have any level control and relies on using a VCA or other module to perform any level controls.

The module can essentially be run in one of three modes:

1) Stereo line level in and out

2) Stereo line level in and out via the left side and mono pedal in and out on the right side. In this mode the stereo line levels leverage TRS on the 1/4" jacks. You can use the included 3.5mm couplers to get TRS on the 3.5mm side.

3) Mono line level in and out via the left side and mono pedal in and out on the right side.

For Palette 64hp users only have two 1/4" jacks. You can choose if you want to use the case jacks as either inputs, outputs, or one input and one output.

Notes: ADSR is a four stage linear envelope with two expressive ranges. Each stage can be modified independently allowing for the creation of complex, multi-segment envelopes. Great for modulating filters, VCAs, and oscillators.

Notes: Introducing the BD808, part of our new series of drum modules that brings analog percussion into the modular synth world, instantly turning your system into a self-contained music machine. Its small size, minimalist design, and modern production methods have allowed us to bring the world's most famous bass drum sound generator back at a very low cost. The real thing is here again.

The BD808 is the Roland TR-808's Bass Drum circuit adapted for use in Eurorack format and tuned to sound like a machine that comes fresh off the original 80's assembly line. The adaptation to modular format has allowed us to add some special features like independent Accent levels, a high-powered gain stage, dual-input pulse-shaper, and extended decay - all without compromising the signature sound of the TR-808.

A widely used technique with TR-808 machines is to run the drum sounds through outboard amplifiers to add gain and then pass the sound through just about anything to generate additional harmonics caused by clipping and distortion. In the BD808, we have already included this high-powered output gain stage capable of producing signals up to 20Vpp, extending from the original palette of sounds and allowing you to get an assorted array of harmonized bass drums ranging from sharp attacks to crushed tones using this simple yet effective technique! On the inputs, we have also designed a dual pulse-shaper circuit so you can trigger your BD808 with Trigger/Gate signals from step sequencers, clock dividers, or any other pulse/clock sources. This saves you the need to shape the pulses sent to the module and ensuring the same stable sound at its peak power, regardless of differences in your pulse source.

All these little, but unique, features make integrating this legendary sound generator into your modular easy, unleashing the power of real analog drums and making those speaker cones shake.

Notes: This is a 4 stereo channels expansion. Several of this modules can be added to get more stereo channels. Every channel features:
Stereo input (L works as mono in)
SEND A control (switchable PRE/POST, in PRE mode the signal is present regardless to the ON/OFF/CUE switch position and channel volume control)
SEND B control (post-fader)
PAN control (only affects the master bus)
VOLUME control (affects the master, cue and POST sends)
ON/OFF/CUE switch: ON- channel is routed to the master bus
OFF- channel is muted
CUE- channel is routed to the cue bus

15 mA +12V
15 mA -12V

Notes: An exact hardware replica of the Mutable Instruments Ears, which is based on the Music Thing Modular's Mikrophonie.

The ridges on the panel are less defined than on the Mutable version, so the texture is a bit more subtle.

Notes: This is a 4 mono channels expansion. Several of these modules can be added to provide more channels. Every channel features:
- Mono input
- Vactrol Gate (plug a CV into the GATE IN to modulate the volume of a channel, just like a classic VCA. When nothing is plugged in the GATE IN, the gate is normalled to fully open)
-SEND A control (switchable PRE/POST, in PRE mode the signal is present regardless to the channel volume control but only if the channel switch is in ON position)
-SEND B control (post-fader)
-PAN control (only affects the master bus)
-VOLUME control (affects the master, cue and POST sends, does not affect PRE-fader send)
-ON/OFF/CUE switch: ON - channel is routed to the master bus
OFF - channel is muted
CUE - channel is routed to the cue bus

13 mA +12V
8 mA -12V

Notes: This mixer has six DC-coupled inputs, making it perfect for mixing both audio or CV signals from sources such as VCOs, LFOs and envelopes etc.

Each channel features a unity-gain, linear attenuator.

Specifications

Format: Eurorack
Width: 12hp
Depth: approx. 25mm
Power consumption:
+12V: 10mA
-12V: 10mA
+5V: 0mA

Notes: Navigator is a compact, multi-use voltage utility designed to bring playable control to CV sources in your rack. The combination of normalled voltages and mixing allows you to attenuate, polarize and offset signals to modulate parameters exactly within the sweet spot of another module's CV input. Navigator is a compact, multi-use voltage utility designed to bring playable control to CV sources in your rack. The combination of normalled voltages and mixing allows you to attenuate, polarize and offset signals to modulate parameters exactly within the sweet spot of another module's CV input.

Details:

4hp

25mm deep

11 mA on +12V, 8 mA on -12V, 0 mA on +5V

Notes: 3xMIA is a 6-channel attenuverting mixer/offset/scale/polarizer

3 blocks of 2-channel attenuverting mixers, using dual concentric pots. Each channel can be switched to mix with the subsequent channel, allowing for 2-2-2, 4-2, 6 mix configurations.

With nothing plugged into an input, an offset is normalled to that channel. The inner knobs control the A inputs, while the outer knobs control the B inputs.

DC coupled, so it can be used for audio, CV, or both at the same time.

80 mA +12V
80 mA -12V
35 mm Depth
24HP wide

Notes: 3xMIA is a 6-channel attenuverting mixer/offset/scale/polarizer.

3 blocks of 2-channel attenuverting mixers, using dual concentric pots. Each channel can be switched to mix with the subsequent channel, allowing for 2-2-2, 4-2, 6 mix configurations.

With nothing plugged into an input, an offset is normalled to that channel. The inner knobs control the A inputs, while the outer knobs control the B inputs.

DC coupled, so it can be used for audio, CV, or both at the same time.

80 mA +12V
80 mA -12V
35 mm Depth
6 HP wide

Notes: 6xMIX is a six channel audio (AC coupled ) mixer, channels arranged in three groups with separate outputs having led indicators. Each group can be switched to mix with the subsequent group, allowing for 2-2-2, 4-2, 6 mix configurations. The module can also be used to mix two stereo channels plus separate group of two mono channels. Perfect audio performance with the lowest noise and distortion amounts.

The inner knobs control the A inputs, while the outer knobs control the B inputs.

Dimensions
6 HP
35 mm deep

Current draw
50 mA +12V
50 mA -12V

Notes: 3xMIA is a 6-channel attenuverting mixer/offset/scale/polarizer

3 blocks of 2-channel attenuverting mixers, using dual concentric pots. Each channel can be switched to mix with the subsequent channel, allowing for 2-2-2, 4-2, 6 mix configurations.

With nothing plugged into an input, an offset is normalled to that channel. The inner knobs control the A inputs, while the outer knobs control the B inputs.

DC coupled, so it can be used for audio, CV, or both at the same time.

80 mA +12V
80 mA -12V
35 mm Depth
6 HP wide

Notes: Module A-130-2v is composed of two identical voltage controlled amplifiers (VCA). Each VCA has a manual gain control (also named Initial Gain) and a control voltage input with attenuator. The character of the control scale can be switched to linear or exponential. All inputs and outputs are DC coupled. Consequently the VCAs can be used to process both audio and control voltages (e.g. for voltage control of the level of LFO or envelope signals). The signal input has no attenuator available but is capable to process up to 16Vpp signals (i.e. -8V...+8V) without distortion. For the processing of higher levels an external attenuator (e.g. A-183-1) is recommended.

The amplification range is 0...1. Even with a higher external control voltage the amplification remains at 1 (kind of "amplification clipping" at 1).

Controls (for each of both units):

Gain: manual gain control (Initial Gain) in the range 0...1
CV: attenuator for the CV input
lin/exp: switches the VCA characteristic to linear or exponential, in center position the VCA is off (mute function)
Inputs and outputs (for each of both units):

CV: control voltage input, min. +5V required for max. amplification (1) with CV control fully CW and Gain fully CCW
In: signal input, max. 16Vpp (+8V...-8V) without distortion
Out: signal output

A-130-2v is the slim version of module A-132-3 and offers essentially the same features. But the distances between the controls are smaller and rubberized small-sized knobs are used. In return the front panel has 4 HP only which is half the width of the A-132-3. The module is primarily planned for applications where only limited space is available.

Power consumption: 30mA at +12V and 30mA at -12V

Depth: 50mm

HP : 4

Notes: Euclid is a rhythmic pattern generator based on ideas originally presented by Euclid, the Greek mathematician. The Euclidean algorithm can be adapted to create rhythms by taking the total number of active steps in a sequence, and then distributing them across the entirety of the pattern.

This creates cyclical rhythms that are immediately musical and can be used for everything from EDM to IDM. Bring your patches full circle with Euclid.

Notes: The Row Power 25 is a clean, regulated, and protected power supply module for Eurorack systems. It requires a barrel-style power brick (15V - 20V DC) and supplies power to modules via flying bus cables, direct connection, and/or bus boards.

The Row Power 25 provides 25W of power for any Eurorack modules (typically 4-10 modules*):

+12V @ 1.4A maximum, 1.0A recommended
-12V @ 0.8A maximum, 0.5A recommended
+5V @ 1.0A maximum, 0.8A recommended

*number of modules can vary depending on each module's power consumption.

Simply plug a universal power supply (laptop style) into either of the barrel plugs on the 4HP panel. Connect your modules via flying-bus cables or the Bus Stick.

Multiple Row Power modules can be powered from a single power brick by daisy-chaining with an inexpensive barrel cable. The Row Power 25 can also be daisy-chained to Pods. Each Row Power and Pod will be independently regulated and protected for ultra-low cross-talk between rows.

Notes: Unlock the potential of the Quad LFO with the LFO Phase Expander. Each expander gives you three outputs that duplicate the LFO with a fixed phase difference. The first ranges from 0- to 180-, the second from 90- to 270-, and the last from 180- to 360-. Along with the original output, this gives you four phases of modulation. These are easily tuneable to quadrature (all knobs centred), but also any arbitrary phase relationship. You can attach up to four expanders, one for each LFO, giving you up to sixteen modulation sources.

A multiphase LFO is extremely useful for building rhythmic modulations, particularly when paired with analogue logic, such as provided by Babel. Further, regardless of the waveform selected on the Quad LFO, the output of the Phase Expander is always a sine wave. This gives you the useful possibility of having three rhythmically related phases of an LFO synced to a clock signal.

Other than rhythmic modulations, the most common use of a multiphase sine LFO is in creating panning and crossfade controls that sound correct using only one or more VCAs. This is useful in panning sounds back and forth, rotating a sound in quadraphonic space, creating Shepard tones, etc.

Even when you don't have a specific need for exact phase relationships, a multiphase LFO gives you a convenient way to expand your palette of potential modulators, adding three related but distinct waves.

Specs

Size: 6HP
Depth: 22mm
Power Consumption: +12V 21mA, -12V 21mA
Output Swing: -5V - +5V peak
Output Impedance: 1kO
Output Drive: 2kO (min), 20kO+ (ideal)

Notes: Module A-118-2 generates the signals white noise, colored noise, continuous random voltage and stepped random voltage.

The noise signal is generated 100% analog by amplification of the noise of a transistor. White and colored noise are usually used as audio sources. The random voltages are normally used as control voltages (e.g. for filter frequency or any other voltage controlled parameter).

The A-118-2 gives you the ability to mix the relative amounts of Red and Blue noise (low/high frequency component) in the colored noise output.

For the continuous random voltage the rate of change (Rate) and amplitude (Level) of the random voltage can be adjusted. The continuous random voltage is used as source for the S&H/T&H unit. The type of operation can be set to S&H (sample and hold) or T&H (track and hold). When T&H is chosen the output signal follows the input signal as long as the Clock input is "high". As soon as the clock signal changes to "low" the last voltage is stored. When S&H is chosen the input signal is sampled at the rising edge of the Clock signal. For the Clock signal a "digital" signal (e.g. Clock, Gate, rectangle output of an LFO) is required. Dual color LEDs are used to indicates the continuous and stepped random voltages.

Controls:
Blue: share of the high frequencies in the the colored noise output
Red: share of the low frequencies in the the colored noise output
Rate: rate of change of the continuous random voltage
Level: amplitude of the continuous random voltage
TH/SH: switches between T&H und S&H

Inputs and outputs:
RND: continuous random voltage output (with LED display)
TH/SH: stepped random voltage output (with LED display)
Clk: Clock input of the S&H/T&H unit
C Noise: colored noise output
W Noise: white noise output

Important notes:
After power on it takes a few minutes until the two noise signals and the random signals are generated. The module is not faulty when after power on the signals do not appear immediately!

The S&H/T&H function is realized by pure analog circuitry (electronic switch followed by a holding capacitor and buffer). Consequently the output voltage drifts a bit in the holding state because the capacitor is discharged by parasitic resistors. The drift depends also upon environmental conditions like humidity or temperature.

The level of the random voltage changes with the settings of the Blue and Red controls. Especially the Red control affects the random voltage level (which is derived by low pass filtering from the colored noise signal) because the Red control changes the share of the low frequencies in the colored noise signal. The effect of the Blue control is much smaller because it changes the share of the high frequencies in the colored noise signal which are filtered out by the low pass of the random circuitry.

Power consumption: 20mA at +12V and 20mA at -12V
Depth: 40mm
HP : 4

Notes: Two channel USB module.

Standard Mode - Send two channels into your USB device and receive two channels from USB.

Insert Mode - Send two channels to your USB device and get a copy of the sent signal in the outputs.

Toggle between the modes via a pair of jumpers on the back. The USB-B to USB-A cable is provided with the module. Why use the cutting edge USB-B? I felt the jacks were way more sturdy than mounting USB-C jacks vertically.

Expandable - Bartender, Barbacks, DVCA, Cast Iron, Mingles, and USB-2CH can all be connected with Dupont cables (aka female to female breadboard cables) via pin headers on the back of the modules. Connecting the in and out pins will send/receive the audio into the next module.

Width: 4HP
12V: 10mA
-12V: 10mA

Notes: PanMix Jr is a high quality 3 channel mixer with manual panning and volume controls with dual concentric knobs. Each channel's output is separately available. Also channels 1 and 2 can be switched to be mixed with the subsequent channel, allowing for 1-1-1, 1-2, 3 mix configurations. Equal power pan law (3dB) is provided. Left and Right led indicators available for all three channels.

Several modules can be chained together via connections on the back side. This connection is possible with other Happy Nerding stereo modules too. At the moment PanMix Jr stereo output can be internally sent to another PanMix Jr, 3x Stereo Mixer and Isolator module. Or stereo signal can be received from another PanMix Jr, OUT, 3x Stereo Mixer, latest revision of PanMix.

55 mA +12V
55 mA - 12V
35 mm Depth
6 HP wide

Notes: PanMix Jr is a high quality 3 channel mixer with manual panning and volume controls with dual concentric knobs. Each channel's output is separately available. Also channels 1 and 2 can be switched to be mixed with the subsequent channel, allowing for 1-1-1, 1-2, 3 mix configurations. Equal power pan law (3dB) is provided. Left and Right led indicators available for all three channels.

Several modules can be chained together via connections on the back side. This connection is possible with other Happy Nerding stereo modules too. At the moment PanMix Jr stereo output can be internally sent to another PanMix Jr, 3x Stereo Mixer and Isolator module. Or stereo signal can be received from another PanMix Jr, OUT, 3x Stereo Mixer, latest revision of PanMix.

55 mA +12V
55 mA - 12V
35 mm Depth
6 HP wide

Notes: A Comparator is an electronic circuit that compares two voltages and switches its output to indicate which is larger. The Comparator operates between -10 or +10V

The Output is always -10V if below Threshold and +10V if above Threshold.

A Rectifier is an electronic circuit that is used to transform AC signals to an equivalent DC signal while removing one of it's polarities, i.e. Positive rectification excludes negative signals and vice-versa.
Both sections can be used to change the shape of any waveform as well as its harmonic content.

FRONTPANEL:
1 Comparator Threshold Knob
1 Comparator Jack Output
2 Comparator Monitor Led1 Common Signal Jack Input
4 Rectificated Outputs

MECHANICAL:
Format: Eurorack
Width: 4 HP
Depth: 2.5 cm

CONTROL VOLTAGE I/O:
CV inputs: i 10v
CV outputs: i10v

ELECTRICAL:
Max current: 30mA
Compatible with +-12v and +-15v power supplies
Bus Board Cable: 8 × 2 IDC (Doepfer style) connector

Notes: MISO is a multipurpose utility module, a laboratory for synthesizing control voltage signals and audio. MISO combines multiple CV tools into one module for making complex CV shapes at the output stage. The name comes from the four main functions available: Mix, Invert, Scale, and Offset.

MISO's 2 sections (1/2 IN and A/B IN) are identical. Each section has two inputs that can be used to Mix signals, Invert polarity/shape, Scale magnitude and Offset voltage. Each function can be used independently or simultaneously with the total shape summed to the mix output.

At the centre of the module is another processor, an accurate smooth linear voltage-controlled crossfader that mixes equally between the outputs of the top and the bottom MISO sections. Feed the MISOs with envelopes, LFOs, Sequences to create new shapes and then crossfade them manually or with CV using the centre section for even further complexity of shapes and animation of control signals. Crossfade between the waveforms of a VCO or audio samples with CV for more motion.

There are an endless number of ways to patch MISO with unexpected and inspiring results. MISO is the kind of module that gives modular synthesizers its incredible replay value, rewarding hours of creative explorations and its experimental and non-traditional mixing.

MISO offers a lot in a small comfortable module that matches Tiptop's system look with clean white faceplate styling. A red/yellow indicator light next to each section makes it easy to see signals and visualize polarity.

Notes: The compact and complete VCA. Filtering and mixing rolled into one powerful unit. The Dreadbox Eudemonia Filter is an analog wave generator processor. It provides accurate mixing capabilities and features a dual filter in series. The filters are a 24dB resonant Low Pass Filter and an 18dB non-resonant High Pass Filter - these allow you to shape your sound before sending to your output. In order to keep things in line, the exponential VCA has a peak indicator to help you reference your levels.

Power Consumption: 61mA @ +12V , 69mA @ -12V
61 mA +12V
69 mA -12V
35 mm deep
10HP

Notes: The Touellskouarn "Sil Kontrollet" eurorack module is a LowPass voltage-controlled filter (VCF) The filter is a 12dB per octave low-pass filter that can be self-oscillated, this way it can produce a sine wave with V/Oct tracking capability. This filter has a unique and distinctive sound, characterized by its aggressive resonance and its ability to self-oscillate. Cutoff can be CV controlled. The module is 6HP wide and is made with quality components such as Nichicon/Panasonic caps and alpha pots.

Power consumption: 20mA at +12V and 20mA at -12V

HP : 6

Notes: 8 triangle LFOs with relative frequencies and CV control.

Output voltage is +/- 5.25v (10.5Vpp).

Upper LFO is the fastest and lower is the slowest one. The frequency ratio between LFOs is approx 3/2 (or 1.5), being at max speed the upper 13.5Hz and the lower one 1Hz .

The frequency range with the potentiometer is 80-90%.

Negative voltages present at the CV input will stop the oscillation of all LFOs, but the potentiometer it's an offset, which means that will act as a manual frequency control and will also set the voltage range for the CV input, allowing negative voltages when set to max.

Dimensions: 4 HP
25 mm deep

Notes: 6xMIX is a six channel audio (AC coupled ) mixer, channels arranged in three groups with separate outputs having led indicators. Each group can be switched to mix with the subsequent group, allowing for 2-2-2, 4-2, 6 mix configurations. The module can also be used to mix two stereo channels plus separate group of two mono channels. Perfect audio performance with the lowest noise and distortion amounts.

The inner knobs control the A inputs, while the outer knobs control the B inputs.

50 mA +12V
50 mA -12V
35 mm Depth
6 HP wide

Notes: BLN is a 4 channel audio level converter designed to interface line or "pro" audio levels to modular audio levels. It features 2 independent converters with 2 channels each.

Converter 1: Line level/Balanced to Modular Level

The inputs for the top converter are for converting -10dB or +4dB signal levels (balanced or unbalanced) to +/-5V modular levels. Each channel can be set individually for +4 or -10 using channel 1 and 2 of the DIP switched

Converter 2: Modular level to Balanced Lined

The inputs for the bottom to converters accept a +/-5V modular audio level and converts them to a BALANCED +4 dB or -10 dB audio level. Each channel can be set individually for +4 or -10 using channel 3 and 4 of the DIP switched.

For balanced signals, simply use a 3.5mm TRS to 1/4" TRS Cable or 3.5mm TRS to 3.5mm TRS cable with a 1/4" TRS adapter. Unbalanced signals should use a 3.5mm TS cable

2HP Width, 32mm Depth

Current Draw: 12/14 mA +12/-12

Please note: This devices uses a polarized power cable, please make sure the red stripe corresponds to the white stripe on the board

Notes: This module connects via 3 pin cable to the Intellijel Pedal I/O 1U module.

It provides the 1/4" TS interface for connecting guitar pedals or instruments.

Dimensions: 8 HP
44 mm deep

Module is a 1U tile.

Current Draw: Module does not draw current

Notes: The 4093 Chaos NAND Synth, in Eurorack form! The 4093 Chaos NAND Synth is a super-modifiable noise generator that will knock your socks off with its sonic potential: low pulsing drones, random robotic chaos, and high-pitched laser sounds!

A great project to begin your explorations into the world of DIY sound synthesis, the PCB was designed with the beginner in mind. Board-mountable switches, socketed IC, hands-on knobs and switches for tone control, and a detailed silkscreen PCB to help you solder components right the first time.

Notes: The 'S.B.G' is a compact utility module intended for the interfacing of guitar effect pedals with your eurorack modular system.

It provides both attenuation and amplification of audio signals for level matching together with a crossfade control to conveniently adjust the wet/dry mix of a processed signal. The module also offers regulation of outgoing CV signals for safer use of pedal expression inputs.

Technical Specifications:

Supply: +/-12V (Reverse voltage protection)
Current Draw: ~30ma
Size: 4 HP
Depth: 22mm (including power header)

Notes: Module A-197-3 is a control unit for RGB LED stripes. The LED stripe is glued e.g. to the inner edges of the cases A-100P6/P9/PMS6/PMS9/PMS12 to illuminate the modules and patching statically or dynamically. Especially during live events the dynamic illumination in sync with the sound is an eye-catcher. Each colour (red, green, blue) has available a manual control for the background brightness and a CV input with attenuator that enables the dynamic brightness controlled by other control voltages of the modular system. For example three envelopes can be used which also control the loudness or filtering of sound processing modules. But even other control applications are possible, e.g. LFO, random voltages, clock/gate/trigger signals, sequencer, Midi-to-CV.

Notes: Following ADDAC System's T-Networks series, the importance of having the right input signal for firing drum modules or envelopes was realised. Gates and Triggers are often looked at as similar signals but at times it really makes a difference and results will change drastically depending if a Gate or a Trigger is fed to the input of such modules.

This led to the simple yet effective Gate to Trigger.
A four channel converter with bypass switch for each channel.

Any input Gate will be limited to a 1ms Trigger.

Tech Specs:
3HP
2.5 cm deep
10mA +12V
10mA -12V

Notes: Passive dual expression pedal attenuator.

Plug any CV or audio source through it and control its amplitude through any standard expression pedal.

Invert switch for inverting the expression pedal action.

Specs:
- Passive Module
- Width: 4 HP
- Depth: 3 cm

Notes: Module A-145-4 is a simple quad LFO (Low Frequency Oscillator). Not a very "exciting" module, just a bread-and-butter device and a simple demon for work. Virtually in every modular system several LFOs are required for modulation purposes. The module contains four simple LFOs with the waveforms triangle and rectangle. A dual colour LED (red = positive / yellow = negative output voltage) indicates the triangle output of each LFO. The frequency range can be chosen for each LFO individually by means of a jumper between about 50 Hz ... 0.04 Hz (about 20 seconds, jumper removed) and about 2Hz ... 0.002 (about 8 minutes, jumper installed).

The module can be treated as a slimmed version of the quad LFO A-143-3 as it has similar features available. But the distances between the controls are smaller and rubberized small-sized knobs are used. In return the front panel has 4 HP only which is less than one third of the A-143-3. The module is primarily planned for applications where only limited space is available. The functional difference compared to the A-143-3 are the missing sawtooth outputs and frequency range switches.

Notes: MAR is a multichannel dual mixer module for the modular synthesizer. Both mixers are capable of mixing audio, CV and gate signals because they are DC coupled. MAR has two independent 4-channels mixers:

Mixer X: Is a four channel mixer with gain control for each channel. The potentiometers use logarithmic tape to have a good control with audio signals. This mixer features two outputs, the mixer output and its inverted. The output level is shown in the LED.

Mixer Y: Is a four channel mixer with gain control for the sum of the Y channels. If no jack is connected to the input Y1, the output of the Mixer X is normalled to Mixer Y. The potentiometer use logarithmic tape to have a good control with audio signals. This mixer features one output, the sum of the 4 channels. The output level is shown in the LED.

This Mixer can work as two 4-1 Mixer, or 7-1 Mixer with global gain control.

INPUTS:
4 Mixer X inputs.
4 Mixer Y inputs.

OUTPUTS:
Mixer X output.
Inverted Mixer X output.
Mixer Y output.
Mixer X + Mixer Y output.

FAST SPECS:
Dual mixer module for the modular synthesizer - Eurorack.
8 HP - 15mm Depth - Skiff friendly.
Both mixers are capable of mixing audio, CV and gate signals.
Mixer X: 4-channel mixer with gain control for each channel.
Mixer Y: 4-channel mixer with gain control for the sum of the channels.
If no cable connected to Mixer Y input 1, the output of the Mixer X is normalled to Mixer Y.
Can work as two 4-channel mixers, or one 7-channel mixer.
The output level is shown in the LEDs.

Notes: Module A-103 is a voltage controlled low pass filter with 18dB/octave slope. The circuit is based on a modified transistor ladder (Moog ladder) and is a reproduction of the legendary TB303 filter.

As for the rest the A-103 is identical to the A-120 Moog low pass filter (same controls, inputs/outputs) only the filter sound is different.

Notes: The 4 Channel Mixer is a basic DC coupled mixer with 4 inputs and 4 attenuators. DC coupled means that it will accept both DC and AC (Audio) signals. As with all Hungry Robot "Modular Boxes" the 4 Channel Mixer can be powered with a simple 9V DC, Negative Center power supply.

PATCH POINTS
-IN (x4): Patch in any audio or CV signal to any of the 4 inputs. (NOTE: Avoid mixing CV and Audio)
-OUT: This output is the sum of the four channels

KNOBS
-LEVEL (x4): Each input has its own attenuator that allow you to bring down the level of the inputs

Dimensions: 4.7" x 2.6" x 1.5"
Power: 9V DC - Negative Center - 2.1mm Barrel

Notes: Featuring the AS3360 IC (based on the classic CEM3360 IC), this linear response VCA (Voltage Controlled Amplifier) is suitable for both audio and CV signals.

It would also be the ideal match with a modulation source such as an exponential envelope generator.

Specifications

Format: Eurorack
Width: 8hp
Depth: approx. 25mm
Power consumption:
+12V: 30mA
-12V: 30mA
+5V: 0mA