Synth modules

Notes: CV Thing is a fully mappable CV to MIDI converter in just 6HP. Its based on our VCMC module, but aiming for small and compact performance rigs. It has eight inputs that can be mapped to any MIDI message quite easily thanks to its simple and intuitive user interface. CCs, Program change ,V/Oct to Note or Clock are some of the messages that can be configured to easily control MIDI gear from your modular rig.

Features:

Class-compliant USB MIDI and TRS connectors.
TRS to DIN5 Type A adaptor included.
8 CV inputs.
Controls fully mappable to any MIDI message (CC, Notes, Program change, Clock, ST/SP, NRPN...)
Configurations are saved both in internal memory and via Sysex.

Specifications:

Current needs: +12V: 50mA, -12V: 4mA
Width: 6 HP
Depth: 25mm, (32mm DIY) including power connector
Aluminium, heat-treated front panel.
Designed, kits prepared and completed modules assembled in Barcelona.

Notes: Hexmix VCA is a compact six channel VCA with an unique response curve range from logarithmic to linear and to exponential using a pot.

All outputs are routed to output six to act as a mixer, with a normalization of each one to remove each channel from the Mix.

The module can act as six independent VCAs as well as a Mixer for all the inputs (Selectable via a switch).

Every VCA has a response pot for the incoming CV, being full logarithmic at maximum setup and full exponential at minimum setup, having the linear response in the center position.

Level pot of each channel is an attenuator of the signal coming out of each VCA.

Jacks are normalled to 10 volts, so when we have no CV present VCA would be fully open and our Level pot will act as a volume.

Specs:
Current needs: +12V: 50mA, -12V: 50mA
Width: 14 HP
Depth: 35mm (including power connector)
Aluminiun, heat-treated front panel.

Notes: Kickall is a 6HP compact synth voice that features everything needed to make a big fat Kick sound. A stable VCO that tracks V/Oct, a couple of VCAs, envelopes for volume and pitch and an aggressive waveshaper.

The module has been designed with a kick synthesis patch in mind.

The audio path consists of a sinewave oscillator that passes across a Square Waveshaper and two VCA's. The first VCA is for the Volume envelope. The second VCA is dedicated to general volume. Thanks to his CV input, it is possible o apply accents or affects the dynamics of notes. Feeding this input with audio generates a basic AM operation expanding the sonic range of the module.

In the control path, KickAll has two envelope circuits to modulate the first VCA oscillator's pitch. Both envelopes are fired at the same time manually or via dedicated trigger input.

Through its Tune input, KickAll tracks eight octaves with high accuracy. Plug your favourite sequencer or CV source to create patterns out of the kick range, or feed it with an audio signal, for frequency modulation Fx.

Specs

Current needs: +12V: 26mA, -12V: 12mA
Width: 6 HP
Depth: 20mm, (28mm DIY) including power connector
Aluminium, heat-treated front panel.
Designed, kits prepared and completed modules assembled in Barcelona.

Notes: Really clever stuff here. The Octaves VCO takes an additive approach, layering harmonics on top of a fundamental frequency to create complex tones. Control the six bands via CV to adjust the harmonic content.

Supplier's Notes:
A harsh and funky take of an additive Oscillator.

Pile up multiplications of your frequency to get a lo-fi-retro wall of squared sound!

You get six doubled frequency pulses, or octaves, with common PWM and volume control for each of them.

The output of each is cascaded to the next one, so you can either have one output with all frequencies or break the chain and get several sums and modulate each independently!

Features
Six bands, multiple of the base frequency.
Square wave oscillator with Octaves selector PWM control and sync.
Range control for Tune pot.
Volume CV control and individual output for each band
Cascaded summing outputs.

Specifications
Current needs: +12V: 110mA, -12V: 84mA
Width: 12 HP
Depth: 22mm (assembled and DIY), including power connector
Aluminium, heat-treated front panel
Designed, kits prepared and completed modules assembled in Barcelona

Notes: *** B-STOCK: Box opened, but product is in excellent condition and in perfect working order ***


Really clever stuff here. The Octaves VCO takes an additive approach, layering harmonics on top of a fundamental frequency to create complex tones. Control the six bands via CV to adjust the harmonic content.

Supplier's Notes:
A harsh and funky take of an additive Oscillator.

Pile up multiplications of your frequency to get a lo-fi-retro wall of squared sound!

You get six doubled frequency pulses, or octaves, with common PWM and volume control for each of them.

The output of each is cascaded to the next one, so you can either have one output with all frequencies or break the chain and get several sums and modulate each independently!

Features
Six bands, multiple of the base frequency.
Square wave oscillator with Octaves selector PWM control and sync.
Range control for Tune pot.
Volume CV control and individual output for each band
Cascaded summing outputs.

Specifications
Current needs: +12V: 110mA, -12V: 84mA
Width: 12 HP
Depth: 22mm (assembled and DIY), including power connector
Aluminium, heat-treated front panel
Designed, kits prepared and completed modules assembled in Barcelona

Notes: From trickling hi-hats to thunderous kicks. The Befaco Percall 4-Channel VCA/Delay Envelope Module is designed to take care of all percussive aspects of your Eurorack rig. You'll be able to create a whole host of percussion thanks to the 4 VCAs, volume control and decay options. By using the trigger you'll be free to open the VCA whilst the volume knob helps determine the level of the percussive sound you've sculpted. Take your tones to the next level thanks to the inclusion of an output on the envelope. You can apply this to the pitch of the oscillator to achieve a fat kick drum which offers excellent low frequency energy. The Percall 4-channel module is the ultimate addition to your Eurorack.

Notes: Introducing SUM0, a voltage-controlled oscillator with expanded harmonic possibilities, in a Eurorack format.

The 4 classic waveforms are generated by a meticulously designed oscillation engine.

You can modulate its frequency and its pulse width thanks to its integrated LFO, capable of reaching audible frequencies to achieve expressive modulations with the simple touch of a switch.

Expand the voice of your system by creating complex waveforms and high harmonic content thanks to its output mixer. This mixer also has an input to integrate an external signal to the mix output.

Of course, all its parameters (FM, PWM, SYNC, V/OCT) are at your fingertips through its patch points on the front panel.

And of course, assembled with a load of passion in Bocuma's studio-workshop in Guadalajara.

Nerdy-specs:

22HP
+12V > 12mA -12V > 12mA

Notes: ***B-STOCK: Box opened, but product is in excellent condition and in perfect working order***


Introducing SUM0, a voltage-controlled oscillator with expanded harmonic possibilities, in a Eurorack format.

The 4 classic waveforms are generated by a meticulously designed oscillation engine.

You can modulate its frequency and its pulse width thanks to its integrated LFO, capable of reaching audible frequencies to achieve expressive modulations with the simple touch of a switch.

Expand the voice of your system by creating complex waveforms and high harmonic content thanks to its output mixer. This mixer also has an input to integrate an external signal to the mix output.

Of course, all its parameters (FM, PWM, SYNC, V/OCT) are at your fingertips through its patch points on the front panel.

And of course, assembled with a load of passion in Bocuma's studio-workshop in Guadalajara.

Nerdy-specs:

22HP
+12V > 12mA -12V > 12mA

Notes: A characteristically unique take on mixing from Buchla, with six mono inputs and a built-in mic/guitar pre-amp. Each channel can be cued to a monitor mix, while the first and last channels also include voltage-controlled panning.

Supplier's Notes:
The Tiptop 207t is a modern reimagining of the classic Don Buchla 207 Mixer/Preamplifier from the 1970s 200 Series. This stereo mixer comes with a built-in preamp that allows you to boost external instruments and microphones, making it a versatile tool for any modular setup. The 207t also features a six-channel mixer with a variety of signal routing options, including the ability to route channels to the monitor and L&R signal outputs, with per-channel control over loudness and panning.

Each channel has a Mon switch that sends the channel's signal to the monitor outputs, which are always full-volume and summed to mono, making it useful for basic monitoring applications or rudimentary mixing. The Prog switch sends the signal to the L&R signal outputs, with loudness controlled by the Level Adjustment slider and panning determined by the Channel Assignment knobs. The first and sixth channels offer voltage control of panning; these channels are hard-panned when no CV is applied.

The preamp section features a 1/4" input and multiple gain settings, making it suitable for use with external line level instruments, electric guitars, or dynamic microphones. The continuous amplification control provides added flexibility for your audio needs. Finally, the Expansion In is a stereo input that sums to the left and right main outputs, which is great for chaining multiple 207t modules or adding another stereo source at the final output.

While the 207t's functionality may be simple, it is an essential part of any 200t system, serving as the glue that holds everything together. The Tiptop 207t is a fantastic mixer/preamp option that delivers quality sound and reliable performance.

Buchla 207t Features

Mixer/preamp module based on Don Buchla's original 207 design
Six-channel mixer with per-channel level control and panning
Voltage-controllable panning on channels 1 and 6
Manual panning on channels 2-4
Program switches can act as channel mutes for main outputs
Mon switches route signal (in mono) to Monitor output
Expansion input useful for stereo chaining and more
Re-designed preamp for high audio fidelity
Preamp suitable for use with external instruments, electric guitars, dynamic microphones, and more

Eurorack module
28hp wide

Notes: ***B-STOCK: Box opened, but product is in excellent condition and in perfect working order***


A characteristically unique take on mixing from Buchla, with six mono inputs and a built-in mic/guitar pre-amp. Each channel can be cued to a monitor mix, while the first and last channels also include voltage-controlled panning.

Supplier's Notes:
The Tiptop 207t is a modern reimagining of the classic Don Buchla 207 Mixer/Preamplifier from the 1970s 200 Series. This stereo mixer comes with a built-in preamp that allows you to boost external instruments and microphones, making it a versatile tool for any modular setup. The 207t also features a six-channel mixer with a variety of signal routing options, including the ability to route channels to the monitor and L&R signal outputs, with per-channel control over loudness and panning.

Each channel has a Mon switch that sends the channel's signal to the monitor outputs, which are always full-volume and summed to mono, making it useful for basic monitoring applications or rudimentary mixing. The Prog switch sends the signal to the L&R signal outputs, with loudness controlled by the Level Adjustment slider and panning determined by the Channel Assignment knobs. The first and sixth channels offer voltage control of panning; these channels are hard-panned when no CV is applied.

The preamp section features a 1/4" input and multiple gain settings, making it suitable for use with external line level instruments, electric guitars, or dynamic microphones. The continuous amplification control provides added flexibility for your audio needs. Finally, the Expansion In is a stereo input that sums to the left and right main outputs, which is great for chaining multiple 207t modules or adding another stereo source at the final output.

While the 207t's functionality may be simple, it is an essential part of any 200t system, serving as the glue that holds everything together. The Tiptop 207t is a fantastic mixer/preamp option that delivers quality sound and reliable performance.

Buchla 207t Features

Mixer/preamp module based on Don Buchla's original 207 design
Six-channel mixer with per-channel level control and panning
Voltage-controllable panning on channels 1 and 6
Manual panning on channels 2-4
Program switches can act as channel mutes for main outputs
Mon switches route signal (in mono) to Monitor output
Expansion input useful for stereo chaining and more
Re-designed preamp for high audio fidelity
Preamp suitable for use with external instruments, electric guitars, dynamic microphones, and more

Eurorack module
28hp wide

Notes: More great value from TipTop's Eurorack reissues of classic Buchla modules. Noise sources, random voltages, sample-and-hold and integrator (slew) provide a range of modulation and processing options.

Supplier's Notes:
Offering tonnes of opportunity for creating unique instances of controlled randomness, TipTop Audio's Buchla Model 266t Source of Uncertainty is a recreation of the classic random voltage generator and sculpting module. Bringing back a classic set of Buchla's 200-series modules, the 266t recreates six different tools in one classic interface for all of the Eurorack community to bask in. The 266t divides into two sections of generation and modification, featuring two different processors and four generator types with one producing three flavours of analogue noise, labelled flat, -3dB/oct, and +3dB/oct.

The fluctuating random voltages section features two individual smooth voltage generators for adding wiggles and warbles to your modules, each controlled by a rate parameter with CV inputs for modulation. Right below is the quantized random voltage, offering a stepped random output that randomly decides voltage based upon one of two equations corresponding to a value called "n". Depending on the output, you can tune your range to a set amount of possibilities with n+1 output being more localized to the 5V range and the 2^n output having equal opportunity across all 10 volts. The final generator labelled stored random voltage produces two outputs of stepped voltage with an equally distributed random voltage output as well as a selectable bell distribution output that centres its options based on the probability control.

Looking at the processing section, the top-right sample and hold section is actually a track and hold processor, tracking the cv input and changing only at the next high input on the pulse in. The resulting CV output additionally has two alternate outputs that base off alternative pulse counts, and the pulse output alternatives similarly alternate each pulse count. The final section of the 266t lies in the integrator, featuring a simple yet very handy smoothing processor by determining the time it takes to reach from one CV value to the next. With all this versatility to work amongst many modules or even self-patch for related modulation, the Buchla Model 266t Source of Uncertainty will certainly make any modular system lively.

Specifications:

Size: 24 HP
Depth: 25mm
Power: +12V 150mA / -12V 100mA

Notes: Messor is a stereo compressor with lots of tricks up its sleeves. From gluing a mix together to squashing drums, sidechaining kicks and sculpting transients.

It's a VCA based feed-forward compressor with a high quality low noise signal path. The magic happens in the internal sidechain that shapes the gain reduction envelope.

There are the familiar controls of a compressor, attack, release, threshold, ratio and makeup gain, as well as a switchable high-pass / low-pass sidechain filter.

The ratio can go past limiting and into over-compression, which can completely reshape transients, a great tool for sound design.

Being modular, of course there are CV inputs for Attack, Release and the Filter cutoff.

The Gain CV controls the makeup gain, but also doubles as a Stereo VCA with the Gain knob off.

The gain reduction envelope is also available, for turning filters or other VCA's into compressors for example.

There's a bypass switch, and another Warm/Pure switch, that can bring in a bit of additional saturation and compression in the form of analog tube simulation circuitry.

Lastly there's the possibility to insert an external sidechain, for that classic kick sidechain compression.

Dimensions
8 HP
25 mm deep

Current Draw
45 mA +12V
26 mA -12V

Notes: Messor is an analogue stereo compressor with lots of tricks up its sleeve, in only 8HP.

From squashing drums, sidechaining kicks and sculpting transients, to glueing a mix together, it's a very versatile dynamics manager.

At its core it's a VCA based feed-forward compressor with a low noise signal path. The magic is in the internal sidechain that shapes the gain reduction envelope. This starts with a a switchable high-pass / low-pass filter, before going into a precision envelope follower, controlled by familiar parameters: the attack, release, threshold, ratio and makeup gain.

The ratio can go past limiting and into over-compression, which can completely reshape transients, a great tool for sound design.

Being modular, of course there are CV inputs for Attack, Release and the side-chain Filter cutoff. The Gain CV controls the makeup gain, but also doubles as a Stereo VCA with the Gain knob turned fully CCW.

The gain reduction envelope is also available as an output, for turning filters or other VCA's into compressors for example, or as a standalone envelope follower.

There's a bypass switch, and a Warm mode, that can bring in a bit of additional saturation and compression in the form of analog tube simulation circuitry.

Lastly there's the possibility to insert an external sidechain, for that classic kick sidechain compression.

Dimensions
8 HP
25 mm deep

Current Draw
45 mA +12V
26 mA -12V

Notes: The Cali oscillator is a new and improved version of the classic Buchla 258 wave shaping oscillator with an additional pulse width modulated output. The oscillator features the classic Sine to Square and Sine to Saw wave shaping with dedicated CV control. The Cali Oscillator differs from previous versions of the 258 in that it has a 3-way position switch rather than 2-way. This new middle position features a bonus waveform that will shape from a pulse into a kind of triangular trapezoid shape. The shaping control is more unpredictable in this middle position and the switch reacts to body contact when the wave shape is set low - it can be thought of as an extra bonus waveform, great for producing glitchy sounds! There are dedicated inputs for linear and exponential FM and the Cali also adds a Pulse output with it's own width control and PWM CV input. The behaviour of the pulse output can be affected by the position of the waveform switch and wave shape control. The module features Coarse and Fine frequency controls and an LFO mode, LFO range is accessed via an LED pushbutton that also acts as the LFO speed indicator - the button will light up when the waveform moves through its positive cycle. Because the wave shape modulation is independent of pitch this oscillator is very useful for creating complex timbres whilst retaining musical pitch.

Features

Sine to saw/square waveform output with cv over wave shaping

Pulse output with voltage controlled PWM

Linear FM with attenuator

Logarithmic FM with attenuator

Bonus 'trapezoid' output

Coarse & fine controls with LFO mode

Includes power supply isolation on frequency controls


Width: 12 HP
Depth: 22mm

Power
+12V = 37mA
-12V = 34mA

Notes: Gorgeous vintage-style through-zero FM here, featuring five simultaneous waveform outputs, pulse width modulation, soft sync and a dedicated LFO mode.

Supplier's notes:
The EN129 Thru Zero Oscillator is an all analogue triangle-core VCO specialising in frequency modulation. Analogue through-zero FM modulation produces a wide array of timbres particularly useful for bell like or percussive sounds. Through zero linear frequency modulation can be precisely dialled in thanks to a dedicated CV input attenuator and through zero offset control. Logarithmic FM is also available via it's own dedicated input with attenuator and both FM inputs have an LED to indicate incoming voltages. Simultaneous analogue wave outputs include: Sine, Triangle, Sawtooth, Square and Pulse wave with Pulse Width Modulation. The PWM control goes to zero at either end of it's range, which is very useful for creating rhythmic sounds with voltage control. Furthermore the PWM control doubles up as wave shape modulation for the Sawtooth wave - gradually altering the waveform until it shifts half a cycle. The EN129 features Coarse and Fine frequency controls as well as an LFO mode. LFO range is accessed via an LED pushbutton that also acts as the LFO speed indicator - the button will light up when the waveform moves through its positive cycle. A new addition of a Soft Sync Input allows the phase of the oscillator to be controlled by an external oscillator for an even greater range of timbres.

The EN129 is based on the pioneering work by Douglas Kraul and Bernie Hutchins. You can read the original Electronotes article from 1981 that the design is based upon here.

Features:

Soft Sync Input
Thru Zero Linear FM
Logarithmic FM
Zero to Zero PWM
Sawtooth Wave Shape Modulation
Simultaneous Outputs for: Sine, Triangle, Saw, Pulse & Square
Coarse & Fine Controls with LFO Mode
Includes Power Supply Isolation on Frequency Controls
Power consumption: 51mA at +12V and 47mA at -12V

Depth: 22mm

HP : 12

Notes: The Looping VC-ADSR is a 4-stage, loop-able, envelope generator based on the ENVGEN 8C IC from Electric Druid. The individual sections of the Envelope (Attack, Decay, Sustain, Release, Level and Time) can all be individually controlled via CV.

The module has 5 MODES of operation that can be selected via the pushbutton LED switch with the status indicated by the five LEDs above:

Normal Envelope - Gate signal at the GATE/TRIG input, fires the ADSR.
Trigger Mode - Trigger signal at the GATE/TRIG input fires the AD portion of the envelope. The sustain control determines the final value the envelope rests at after the decay portion has ended.
Gated Looping Envelope - ADSR loops whilst gate signal is high.
Looping Envelope - ADSR loops regardless of gate signal.
LIN response (Hold switch to select between LIN/EXP Mode) - Sets the envelope response to be Linear. The response is Exponential when the status LED is off.
When the envelope is looping, all 5 controls affect the output. Attack and Decay operate, as one would expect. The Sustain control sets the minimum voltage the decay part of the envelope will decay to. The Release sets a release time from the end of the Sustain period to the beginning of the next cycle. When the Sustain is set to 0 you can use the Release control to add a delay between the Attack and Decay cycles.

In Normal Envelope mode the Sustain CV input can be used with an LFO source to add amplitude modulation that gradually increases as the Envelope transitions from the Attack/Decay part of the envelope into the Sustain part. The Level CV is also a useful point for amplitude modulation or can be used for Velocity Sensitivity via CV.

The Time CV is set so that increasing voltage shortens the overall envelope time to better mimic the sounds of percussive instruments.

Features:

5 Modes of Operation: Gate Input ADSR, Trigger Input ADS, Gated Loop, Constant Loop and EXP/LIN Envelope Responses
CV over: Attack, Decay, Sustain, Release, Level and Time
Works with Gate or Trigger Signals from +5V to +12V
CV Input Range 0V to +10V
Output CV Range 0V to +10V


Power consumption: 28mA at +12V and 18mA at -12V
Depth: 25mm
HP : 6

Notes: The updated "Skiff friendly" design of the mml filter now features bipolar "Attenu-verters" for the cv controls as well as an all new red mode!

This new mode activates a feedback distortion circuit capable of actually changing the pitch of the notes coming in to the filter in a musical way that adds instant variety to acid basslines, creates weird and strange alterations to drones or adds some nice overdriven distortion to whatever goes into it!

The multi-mode ladder (mml) filter is based on the classic transistor ladder low pass filter by dr. Robert a. Moog. This filter updates the classic 4-pole ladder design to provide band pass and high pass filter responses as well as the traditional low pass filter. There are 2 bipolar controls with attenu-verters for the cut-off frequency plus a cv input for the resonance.

The core of the circuit features a fully discrete transistor design with an op-amp buffered output, this allows soft saturation of the input signal to get the classic overdriven tones of the ladder filter. A bass compensation circuit has been included to retain the bass response in low pass mode when the resonance is increased. The bass compensation also helps to improve the response of the high pass filter.

The red mode is activated/de-activated by holding the mode button for 0.3s. In this mode the filter cut-off, input volume and resonance all interact and the effect is to produce alterations to the incoming frequencies. The pitches of the audio coming into the filter also affect the alterations as well selecting between low pass, band pass and high pass filter modes whilst in red mode.

Features

Low pass, band pass and high pass modes.
Red mode feedback distortion.
CV controlled resonance.
Added low frequency compensation.
Soft saturation of input.
2 x bipolar attenuverter CV inputs.

Width: 6 HP
Depth: 25mm
Power: +12v = 50ma / -12v = 39ma

Notes: The Timbre is a 6HP Eurorack module based on the wave folder section of the Buchla 259 oscillator as implemented in the Music Easel.

The wave folder adds extra harmonics to input signals that have low harmonic content to create rich and interesting timbres. Typical input sources to use would be Sine and Triangle waves but you are welcome to try other sources as well! The Dannysound Timbre adds an extra input to the Buchla design to allow 2 oscillators to drive the wave-folder simultaneously - this dramatically increases the range of possible tones that can be generated and allows the folder to go wild!

Features:

Osc1 / Osc2 Mix - Adjusts the mix between the Oscillator 1 and 2 inputs, also acts as an attenuator if only one input is used.
Timbre Control - Adjusts the overall amount of wave fold
Timbre CV - Bipolar (attenuator) controls the Timbre CV input
Symmetry - Adds an offset to the input so that the top half of the wave begins to fold earlier
Blend - Mixes between the clean and effected sound

Power consumption: 46mA at +12V and 48mA at -12V

Depth: 25mm

HP : 6

Notes: The Dannysound VU Meters is designed to be used with 2 x Dynamics modules. The modules connect internally via 2x3 pin ribbon cables. The meters provide a visual representation of various signals within the Dynamics modules making settings easier.

Features:

External input sockets for monitoring external sources.

Switch to select high or low meter sensitivity or off if the clicking needles get annoying!

Monitoring of the compression/expansion amount.

Monitoring of the unprocessed input level.

Monitoring of the compressor/expander output level.

Power consumption: 0.03mA at +12V and 83mA at -12V at and 3mA at +5V
Depth: 51mm
HP : 8

Notes: Welcome to the DROID X7 expander. The X7 gives you USB and MIDI connectivity for your master and also four gate outputs with modular levels.

You can process incoming and generate outgoing MIDI streams, both via classical DIN cables and via USB. Both the in and the out direction support polyphony with eight or even more voices in parallel.

For size reasons the X7 uses 3.5 mm TRS jacks for MIDI instead of the classical DIN jacks. But it comes with two DIN to TRS adapters, so you are free to use either form factor.

As a bonus feature, the X7 provides super fast loading of DROID patches via USB - without any need for putting the SD card in and out anymore.

Here are some examples of what you can do with the X7:

Attach an external keyboard to your modular.
Use an external hardware sequencer for playing melodies and beats in your modular.
Use an external MIDI controller to influence your DROID patch.
Do the same with a MIDI controller app on your tablet or phone (via USB).
Use your modular for playing polyphonic music and beats on your hardware synths or software synth plugins in your DAW, tablet or phone.
Connect two DROIDs (both with X7) and exchange real time CVs and triggers.
Use the four additional gate outputs on the X7 for sending clocks, gates and triggers and free your valuable CV outputs for other things.
Access the SD card in your master just like a USB stick for direct access to it via your PC, Mac, phone or tablet.
Alternatively load new patches to your master via MIDI sysex from your PC - and get your new patch ideas up and running in less than a second.

Dimensions
4 HP
23 mm deep

Current Draw
94 mA +12V
0 mA -12V
0 mA 5V

Notes: qTone is a module that precisely transforms any kind of voltages into musical notes. Take the LFO, a Random source, or the Sequencer outputs, send them through the quantizer to your oscillator or synth voice, and enjoy perfectly tuned melodies.

It has a bank of 16 user-defined scales that can be easily edited, and automatically saved into memory. qTone saves every change into EEPROM so you can be sure to get back to the last state after power on.

Both channels can work independently with their own scale each, or with a common scale as well. Aside from the Scale, it is possible to set Glide, Offset, and Transpose parameters. The Glide parameter performs a smooth portamento between quantized notes. Offset shifts an input CV up or down, which works as an offset before quantizing, while the Transpose parameter shifts a scale after quantizing by semitones.

The 2 CV inputs are freely routable to any parameter in the CV menu. qTone works with unipolar or bipolar signals, in the range from -5 to +5 volts.

Technical details

6 hp
45 mA +12V
22mA -12V
0 mA 5V
42 mm deep

CV input voltage ranges: +5-5v, 0v+5v
CV output voltage ranges: +5-5v, 0v+5v

Notes: A fully modular, Eurorack-format version of the excellent Dark Energy synth, the A-111-5 offers VCO, VCF, LFOs, VCA and envelope generator in a compact format. Brilliant value for a starter system.

Supplier's Notes:
Module A-111-5 is a complete monophonic synthesizer module that includes these components (modular version of Dark Energy):

VCO
Manual tune control (with an internal jumper the range can be set to ~ +/-1 half an octave or ~ +/-2.5 octaves)
Range switch -1 / 0 / +1 octave
Frequency range about 10Hz ... 12kHz - FM (frequency modulation) control with modulation source switch (LFO1 / off / ADSR)
Manual pulsewidth control for rectangle waveform
PWM control with modulation source switch (LFO2 / off / ADSR)
Waveform switch (sawtooth / off / triangle)
The sum of the waveform chosen by this switch and the rectangle is fed into the VCF (to turn the rectangle off the PW control has to be set fully CCW)
External CV input for VCO frequency (1V/octave)
External CV input for external PWM of the rectangle - internal CV input for frequency (1V/octave) connected to the A-100 bus via jumper, the jumper can be used to interrupt this internal connection if not wanted

VCF
24 dB low pass
~ 12 octaves frequency range
Manual frequency control
Tracking switch half - off - full (internally connected to the external frequency CV input of the VCO, i.e. the VCF tracks to the VCO if the switch is set to "half" or "full" position)
XM: exponential FM (frequency modulation) control with modulation source switch (LFO2 / off / ADSR)
LM: linear FM (frequency modulation) control to modulate the VCF by the triangle of the VCO in a linear (!) manner
Manual resonance control (up to self oscillation)
External audio input (this signal is added to the VCO signal)
External CV input for filter frequency - 1V/octave tracking for usage of the VCF as a sine wave oscillator (not as precise as the VCO but much better than most of the other filters)
VCA
Manual amplitude control
AM (amplitude modulation) control with modulation source switch (LFO1 / off / ADSR)
External CV input for VCA amplitude - special control scale: exponential scale in the range from about -20dB to -80/90dB, linear scale from about -20dB to 0dB (Remark: this special control scale results in a loudness behaviour that is a bit different from pure linear or exponential VCA)
LFO1 and LFO2
Manual frequency control
Waveform switch (triangle / off / rectangle)
Range switch (low, audio, medium) - LED display (dual green/red color for positive/negative share of the signal)
The inverted LFO1 signal is available as an additional socket (to use the LFO1 signal for external modules)
An internal jumper can be used to select between the LFO1 signal or the inverted LFO1 signal

ADSR
Manual controls for Attack, Decay, Sustain, Release
Range switch (long, short, medium) - blue LED display
ADSR signal is available as an additional socket (to use the ADSR signal for external modules)
Gate input connected to the A-100 bus via jumper, the jumper can be used to interrupt this internal connection if not wanted

Remarks:
As the LFO frequencies can go up to moderate audio range (~ 5kHz) even audio FM effects of VCO (pitch and pulsewidth), VCF and ADSR are possible.

If the VCO is turned off (waveform switch = center position, pulsewidth control = fully CCW) and the VCF resonance is set to maximum the module can be used as a sine oscillator. The sine can be modulated in a linear manner from the triangle wave of the VCO and by LFO2 in an exponential manner at the same time !

From the factory the socket labelled "LFO1" outputs the inverted LFO1 signal. But as the module has several internal pin headers available even another signal may appear at this socket by changing the internal module patch. These six pin headers are available: LFO1 output, LFO2 output, ADSR output, inverter input, inverter output, output socket. The internal default patch is LFO1 -> inverter input, inverter output -> output socket (i.e. socket = inverted LFO1). But even another signal can be patched to this socket (e.g. inverted ADSR, non-inverted LFO1, inverted or non-inverted LFO2). It is also possible to add a blind panel next to the A-111-5 with a couple of sockets that are connected to the corresponding pins of the A-111-5 pc board. The in- and outputs of the VCO, VCF and VCA are not available as pin headers because the VCO, VCF and VCA are internally connected in the circuit which is used in this module.

Notes: Module A-121s is a dual multimode filter which can be used for stereo applications as well as for parallel or serial organized dual mono filters. The core is a 12dB multimode filter identical to the modules A-121-2 and A-121-3. The selection of the filter type is continuously from lowpass via notch and highpass to bandpass. We attached great importance to the usability of the manual controls and CV inputs for both stereo and dual mono applications. For the filter parameters frequency (F), resonance (Q) and type (T) common controls and CV inputs as well as single controls and CV inputs are available. For the filter frequency in addition a manual control and CV input for the filter spread (frequency difference or delta F) is available.

Controls:
F: master frequency control for both filters (large knob)
Type 1 / Type 2: filter type panning/morphing L-N-H-B
Link to 1: Toggle switch so that Type 1 also controls type of filter 2 (i.e. simultaneous filter type control for both filters)
SFM1 / SFM2: Single Frequency Modulation controls (polarizers), connected to the corresponding sockets SFM1/SFM2 (socket SFM1 is normalled to a fixed positive voltage, SFM2 is normalled to SFM1, that way the controls SFM1/SFM2 work as frequency controls for each filter provided that no modulation signals are patched to the SFM1/SFM2 sockets)
CFM: common frequency control, controls two VC-polarizers which process the signals connected to the two sockets CFM1/CFM2, CFM2 is normalled to CFM1, that way also the same modulation signal (e.g. an envelope generator) can be used for both filters and the level controlled simultaneously by the CFM control
Delta F: controls the difference between the frequencies of the two filters manually (frequency "spread"), at centre position the frequencies are the same
Delta FM: controls the level of the Delta FM signal (socket), which allows to control the spread between the frequencies also by an external control voltage (e.g. by an LFO or ADSR)
Q: controls the resonance of both filters simultaneously
Level 1 / Level 2: attenuators for the two audio inputs
QM/TM1, QM/TM2: attenuators for the modulation inputs QM/TM1 and QM/TM2

Sockets:
In1 / In2: audio inputs (In2 is normalled to In1)
Out1 / Out2: audio outputs
F: common frequency control input for both filters (~ 1V/oct)
Delta FM: Control voltage for frequency spread, processed by the polarizer Delta FM
SFM1 / SFM2: single frequency modulation inputs, processed by the polarizers SFM1 and SFM2, SFM1 is normalled to a fixed positive voltage, SFM2 is normalled to SFM1#
CFM1 / CFM2: common frequency modulation inputs, processed by the two voltage controlled polarizers controlled by CFM knob, CFM2 is normalled to CFM1
QM/TM1, QM/TM2: the addressing of these sockets/attenuators is defined by internal jumpers. QM means Q modulation (i.e. resonance modulation), TM means filter type modulation (QM1 = resonance modulation filter 1, QM2 = resonance modulation filter 2, TM1 = filter type modulation filter 1, TM2 = filter type modulation filter 2), socket QM/TM1 is normalled to a fixed positive voltage, QM/TM2 is normalled to QM/TM1
A 45 degrees triangle next to a socket means that the switching contact of the socket is normalled to a fixed positive voltage (SFM1, QM/TM1).
A vertical triangle indicates the normalling of two sockets (In1>In2, SFM1>SFM2, CFM1>CFM2, QM/TM1>QM/TM2).

If the filters do not behave as expected please pay attention to these peculiarities:

For the controls SFM1, SFM2, CFM, Delta F and Delta FM the centre position is the neutral position as these are polarizers. If the filter behaves unexpected these controls should be set to centre positions for the time being.

For the controls F, Q, Level 1, Level 2, QM/TM1 und QM/TM2 the fully CCW position is the neutral position as these are standard attenuators. If the filter behaves unexpected at least the controls QM/TM1 and QM/TM2 should be set to fully CCW. Via the normalling of the sockets QM/TM1 and QM/TM2 and the associated controls the filter parameters adjusted by the major controls (e.g. Type 1, Type 2 or Q) may be overwritten.

By means of small circles at the bottom right side of the front panel the user can mark the function of the QM/TM inputs. These assignments are possible:

QM/TM1 controls QM1, QM/TM2 controls QM2, the filter types are not controlled by external CVs
QM/TM1 controls TM1, QM/TM2 controls TM2, the resonances are not controlled by external CVs
QM/TM1 controls QM1 and QM2 simultaneously, QM/TM2 controls TM1 and TM2 simultaneously

Depth: 45mm
HP : 12

Notes: Module A-121s is a dual multimode filter which can be used for stereo applications as well as for parallel or serial organized dual mono filters. The core is a 12dB multimode filter identical to the modules A-121-2 and A-121-3. The selection of the filter type is continuously from lowpass via notch and highpass to bandpass. We attached great importance to the usability of the manual controls and CV inputs for both stereo and dual mono applications. For the filter parameters frequency (F), resonance (Q) and type (T) common controls and CV inputs as well as single controls and CV inputs are available. For the filter frequency in addition a manual control and CV input for the filter spread (frequency difference or delta F) is available.

Controls:
F: master frequency control for both filters (large knob)
Type 1 / Type 2: filter type panning/morphing L-N-H-B
Link to 1: Toggle switch so that Type 1 also controls type of filter 2 (i.e. simultaneous filter type control for both filters)
SFM1 / SFM2: Single Frequency Modulation controls (polarizers), connected to the corresponding sockets SFM1/SFM2 (socket SFM1 is normalled to a fixed positive voltage, SFM2 is normalled to SFM1, that way the controls SFM1/SFM2 work as frequency controls for each filter provided that no modulation signals are patched to the SFM1/SFM2 sockets)
CFM: common frequency control, controls two VC-polarizers which process the signals connected to the two sockets CFM1/CFM2, CFM2 is normalled to CFM1, that way also the same modulation signal (e.g. an envelope generator) can be used for both filters and the level controlled simultaneously by the CFM control
Delta F: controls the difference between the frequencies of the two filters manually (frequency "spread"), at centre position the frequencies are the same
Delta FM: controls the level of the Delta FM signal (socket), which allows to control the spread between the frequencies also by an external control voltage (e.g. by an LFO or ADSR)
Q: controls the resonance of both filters simultaneously
Level 1 / Level 2: attenuators for the two audio inputs
QM/TM1, QM/TM2: attenuators for the modulation inputs QM/TM1 and QM/TM2

Sockets:
In1 / In2: audio inputs (In2 is normalled to In1)
Out1 / Out2: audio outputs
F: common frequency control input for both filters (~ 1V/oct)
Delta FM: Control voltage for frequency spread, processed by the polarizer Delta FM
SFM1 / SFM2: single frequency modulation inputs, processed by the polarizers SFM1 and SFM2, SFM1 is normalled to a fixed positive voltage, SFM2 is normalled to SFM1#
CFM1 / CFM2: common frequency modulation inputs, processed by the two voltage controlled polarizers controlled by CFM knob, CFM2 is normalled to CFM1
QM/TM1, QM/TM2: the addressing of these sockets/attenuators is defined by internal jumpers. QM means Q modulation (i.e. resonance modulation), TM means filter type modulation (QM1 = resonance modulation filter 1, QM2 = resonance modulation filter 2, TM1 = filter type modulation filter 1, TM2 = filter type modulation filter 2), socket QM/TM1 is normalled to a fixed positive voltage, QM/TM2 is normalled to QM/TM1
A 45 degrees triangle next to a socket means that the switching contact of the socket is normalled to a fixed positive voltage (SFM1, QM/TM1).
A vertical triangle indicates the normalling of two sockets (In1>In2, SFM1>SFM2, CFM1>CFM2, QM/TM1>QM/TM2).

If the filters do not behave as expected please pay attention to these peculiarities:

For the controls SFM1, SFM2, CFM, Delta F and Delta FM the centre position is the neutral position as these are polarizers. If the filter behaves unexpected these controls should be set to centre positions for the time being.

For the controls F, Q, Level 1, Level 2, QM/TM1 und QM/TM2 the fully CCW position is the neutral position as these are standard attenuators. If the filter behaves unexpected at least the controls QM/TM1 and QM/TM2 should be set to fully CCW. Via the normalling of the sockets QM/TM1 and QM/TM2 and the associated controls the filter parameters adjusted by the major controls (e.g. Type 1, Type 2 or Q) may be overwritten.

By means of small circles at the bottom right side of the front panel the user can mark the function of the QM/TM inputs. These assignments are possible:
QM/TM1 controls QM1, QM/TM2 controls QM2, the filter types are not controlled by external CVs
QM/TM1 controls TM1, QM/TM2 controls TM2, the resonances are not controlled by external CVs
QM/TM1 controls QM1 and QM2 simultaneously, QM/TM2 controls TM1 and TM2 simultaneously

Notes: ***B-STOCK: Box opened, but product is in excellent condition and in perfect working order***


Module A-121s is a dual multimode filter which can be used for stereo applications as well as for parallel or serial organized dual mono filters. The core is a 12dB multimode filter identical to the modules A-121-2 and A-121-3. The selection of the filter type is continuously from lowpass via notch and highpass to bandpass. We attached great importance to the usability of the manual controls and CV inputs for both stereo and dual mono applications. For the filter parameters frequency (F), resonance (Q) and type (T) common controls and CV inputs as well as single controls and CV inputs are available. For the filter frequency in addition a manual control and CV input for the filter spread (frequency difference or delta F) is available.

Controls:
F: master frequency control for both filters (large knob)
Type 1 / Type 2: filter type panning/morphing L-N-H-B
Link to 1: Toggle switch so that Type 1 also controls type of filter 2 (i.e. simultaneous filter type control for both filters)
SFM1 / SFM2: Single Frequency Modulation controls (polarizers), connected to the corresponding sockets SFM1/SFM2 (socket SFM1 is normalled to a fixed positive voltage, SFM2 is normalled to SFM1, that way the controls SFM1/SFM2 work as frequency controls for each filter provided that no modulation signals are patched to the SFM1/SFM2 sockets)
CFM: common frequency control, controls two VC-polarizers which process the signals connected to the two sockets CFM1/CFM2, CFM2 is normalled to CFM1, that way also the same modulation signal (e.g. an envelope generator) can be used for both filters and the level controlled simultaneously by the CFM control
Delta F: controls the difference between the frequencies of the two filters manually (frequency "spread"), at centre position the frequencies are the same
Delta FM: controls the level of the Delta FM signal (socket), which allows to control the spread between the frequencies also by an external control voltage (e.g. by an LFO or ADSR)
Q: controls the resonance of both filters simultaneously
Level 1 / Level 2: attenuators for the two audio inputs
QM/TM1, QM/TM2: attenuators for the modulation inputs QM/TM1 and QM/TM2

Sockets:
In1 / In2: audio inputs (In2 is normalled to In1)
Out1 / Out2: audio outputs
F: common frequency control input for both filters (~ 1V/oct)
Delta FM: Control voltage for frequency spread, processed by the polarizer Delta FM
SFM1 / SFM2: single frequency modulation inputs, processed by the polarizers SFM1 and SFM2, SFM1 is normalled to a fixed positive voltage, SFM2 is normalled to SFM1#
CFM1 / CFM2: common frequency modulation inputs, processed by the two voltage controlled polarizers controlled by CFM knob, CFM2 is normalled to CFM1
QM/TM1, QM/TM2: the addressing of these sockets/attenuators is defined by internal jumpers. QM means Q modulation (i.e. resonance modulation), TM means filter type modulation (QM1 = resonance modulation filter 1, QM2 = resonance modulation filter 2, TM1 = filter type modulation filter 1, TM2 = filter type modulation filter 2), socket QM/TM1 is normalled to a fixed positive voltage, QM/TM2 is normalled to QM/TM1
A 45 degrees triangle next to a socket means that the switching contact of the socket is normalled to a fixed positive voltage (SFM1, QM/TM1).
A vertical triangle indicates the normalling of two sockets (In1>In2, SFM1>SFM2, CFM1>CFM2, QM/TM1>QM/TM2).

If the filters do not behave as expected please pay attention to these peculiarities:

For the controls SFM1, SFM2, CFM, Delta F and Delta FM the centre position is the neutral position as these are polarizers. If the filter behaves unexpected these controls should be set to centre positions for the time being.

For the controls F, Q, Level 1, Level 2, QM/TM1 und QM/TM2 the fully CCW position is the neutral position as these are standard attenuators. If the filter behaves unexpected at least the controls QM/TM1 and QM/TM2 should be set to fully CCW. Via the normalling of the sockets QM/TM1 and QM/TM2 and the associated controls the filter parameters adjusted by the major controls (e.g. Type 1, Type 2 or Q) may be overwritten.

By means of small circles at the bottom right side of the front panel the user can mark the function of the QM/TM inputs. These assignments are possible:
QM/TM1 controls QM1, QM/TM2 controls QM2, the filter types are not controlled by external CVs
QM/TM1 controls TM1, QM/TM2 controls TM2, the resonances are not controlled by external CVs
QM/TM1 controls QM1 and QM2 simultaneously, QM/TM2 controls TM1 and TM2 simultaneously

Notes: ***B-STOCK: Box opened, but product is in excellent condition and in perfect working order***

Simple to look at but deceptively powerful, Dreadbox's Telepathy is a full analogue synth in a small module, featuring VCO, low-pass and high-pass filters, LFO, envelopes and VCA.

Supplier's Notes:
Telepathy is a full voice analogue synthesizer module with deep modulation options due to its multi-destination LFO and Envelope. From Bass to Lead sounds, to drums and drones, Telepathy has broad and versatile sound design capabilities. It has a Full Analogue path (Typhon VCO, 4-pole low pass / 2-pole high pass filters, analogue VCA) that is digitally controlled for more precision over its parameters, resulting in a warm, present and distinct Dreadbox sound.

With lots of useful and musical features integrated into a compact size (10hp), and its skiff friendly design, Telepathy is a great addition to small or large Eurorack systems.

Features:

1x Analogue Oscillator with saw, square, -1 oct square sub and noise, plus PW control for square, level for noise and waveshape
Automatic tuning for the oscillator and fine tune
Analogue 24db Resonant Low pass filter with Oscillator FM and Noise FM and 6db High pass filter
Analogue VCA
1x LFO with Free/Key/Track/BPM/BPM Key modes, Fade in, Triangle/Saw/Ramp/Square/Random waveforms, that is mapped to various parameters
2x Envelopes, one dedicated to the VCA with Velocity control and one loopable for Low pass Filter, Pitch and PW
CV in patch that can be mapped to all the basic parameters in parallel with dedicated amount for each parameter
MIDI in/out+through
CC in/out, Program Change in/out
Multitimbral Chaining functionality via MIDI up to 8 modules 16 presets
10HP

Notes: dsp.cpoffee's custom everything-including-kitchen-sink dsp development platform.

At the core of this is an Electrosmith Daisy Patch Submodule, combined with a 12-bit 4 channel SPI DAC [DAC7554], and supporting hardware for more IO

Features
- 8x pots normalled to +5V
- 8x CV in breaks normalled connection and pot acts as an attenuator
- 2x gate in
- 2x gate out
- High-fidelity stereo in/out (Daisy Patch Submodule, using an WM8731 codec)
- 2x 12-bit CV out from Daisy Patch Submodule, scaled to -5v to 10v
- 4x 12-bit CV (or lofi audio w/ some hacking) from external DAC7554, scaled to -7v to 7v
- TRS MIDI in/out (in is auto-sensing for type a/b)
- SD card slot
- Expansion header for +5v, +3v3, SPI, UART, I2C, and USB connections

Notes: The Wave Transformer is a complex single oscillator with 7 audio outputs. Its method of wave shaping differs from other complex oscillators in that it is not based upon classic wave folding such as is common in West Coast synthesis, or filtration such as is common in East Coast synthesis.

This analogue, vintage-voiced, voltage-controlled oscillator features over 8 octaves of accurate pitch tracking. Its 7 simultaneous wave outputs include a unique Complex output. This strange and novel output varies between a simple waveform (triangle, unless you patch a signal into the Shape Insert jack) and a complex transformation of the harmonic structure of the original waveform. It contains a unique mixture of the fundamental frequency, odd order harmonics, even order harmonics and subharmonics. The Sub Octave panel control will determine whether the sub harmonics are derived from one octave down, two octaves down, or are muted altogether. It will vary from a simple waveform to a silhouette of your cat watching you as you react to a "present" that it left for you on the counter. No, seriously.

The module's Transform control morphs from a basic waveform through many strange iterations into a complex, gnarled mass of audio mutations at the Complex output using an asymmetrical multi differential audio transmutation circuit. You can yield countless variations on these permutations by combining this novel circuit with Hard Sync, Soft Sync, Linear FM and Exponential FM.

Additionally, you can mute the source waveform to use the circuit as a harmonic gate/VCA, rendering the Wave Transformer a voice unto itself.

If that is not enough, there is a Shape Insert that allows you to transform external oscillations and modular-level audio sources.

Notes: Erica Synths Bassline is fully analogue synth voice module for ultimate basslines and leads.

It features AS3340 VCO with three waveforms, a filter inspired by Erica Synths Acidbox and unique features - transistor based suboscillator and two BBD lines that emulate VCO detune creating a sound of massive polysynth from one oscillator.

Accent provides more expression to the bassline, by adding volume and opening the VCF slightly.

Notes: Erica Synths Black Hole DSP 2, an updated version of Black Hole DSP features 24 custom effects, designed in close co-operation of Erica Synths team rider KODEK and creator of SpinCAD software Gary Worsham. Each effect has 3 manually and CV controllable parameters, manual and CV control over sampling frequency for spanning from 48kHz to really Lo-Fi crunchy sound and full analogue dry/wet control. All effect parameter settings can be saved to the memory and instantly recalled with the effect, which makes Black Hole DSP II ideal for live performances.

Notes: Erica Black OCTASOURCE is, what we want to believe, the LFO carried to it's extremes. It features one of 8 waveforms available on 8 outputs phase shifted by 45 degrees OR all 8 waveforms simultaneously on all outputs. Futuremore, waveform selection, phase shift and LFO rate are CV controlled, and the rate can be synched to an external clock signal.

Erica Black series are high-end modules with unique functionality. Only the highest quality components are used and all inputs and outputs are protected against undesired overvoltage. When designing the Black Series, design and usability was prioritsed over module width. Big knobs are assigned to functions that make difference in sound. The Erica Black series are a range of modules that together make an entire synthesizer.

LFO rate: 0.03Hz- 30HZ
Output signal amplitude: 10Vptp
CV input (full sweep): -5V- +5V
Power consumption: +82mA, -44mA
Module width: 12HP

82 mA +12V
44 mA -12V
25 mm deep

Notes: Erica Synths Black Output is a high-quality output mixer and a stereo panner with balanced outputs and headphone amplifier for monitoring your modular masterpieces.

All inputs are buffered, we use stereo potentiometers (similar to those used in high quality studio mixers) for panning, IN4 is a stereo input with simultaneous level adjustment for both channels, IN3 has a CV controlled auto-pan function. There is also a 6.3mm jack for the balanced outputs and headphones.

Notes: Erica Synths Black Quad VCA2 is a versatile four channel voltage controlled amplifier and mixer module for use in complex modular systems. Each channel has linear/logarithmic response selector and signal level indicator LED. All outputs are sequentially mixed and CV inputs are normalled to each other, so you can use the module in various configurations. If no CV is applied, the Black Quad VCA2 performs as a signal mixer, and the 4th channel is DC coupled for controlling CV sources, as well.

Notes: Erica Synths Black Spring Reverb is a different take on spring reverberation units. Firstly, it has built in vactrol based audio compressor, secondly, it can operate an external tank and combination of both internal and external ones for effects unheard before, thirdly, in order to animate reverb effect, the module has built-in feedback effects - pitch shifters, delay, ring-modulator, etc; feedback amount and effect parameters can be controlled manually and via CV, making the module an experimental instrument on its own. Module comes with compact spring reverberation tank which can be easily installed in most eurorack cases.

Features
Compact spring reverberation tank to install in a skiff case
Manually and CV controlled feedback amount
Vactrol-based compressor
7 distinct feedback effects
Selection between internal, external reverberation tanks or combination of both
Feedback Send and Return jack sockets
The module is designed to be used with wide variety of spring tanks, but the best results will be using tanks with low input impendance - 8-200ohm

Technical specifications:
Audio input level -5V - +5V
CV level (full span) -5V - +5V
Power consumption 43mA, -71mA
Module width 12HP
Module depth 30mm
Internal reverb tank dimensions 190mmx67mmx24mm (30mm with spacers)

Notes: The Erica Synths Black Stereo Delay is a hi-fi stereo delay with a lot of unique features based on our custom DSP engine. Tape, BBD and digital delay emulations with three modes, each accompanied with delay time, feedback, feedback tone and stereo spread controls allow for designing extremely delicate effects. CV control over various parameters and the ability to save up to 10 presets will make this module an integral part of any performance rack. Delay effects are developed by Dutch company www.112db.com

Features

Tape, BBD and digital delay types
Three modes for each type
Tap and clock synchronization of delay time
10 preset patches
CV control over delay time, feedback, tone, dry/wet mix and preset selection
Adjustable stereo delay spread
The modules run on new Erica Synths DSP hardware and the effects are developed in collaboration with Dutch company 112.dB who make some of the most beautiful sounding effects.

Erica Black Series include high-end, unique functionality and superior quality modules. Only the best, highest-quality components are used, all inputs and outputs are protected against undesired overvoltage. Erica Black Series consist of range of modules that are needed to put together entire synth.

Technical specifications:

Max audio input level before clipping: 16Vptp
CV input range (full span): -5V - +5V
Sampling frequency: 48kHz, 24bit
Delay time: 3..3000ms
Audio codecs: -108 dynamic range, -98dB THD+N
Power consumption: 120mA@+12V, 39mA@-12V
Module width: 12HP
Module depth: 35mm

Notes: The Erica Synths Black Reverb is a versatile hi-fi stereo FX module with lots of unique features based on Erica Synths' custom DSP engine. The reverb sources are selectable Tape, BBD and "dirty BBD" digital; emulations with three modes, each - Room, Hall and Cathedral. Delicate room size control, feedback, feedback tone and stereo spin controls allow for designing extremely delicate reverberation effects. CV control over various parameters and the ability to save up to 10 presets will make this module an integral part of any performance rack.

Features:

Reverb based on Tape, BBD and digital delay lines
Three room sizes
Manual and triggered FREEZE with 1V/oct tracking
10 preset patches
CV control over size, feedback, tone, dry/wet mix and preset selection
Adjustable stereo spin

Specs:

Max audio input level before clipping 16Vptp
CV input range (full span) -5V - +5V
Sampling frequency 48kHz, 24bit
Audio codecs -108 dynamic range, -98dB THD+N
Power consumption 120mA@+12V, 39mA@-12V
Module width 12HP
Module depth 35mm

Notes: To add some space to your compositions and nuances in sound design Erica Synths Dual FX module brings you two identical sections of 8 custom effects with two adjustable and CV controllable parameters.
Dual FX combines two Spin FV-1 chips in one module, each filled with eight custom effect programs with two adjustable and CV controlled parameters per effect and analogue dry/wet circuit. All parameter settings can be saved with the effect and recalled instantly during the performance. Also the output of the first FX section is normalised to the second input so creating huge layers of effects is easy.

FX:

Mono delay
Stereo delay
Hi-pass delay
Big reverb
Saturated reverb
Stalker reverb
Ripper
Dual pitch shifter

Technical specs:

Audio output level: -5...+5V
CV level (full span): -5...+5V
Power consumption: 118mA@+12V, 61mA@-12V
Module width: 10HP
Module depth: 45mm

Notes: Part of Erica's brilliant valve-based Fusion range, this is not your typical VCA. Waveshaping and ring modulation are the key features here, twisting and warping signals to great effect.

Supplier's Notes:

The Fusion VCA/Waveshaper/Ringmodulator is a complex sound processor that combines VCA, waveshaper and ringmodulator. It's not a regular VCA; it can operate as one, but most of the power of the module is in advanced modulations - with two CVs applied simultaneously to different stages of the VCA, audio rate modulations, using ringmodulator as a waveshaper - your imagination is the limit!

Low power consumption due to miniature vacuum tubes.

Technical specifications:

Audio Input level: 10Vptp
CV input level (full swing): -10V - +10V
Panel width: 14HP
Module depth: 36mm
Power consumption: 48mA@+12V, 69mA@-12V

Notes: Better known for analogue modules, it turns out Erica Synths are pretty damn good at digital too. Draw your own waveforms, build wavetables, tweak in real time and get freaky. Killer VCO.

Supplier's notes:
Erica Synths Graphic VCO allows you to draw your own waveforms, arrange them in wavetables and wavetable banks, morph between two selected waves and alter the resulting wave in advanced ways (FXes) - apply FM, phase distortion, ring modulation, wavefold/wavewrap, bitcrush.

Waves, wavetables, FXes and other settings can be saved and recalled from the memory instantly. The module has two outputs - the main output and the output with configurable suboscillator.

NB! To have the module functionality up to date, we recommend you to check the Erica Synths home pageor our social media from time to timefor announcements about firmware updates for the Graphic VCO. You can update the firmware of the module via miniUSB cable. More detailed instructions of the firmware update can be found in the User Manual.

The sound is clean, modern, punchy and detailed thanks to the unit running at 96kHz - quite different to some low bit-rate wavetable oscillators on the market. Wavetable interpolation is smooth as butter and with the built-in effects you can dirty things up in many different ways. The module scores highly on the sound front. The Graphic VCO is a very capable oscillator module with excellent sound quality and a lot of features that could make it the right choice, especially if live performance is your thing. - Sound On Sound
The bottom line is that the Graphic VCO is a joy to use. It's a module that's unashamedly digital, yet unmistakably eurorack. I think Erica showed a great deal of careful judgement and restraint in the design of this module. It would have been easy to have made it bloated and cumbersome trying to cram as many features as possible into it, but they kept it fairly simple which keeps the module fun and immediate in use. It's capable of a huge tonal palette ranging from beautiful to brutal that is bound to fit in with a lot of different styles and systems. - Ask Audio
The ability to draw and then effortlessly jump between different custom digital waveforms in this way feels unique on the Eurorack stage, and allows for a wide range of tones and transitions between them. - Orb Mag

Technical specifications:

Audio output amplitude
10Vptp
Octave range
C0-C8
Sample rate
96kHz
Unipolar CV input range
0 -+10V
Bipolar CV input range
-10V -+10V
Panel Width
16 HP
Module depth
30mm
Power consumption
152mA@+12V,
20mA@-12V

Notes: Erica Synths Modulator is an advanced modulation and pitched noise source with focus on rhythmic (but not limited to) compositions in mind. It features two identical syncable to the BPM LFOs/noise sources with selectable morphing waveshapes. LFO frequency can be manually adjustable, as well as they provide frequency divisions and multiplication in Sync mode. Each LFO has two outputs- main one and secondary one with adjustable phase, so you can create evolving modulations. Furthermore, LFOs can be linked to work at the same frequency and the first LFO has built in VCA to control output signal amplitude.

Features
Two independent modulation/pitched noise sources
7morphing waveshape + noise
LFO Sync, frequency divisions and multiplications
Integrated VCA for first modulation source
Two main outputs
Two outputs with an adjustable phase shift
LP and HP filter on outputs in pitched noise mode
CV control over LF rate/noise pitch

Output level: -5...+5V
CV level (full span): -5V - +5V
Power consumption: 86mA@ + 12V, 7mA@ - 12V
Module width: 10HP
Module depth: 45mm

Notes: MIX KM (like Feedback's PRE KM channel strip) is based on a famous late seventies small mixer used by many electronic music bands.

Tech specs:

- 35HP front panel
- 35mm depth behind front panel including the power connector
- 6 mono input jacks ( 1 per channel)
- Pot controls for channels : Gain, Hi, Low, Aux1 send, Aux2 send, Pan, Volume
- 6 mute switches (1 per channel)
- Pot controls for master : Master Level, Headphone Level, Aux1 Return, Aux2 Return
- 2 x mono aux send jacks
- 4 mono input jacks for two stereo Aux returns
- 2 jacks for master left and right out
- one 3.5mm stereo jack for headphone out
- boxed 10 pin euro power (+12V / -12V)

Notes: The VCZIII voltage controlled oscillator modules are Feedback's latest creation and are based on the VCOs of one of the most revered analogue instruments, the famous British pin matrix synth released in 1969.

The VCZIII series VCO is a result of the collaboration of Feedback modules and CMS-LAB and is a modern re-creation of those temperamental, organic and beautiful sounding VCOs from 1969 but with enhancements and adaptations to the Eurorack needs of 21st century.

There are two type of VCOs, VCZIII A based on VCO1 with variable shape SINE & SAW waveforms, VCZIII B based on VCO2 & VCO3 with variable TRIANGLE & PULSE waveforms.

Also, each VCO comes in two versions, one with normal fine tune potentiometers and one with precision multiturn potentiometer.

THIS VERSION IS WITH BOURNS MULTITURN FINE TUNE POTENTIOMETER.

Tech specs:

- 12HP width
- 35mm depth behind front panel including the power connector
- standard 10 pin euro power +12V / -12V
- power consumption +12V 50mA , -12V 30mA

Notes: The VCZIII voltage controlled oscillator modules are our latest creation and are based on the VCOs of one of the most revered analogue instruments, the famous British pin matrix synth released in 1969.

The VCZIII series VCO is a result of the collaboration of Feedback modules and CMS-LAB and is a modern re-creation of those temperamental, organic and beautiful sounding VCOs from 1969 but with enhancements and adaptations to the Eurorack needs of 21st century.

There are two type of VCOs, VCZIII A based on VCO1 with variable shape SINE & SAW waveforms, VCZIII B based on VCO2 & VCO3 with variable TRIANGLE & PULSE waveforms.

Also, each VCO comes in two versions, one with normal fine tune potentiometers and one with precision multiturn potentiometer.

THIS VERSION IS WITH BOURNS MULTITURN FINE TUNE POTENTIOMETER.

Tech specs:

- 12HP width
- 35mm depth behind front panel including the power connector
- standard 10 pin euro power +12V / -12V
- power consumption +12V 50mA , -12V 30mA

Notes: Designed for Frap's CGM Creative Mixer modules, the Masterone takes an input via IDC socket rather than standard Eurorack connections, then feeds out to headphone outs, balanced stereo XLR, TRS and mono.

Supplier's Notes:
The Masterone is the first Frap Tools module designed to be connected exclusively with non-Eurorack equipment.

It features four separate output sections with different Neutrik connectors and adjustable gain levels to suit the most common live and studio situations (and even some uncommon ones).

With no inputs and just large-format outputs, it pushes even further the concept behind the M module: being a Eurorack system's gateway to the outside world.

XLR Balanced Stereo Outputs

Two XLR connectors (left and right) provide a balanced output with the expected 6 dB extra gain. In many cases, they can allow bypassing a DI box.

TRS Pseudo-Balanced Stereo Outputs

These outputs are very similar in concepts to the ones on the M module, but with large 1/4" jack connectors. It is possible to patch standard TS cables and use them as unbalanced outputs, or use TRS cables to interface them with balanced equipment (the ground is routed to both the ring and the sleeve, for a better performance than regular unbalanced outputs).

Attenuation Switches for Flexible Connectivity

If the two stereo outputs are too hot, a set of switches can attenuate them. The Line/Mic switch on the XLR outputs attenuates them by ~30 dB, while the Line/Inst switch on the TRS outputs attenuates them by ~15 dB.

Stereo Headphones Output with Pre-Fader Listening

The Headphones section allows you to monitor the Master output with an independent volume knob and, at the same time, take advantage of the PFL function on the Channels and the Groups. Rotate the PFL crossfader towards the blue section to blend the PFL modules with the Master sum and check if everything is okay before launching the next scene.

Mono Output with Dedicated Fader

Should you need an extra monitor on stage, or run the whole system through a vintage amp in the studio for parallel processing, the auxiliary monophonic outputs is the answer. It provides the sum of both channels in a handy, pseudo-balanced output with a dedicated fader: attenuate the line level by 15 dB, or amplify it by 6 dB.

12-LED VU Meter with Memory

A detailed VU Meter monitors the signal amplitude from -40 to +15 dB with peak memory on the upper LEDs.

Dimensions:

12HP

38 mm deep

85 mA +12V - 80 mA -12V

with headphones at high level (250O)

110 mA +12V 105 mA -12V

Notes: Advanced generative sequencer featuring mutes per channel and transposition facilities.

Akropoli is an extension and enhancement of our successful Little Melody and High Towers modules, offering the features of both of these modules as well as some of it's own unique features such as mute buttons per channel, manual transpose knob and 1V/oct transpose CV input. Akropoli operates using Frequency Central's proprietary TOOL V2 code, and can count in integers as well as multiples for even more subtle and evolving variations.

Akropoli is a generative sequencer based around clock divisions and a chromatic quantiser, used to create in-the-moment licks and riffs. It is more that the sum of it's parts.

Akropoli's internal operations can be considered as 4 clock dividers patched into a CV mixer via attenuators. The attenuators select notes over a 5 octave range, the clock dividers determine how often those notes are added to the mix. The final output of Akropoli is quantized chromatically for fast set up and continuously pleasing results. Akropoli has an onboard transposition knob, as well as a 1V/oct transposition CV input.

The 4 clock dividers are labelled A, B, C, and D. They all receive clocks from the same source, the divisions may be selected using the presets and the individual division selectors. The clock dividers can be set to count up, down, or to one of a variety of modes that move between counting up and down. For further information on Presets and Modes see the Little Melody User Guide.

Additionally, each clock divider has it's own binary output (either high or low), these 4 outputs can be used to clock/gate/trigger other stuff on other modules to great effect.

Product Specifications

12V draw
50mA

-12V draw
36mA

5V draw
0mA

Depth
35mm

Notes: A couple of years back, Frequency Central developed Cosmic Background as a standalone percussion voice. The concept was to bundle all required sub-modules behind one panel, pre-patched, yet also fully modular, with each sub-module having its own inputs and outputs. This proved to be a very popular product, but Frequency Central decided to replace Cosmic Background's noise generator with a VCO (and do a few other tweaks), creating a cute little fully modular synth voice ripe for sequencing - and that's how Dark Star was born!

Dark Star consists of 4 sections:

Voltage Controlled Oscillator based on AS3340 with sawtooth, triangle and pulse waveforms
Voltage Controlled Filter with lowpass and highpass options, Drive control, Sweep control which attenuates amount of Release CV
Release generator with CV input for voltage control of release time. Option for sustain via jumper on rear panel.
Voltage Controlled Amplifier
Together they form a pre-patched super versatile analogue synthesiser voice.

Additionally, each section is fully modular in it's own right, so there are patch points for:

1V/oct CV input
PWM CV input - attenuator doubles as manual pulse width when no external signal is present
Gate input for Release or Sustain/Release
Release CV input for voltage control of Release time
VCF audio input with attenuator, for introducing external audio
VCF CV input with attenuator (1V/oct CV is normalised to this input)
VCA audio input (VCF is normalised to this input)
VCA CV input (Release CV is normalised to this input)
Release CV output
VCO audio output
VCF audio output
VCA audio output

Here are some useful patches to try:

Release CV output to PWM CV input, for swept PWM
VCF OUT to VCF IN, thickens and further overdrives the filtering
VCO OUT to VCF CV input, for fizzy FM of the filter
Use a multiple to patch 1V/oct to Release CV input, lower notes will have longer release, higher notes will have shorter release

Product Specifications

12V draw: 28mA
5V draw: 0mA
-12V draw: 28mA

Depth: 35mm
Width: 16HP

Notes: Looking Glass is an 5 x 5 active patchbay/matrix mixer/switcher for both audio and control voltages. It features:

5 inputs (1 through to 5), each with attenuators
5 inverted outputs (A through to E) which are 180o out of phase with the inputs
5 normal outputs (A through to E) which are in phase with the inputs
A switch matrix of 25 push on/push off switches and LED status indicators
Any of the 5 inputs can be patched to any of the 5 outputs simply by pressing the corresponding switches. A patched signal will appear at both normal and inverted outputs simultaneously.

A single input can be patched to a single output. A single input can be patched to multiple outputs. Multiple inputs can be patched to a single output. Multiple inputs can be patched to multiple outputs.

The attenuators allow you to reduce the volume of an incoming signal. If you add many inputs to one output you will of course cause clipping (which may or may not be desirable!), the attenuators are your on-board way around this.

Specifications:

12V draw: 30mA
5V draw: 0mA
-12V draw: 31mA
Depth: 35mm
Width: 18HP

Notes: Expandable 4 channel VCA based stereo mixer with tone shaping and FX bus.

Chipset:

For this item, Frequency Central offer a CHIPSET which contains the following:

3 x LM13700

For all other components required, please see the build document.

Features:

4 x input channels, each featuring LEVEL, HIGH, LOW, FX send, PAN, MUTE and CV control of level.
FX send and stereo return + FX phase jumper
Left and Right Eurorack level inputs (2 x 3.5mm sockets)
Left and Right line level outputs (2 x 6.35mm sockets)
Scribble strips!

Strips is also expandable! You can add a second strips, connected to the first via a 16 pin to 16 pin cable. The cable powers the second Strips and gives you 8 channels to play with. The second Strips accesses the first Strips FX bus. When using in expanded configuration, the FX send/return and main outputs for the second Strips are not available. Here's how!

FX phase jumper - because not all FX that you might use in the FX loop are in phase with respect to their input/output. The phase jumper allows you to compensate for this and avoid weird phase cancellations.

Product Specifications

12V draw: - 43mA
5V draw: - 0mA
-12V draw: 43mA
Depth: 39mm

Notes: Wonderland is an 8×8 active patchbay/matrix mixer/switcher for both audio and control voltages. It features:

8 inputs (1 through to 8), each with micro-attenuators (which can be set with a small screwdriver)
8 buffered inverted outputs (A through to H) which are 180o out of phase with the inputs
8 buffered normal outputs (A through to H) which are in phase with the inputs
A switch matrix of 64 push on/push off switches
Any of the 8 inputs can be patched to any of the 8 outputs simply by pressing the corresponding switches. A patched signal will appear at both normal and inverted outputs simultaneously.

A single input can be patched to a single output. A single input can be patched to multiple outputs. Multiple inputs can be patched to a single output. Multiple inputs can be patched to multiple outputs.

Each input features a micro-attenuator which can be set with a small screwdriver. This space saving feature allows you to reduce the volume of an incoming signal without having to resort to external attenuators. If you add many inputs to one output you will of course cause clipping (which may or may not be desirable!), the micro-attenuators are your on-board way around this. I find it useful to leave the micro-attenuators set to 50% (which is how they come pre-set at delivery). Of course, their size is a little bit of a compromise, but they are a useful feature nonetheless. Wonderland’s sister module Looking Glass includes full size input attenuators as well as LED status indicators.

Product Specifications
12V draw
30mA

5V draw
0mA

-12V draw
31mA

Depth
35mm

Width
18HP

Notes: Upgraded Pro version of the outstanding FX Aid multi-effects module. 200 onboard stereo effects, customisable via an online app, with added CV inputs and even more physical controls. Superb.

Supplier's Notes:
FX AID Pro:

OLED screen shows current effect's number, name and its three parameters

200 onboard effects which can be arranged in any order via the online editor https://fxaid.app/pro

Instant switching of the effects or seek then activate option

Stereo input level control

SRR input can also be routed to parameters 1-3 or effect selection

Advanced internal lfo which can be routed to the Sample Rate, parameters 1-3 or effect selection

Manual control of the Sample Rate with one click for default position

10 user storable presets with handy indicator lines for each stored parameter

Screensaver with 1, 10, 30, 60 minutes options

Easy update by playing wav file, level indicator for proper volumes matching