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Notes: The RESONANT EQUALIZER (EQ) is a unique ten-band filter designed specifically for electronic sound synthesis and processing. Except for the top and bottom frequency bands, the bands are spaced at an interval of a major seventh. The Resonant Equalizer is designed to produce formant peaks and valleys similar to those in acoustic insstruments.

There are three equalized outputs: the two COMB outputs provide the sums of the two alternate filter bands, while the two top outputs are the (identical) mix of all filter bands. Please note that there is no sharp separation between the bands, moving any frequency knob will have an influence on both COMB outputs. This equalizer is special in that the bands can be set to be resonant: when the knobs are in the middle position, the response at the main EQ Output is flat. When the knobs are positioned between the 9 and 3 o'clock position, up to 12 db of boost or cut is set at the band. If the knob is set beyond the 3 o'clock position, the band will become resonant, simulating the natural resonance of acoustic instrument formant structures. Below the 9 o'clock position, increased band rejection is achieved.

The Random*Source version of the filter is a licensed and authorized adaption of the legendary Serge equalizer for Eurorack. It adds an input mixer with 2 inputs that can be built/used to attenuate or amplify/distort the input signal(s) before they are sent into the EQ and a Feedback section (knob and phase switch) which allows to feed back the output signal or the inverted output signal (depending on the Phase switch). Adding inverted feedback leads to phase cancellation effects - unlike the "normal" feedback, level decreases and the signal thins out.

Notes: The Triple Waveshaper (TWS) is a non-linear modifier which can transform a sawtooth wave into a sine wave. This classic module incorporates three independent waveshapers for modifying synthesizer waveforms or for processing signals from preamplified instruments. Although originally designed as a waveshaper for early Serge oscillators, this module has been found to be a excellent modifier of electronic and acoustic sounds, and is highly recommended for subtle timbral modifications beyond the range of simple oscillator/filter patches.

The R*S version extends the classic TWS concept:

+1: An additional (4th) waveshaper has been added (right after the first / bottom waveshaper) that can be dialed in smoothly using the +1 knob. Turned down (CCW) the bottom section acts as in the original (as if that additional waveshaper would not exist). Turned up (CW) the bottom section is actually 2 waveshapers in series.

Switches to link the 3 sections - bottom to top. Using these switches all sections can be set to act in series, starting at the bottom and ending at the top, providing the combined effect of 3 to 4 waveshapers (or anything in between) using the +1 knob.

Linking only the middle and top section and turning the +1 knob up (to have 2 sections in the bottom) allows you to use the module for isntance as two independent 2-stage waveshapers (using bottom in and out for one and middle in and top out for the other) - e.g. for stereo processing.

Notes: From one of the most iconic names in modular synthesis, the Variable Bandwidth Filter is a unique design, combining two state-variable VCFs with extensive CV control for clean, versatile filtering.

Supplier's Notes:
The Serge Variable Bandwidth Filter (VCF2) is probably the rarest classic filter in the Serge system, offering a unique combination of 2 filters. According to the 1983 Serge catalogue, the Variable Bandwidth VCF (VCF2) "has a band-pass output which can be varied manually or with voltage control. This is a standard response synthesizer VCF, typical to filters used in many studio systems. In the VCF2, two state-variable VCF's are connected in series to produce a total of five outputs. High pass, low pass, two fixed bandwidth outputs, and one variable bandwidth output are available. The outputs are all flat-response (no resonance) so the VCF2 is suitable for processing concrete sounds without introducing resonant coloration to the timbres. Under voltage or manual control, cut-off frequency of the high and low-pass outputs are affected, as well as the center frequency of the two band-pass outputs. Both center frequency and bandwidth are independently controllable on the variable bandwidth output."

Now - for the first time, designed and licenced by Serge - the VCF2 is available as a eurorack module. A new switch has been added which determines if the CV-controls are routed to the first (left), second (right) or both filters, bringing even more sonic options than the original.

Some details of the Random Source Serge VCF2 module:

Original Serge design, under licence and in cooperation with Serge Tcherepnin
Uses for High-end VCAs
Eurorack format (3U), 20 hp
Power consumption: 45mA @ +12V, 45mA @ -12V
Module depth: < 30mm (1.2")

Notes: The Variable Q VCF (or VCFQ, for short) from Random Source is a skiff-friendly Eurorack adaptation of what is perhaps the most famous Serge filter. It is an effortlessly thick and colorful 12dB/oct multimode filter with ultra-smooth resonance that never ceases to amaze. Amazing tonal variety comes from combining outputs, automating resonance settings via CV, and adding grit using its adjustable-gain input.

Simple filtration is only one of the VCFQ's many uses, however. Its amazing trigger input turns rising-edge pulses into thick analog kicks and toms which roughly track notes thanks to a dedicated 1V/oct input. This module also becomes an ultra-powerful modulator in "Lo" mode, with decaying/syncable LFOs well within grasp using the trigger input, along with free-running oscillation when self-patched. When fed stepped sequences, sample and hold, or other LFOs, the VCFQ can even function as an effective slew limiter. And that's not all: for those lucky enough to own two VCFQs, dual-peak resonance and an ultra-thick 24dB/oct low-pass mode offer some of the most rewarding synth sounds in existence. In short, adding a VCFQ to one's Eurorack system is always worthwhile.

Features

Analog multimode filter designed in collaboration with Serge Tcherepnin
Automatic Gain Compensation and Variable Gain audio inputs
Trigger input
1V/oct and attenuverted frequency CV inputs
Attenuated Q CV input
Low Pass, Hi Pass, Bandpass, and Notch outputs
Hi/Lo range switch
This is the skiff-friendly, SMD version of the Random*Source VCFQ

Under licence from Serge Tcherepnin
Designed for High-end VCAs (THAT2180)
No matching of transistors required
No wiring needed

Dimensions
14 HP
26 mm deep

Current Draw
52 mA +12V
52 mA -12V

Notes: LYRA8-FX is a processor that can give you a significant part of the mysterious LYRA-8 sound thanks to the FX section from the LYRA-8, expanded with CV controls and packed into a Eurorack module.

It contains a double modulated lo-fi delay with cross-feedback and the unique possibility of self-modulation, where the delay output signal modulates its own sample rate. Also, it packs a parallel distortion with CV control of the drive. The distortion is after the delay. It's much more than a delay - you can get a simple reverb, comb filter, chorus and much more cool FXs which are hard to describe.

It has a famous LYRA-8 build quality - no SMD, no twisted plastic shafts.

Pots:
IN volume
Stage 1 delay time
Stage 2 delay time
Stage 1 delay time modulation depth
Stage 2 delay time modulation depth
Delay feedback
Delay feedback CV amount
Delay mix
Distortion drive
Distortion mix
Distortion drive CV amount

Switches:
- Stage 1 delay time modulation source
Stage 2 delay time modulation source

Ins:
Audio in
Delay time CV
Delay feedback CV
Distortion drive CV

Outs:
Main audio out
Delay only out

Dimensions:
Width: 20HP
Depth:40mm

Power consumption:
+12V - 90ma
-12V - 20ma

Notes: ***B-STOCK: Box opened, product in perfect working order***


A LS1lightstrip but in THREE fat dimensions!

A matrix of awesome and a powerful and unique CV controller for your system.

LP1lightplane is an expanded, tri-dimensional LS1 lightstrip. The same functions are exposed on either axis plus pressure (z) for three times the fun!

Notes: The Kontact MIC is a lo-fi theme park. It's a Eurorack microphone preamp with a piezo contact mic built into the panel.

The creative applications are endless: finger percussion/rubbing/scratching, guitar input (works surprisingly well with just a little lofi crunch), acoustic sources to CV, etc.

The PCB fibreglass has quite a nice rough texture - rubbing it with a finger or a plectrum creates quite a wide range of sounds. The back of the panel is plated to expand the surface area of the contact mic. The mic will also pick up all the physical sounds in your modular- patching, cables rustling, switches, fingers on knobs - without picking up airborne sounds i.e. the sound your modular is making. At very high sound levels will pick up vibrations from the speaker output and start to feedback.

The module will work with both DIYed contact mics made from inexpensive piezo transducers, off the shelf contact mics (often called Piezo Pickups) made for guitars and violins which you can pick up for ten bucks from Amazon or eBay or more bespoke mics like the popular Jez Riley French models (including hydrophones!) which are firmly aimed at Sound Designers.

It is an easy way to bring environmental noise and feedback into a modular system, inspired by the early days of electroacoustic music in Paris and Cologne, and by the contact microphone and phonograph cartridge experiments of John Cage, Gordon Mumma, Robert Ashley and Nicholas Collins.

Notes: The SoundForce Chorus 6 is 16HP Juno style BDD chorus with plenty of CV inputs. It is using the Xvive MN3009 and the same audio path as the original circuit. It can do the classic Juno I, II and I+II modes. I+II modes are available from both the Juno 6 and Juno 60, each in mono (as the original) or stereo, giving you 4 I+II options. But the manual and external modes can take the module away from sweet and pretty sound territories right into weird and noisy soundscapes.

Some tech-talk:

A chorus effect is created by mixing a dry signal with a delayed signal. The delay time is modulated by an LFO to create more movement. To create some stereo width, the left and right modulation are 180 degrees out of phase. Exactly like the chorus in the Juno 6/60/106, the delay is made with MN3009 BBD chips. Also as in the original design, filters are added both before and after the BBD chips in an attempt to hide some of the artefacts of this very crude IC.

To get the audio "moving" through the chain of MOSFETs in the BBDs, driver signals are needed. This used to be done with the MN3101 BBD driver chip. Unlike the MN3009, there is no clone available of this ancient IC and this was a chance to add some modernity to the design. The drivers were replaced by a modern STM32 micro-controller along some extra ICs to convert the 3.3V logic to the negative voltage needed by the MN3009.

In order to recreate a genuine Juno-type modulation, the BBD driver signals of my Juno-106 were sampled over a few periods. Using the timer peripherals of the STM32, a replica of the BBD driver signals can be sent out to the MN3009's. Although the driver signals only follow a very basic triangle LFO shape and could have been generated using direct synthesis in the firmware, this method gives an exact copy of the original driver signals including all the potential imperfections.

Implementing a digital programmable chip also allows a digital-style interface with tactile switches and LEDs as in the original Juno interface. The last used mode is saved and loaded when the module powers on. The CV inputs (with the exception of the MIX CV) are acquired by the STM32 ADC and can modulate the BBD driver signals based on parameters in the firmware.

Features:

The SoundForce Chorus 6 has 4 main modes: I, II, I+II, MAN for manual and EXT for external. I and II are the classic Juno modes available in the Juno 6/60/106. Press both I and II to enter the I+II mode. While holding down I and II, press the OFF button to cycle through the 4 I+II options:

- Juno 60 mono - 1hz - 8% depth
- Juno 60 stereo - 1hz - 8% depth
- Juno 6 mono - 8hz - 25% depth
- Juno 6 stereo - 8hz - 25% depth

In I, II and I+II, only the mix controls can influence the sound, all the other parameters are fixed and CV inputs are not active.

Mix control:

Using the slide pot (fader) or the CV input, the mix between the dry input signal and the BBD delays output can be set. The orignal Juno balance is reached when the slide pot is in the middle (without CV connected). The mix control is a VCA-based crossfader and is 100% analog which means it can withstand really high audio rate frequency modulation.

MAN mode:

The manual mode gives you the opportunity to control every parameter of the chorus and gives you acces to the LFO that modulates the BBD delay times. Here is what you can tweak:
- time slide pot: sets the start delay time
- rate slide pot and CV input : sets the frequency of the delay time modulation
- depth slide pot and CV input: sets the depth of modulation around the start time
- mix slide pot and CV input: see above
- LFO wave: selection of different waveforms to modulate the delay time
- range: selection of 3 different frequency ranges for the LFO (S: 30Hz to 500Hz | M: 1Hz to 100Hz | L: 0.016Hz/1min to 10Hz)

In manual mode, the EXT IN CV input can be used to change the LFO wave, range or add additional modulation of the delay start time.

EXT mode:

In external mode, the BBD delay times can be modulated using an external signal through the EXT IN cv input. Plug in a CV source from your eurorack case into the EXT IN, set manually the starting delay time using the time slider and use the EXT ATT slide pot to attenuated the incoming CV signal (equivalent to setting the depth). In external mode, the depth/rate sliders and CV inputs are not active.

Stereo inputs:

The Chorus 6 can be used with either mono or stereo input signals. When the right channel is unconnected, the left channel is sent to the right jack so it can be used with mono signals. When using both inputs, each input signal is going through its own BBD delay line.

BBD delay time range:

The Chorus 6 gives you in the MAN and EXT modes a delay range that it is about doubled compared to the I/II modes. The original Juno chorus was using only a very limited range of the BBD chip and really stayed in the sweet spot. Extending to the full spectrum of the MN3009 yields pretty horrible high pitch noise at audio rate modulation, so the range has been limited to a usable section. When you apply high frequency modulation with great amount of depth, the delay time will be pushed in the extremities of its time range and quite nasty artifacts will appear in the form of squeaks and whines. Please note this is a characteristic of the BBD. If you want to reduce those artifacts, reduce the depth of modulation. On the other hand, if you are looking to add characteristic and vibe to the sound, audio rate modulation and plenty of depth will help you to get there.

Input levels:

Both Eurorack and Line level signals can be used as input for the Chorus. A small slide switch between the 2 PCBs can switch between Euro and Line. In Euro levels, the input signal is attenuated to an healthy level that is well below the BBD distortion point. Some headroom is also needed as the chorus is a sum of the input signal and the modulated delayed signals. For that reason, when the chorus is turned off the output attenuation is about 50% of the input level. When the chorus is on, the resulting output amplitude is similar to the input level. Line levels are also accepted by the module when the switch is on Line. Please note that Line levels input will be amplified to the Eurorack levels range at the output of the module. So the output levels are Eurorack in both Euro or Line input ranges.

Specifications:
16HP
Depth: 38mm (including power connector)
Power: +12V 76mA, -12V 35mA

Notes: Nicely thought out four-voice sample playback module from Parisian innovators Squarp. Load up a microSD card with samples (up to 2600 kits), then trigger and process. Neat.

** Firmware update- February 2024 ***

Thanks to a major rework of the OS, this upgrade includes an overall better sound quality and an improved latency.

Moreover, the effects Freeze and Bitcrusher have been redesigned, and the parameters Start and Sample Length are now exponential to facilitate the fine-editing of your samples.

Supplier's Notes:

Rample waves system

Eurorack 4-voice sample player & audio processor

Versatile sample machine

From percussive drum-machine kits to synth samples, breakbeats to sound FX, backing tracks to hour-long audio music, Rample can play up to 4 .wav files on independent audio outputs :

These samples are stored inside the provided SD card, and organized as kits, from A00 to Z99... allowing up to 2600 banks of 4 voices, with on-the-fly loading! The SD card is preloaded with tons of samples, and we made it very easy to import your own kits.

Thanks to the DC coupled audio outputs, it's also possible to play CV waveforms.

Effects rack

Each voice has its own "rack" of effects, and all audio effects can be enabled at the same time, allowing you to manipulate your samples in real time, from a gentle lowpass to massive destruction!

pitch - a great sounding pitch engine, based on a 6-pole interpolator, which ranges from -1 octave to +1 octave.

bits - two different bitcrushing algorithms, based on sample rate and resolution reduction. It produces distortion and warms the audio signal.

filter - a low resonance filter, DJ-style, cutting off the high frequencies or the low frequencies.

freeze - sample and loop a fraction of the played waveform, creating a glitching effect.

levels - decrease the gain or drive the signal.

It's also possible to edit 'advanced parameters' like the start point, sample length, attack/decay and run mode, and create mute groups without breaking a sweat.

Finally, thanks to the 4 CV inputs, any of the effects (or advanced parameters) can be assigned to create amazing modulations!

Multi-layer sampling

One of the key feature is the ability to "multi-sample" your kits, multiplying Rample's potential. Each voice supports up to 12 samples, can be played randomly or in a controlled fashion. It's a great way to add complexity and variations, to create organic/acoustic sounding drums, or simply to increase the number of samples per kit (up to 48).

As an example, Squarp are providing a multi-layered drum kit, with 12 different recordings of a kick, 12 different recordings of a snare, etc. Sequencing them randomly leads to a more natural drum playing.

Another kind of multi-layered acoustic drum kit is also provided, where each drum is recorded with 12 levels of velocity. Controlling the layer to be played leads to intricate, convoluted drums programming.

Of course, it's very easy to create your own multi-layered kit, and you can use this method to perform multiple synth chords, sound glitches, voices, breakbeats, ...

CV/Gate and Midi interface

Rample is designed to be the perfect rhythmic companion of your eurorack system thanks to its Gate (trig samples) and CV (modulate samples) connectivity.

You can also use it as a standalone midi machine, without using the CV/Gate connectivity: the midi in port allows you to trig & control all samples parameters + effects values at the same time. Each Rample comes with a 'stereo jack to midi DIN' and 'stereo jack to jack' adapters, easing the chaining of multiple modules in order to create an 8-voice, 12-voice, 16-voice (or more) midi drum machine!

SD card preloaded with 200+ kits from artists and sound designers, covering a large range of audio samples

Notes: The Mankato Filter is a four-pole lowpass filter with positive and negative outputs at every pole, giving you slopes of 6 dB/oct, 12 dB/oct, 18 dB/oct, and 24 dB/oct simultaneously. The negative slope outputs allow you to use the Mankato as a quadrature sine oscillator with 8 available phases. The Mankato will self-resonate from subaudio to superaudio, and responds to one volt per octave through its unattenuated control inputs. When resonating, the 6dB/oct outputs are slightly hotter than the others and can be driven to lightly saturate at full resonance. The signal inputs are DC coupled, which allows you to use the Mankato as a voltage-controlled slew limiter at very low cutoff frequencies.

Notes: Studio Electronics' version of the boxy, Blade Runner-sweet and Boomstar-brash dual mode CS80 filter, initially married to the Omega Series Synths, and then tucked-in the 'Stars, now joins the Modstar Collective. They've twisted and turned the SE88 to unflatten the earth, so to speak; the original CS80 fed a HP filter into a LP filter, but with the SE88 your can select MODE 1's HP or BR to feed MODE 2's LP or BP, or patch it to reverse that pleasant path. The audio signal is completely controllable with input and output levels for each filter. Cherish and respect your filter's input gain stages, for a smooth yet often brassy sound - shed your mercy to strike hard for boiling, snarling bite, even to the blackout/cutout point (see Greg St. Regis, Tim Caswell, and Marc St. Regis' SEM filter commentary for a detailed diatribe on this "feature too far"); then and only then, uniquely blend mode settings for the filter family values you revere.

To get things merrily modulating, each filter employs attenuverters for frequency and resonance experimentation and decimation. While the SE88 does not self oscillate (Yamaha's creation didn't either), we did amp up the resonance level for full-throttle squelching. An additional master FM (frequency modulation) attenuverter-controlled level can feed both filters (when hungry enough) simultaneously, and tracking switches allow for individual keyboard response for each of the contrasting and complimentary filter modes.

Potentiometer Potential:
Five attenuverter and eight attenuation pots control the FREQUENCY MODE 1, FM IN, FREQUENCY MODE 2, RESONANCE, M1 FM, RESONANCE, M1 RES CV 1, M2 RES CV, INPUT, M2 FM, OUTPUT, LEVEL (M1 OUT), and LEVEL (M2 OUT).

Switch it Up:
2/3 - 1/3 TRACK (M1), FULL - HALF TRACK (M2), HP - BR, LP - BP.

Patch it Up:
Ten patch points: 1 V/O, FM IN, M1 FM, M2 FM, M1 RES CV, M2 RES CV, M1 IN, M1 OUT,
M2 IN, M2 OUT.

All Controls and Patch Points:
FREQUENCY MODE 1 - Adjusts the frequency, or cutoff of Mode 1.
2/3 - 1/3 TRACK - Toggles tracking options for Mode 1.
FM IN - Adjusts the master frequency modulation input.
FULL - HALF TRACK - Toggles tracking options for Mode 2.
FREQUENCY MODE 2 - Adjusts the frequency, or cutoff of Mode 2.
RESONANCE - Adjusts the resonance of Mode 1's filter.
M1 FM - Adjusts Mode 1's frequency modulation.
RESONANCE - Adjusts the resonance of the Mode 2's filter.
HP / BR - Toggles the High-Pass and Band-Reject option.
M1 RES CV - Adjusts Mode 1's resonance control voltage.
M2 RES CV - Adjusts Mode 2's resonance control voltage.
INPUT - Adjusts the master audio input.
M2 FM - Adjusts Mode 2's frequency modulation.
OUTPUT - Adjust the audio output.
1 V/O - One volt per octave control voltage input.
FM IN - Master frequency modulation input.
M1 FM - Mode 1 frequency modulation input.
M2 FM - Mode 2 frequency modulation input.
M1 RES CV - Mode 1 resonance control voltage input.
M2 RES CV - Mode 2 resonance control voltage input.
M1 IN - Mode 1 input.
LEVEL - Level control for Mode 1.
M1 OUT - Mode 1 output.
M2 IN - Mode 2 input.
LEVEL - Level control for Mode 2.
M2 OUT - Mode 2 output.

- Size: 20hp
- Depth: 39.7mm with ribbon cable attached
- Power Usage: 42mA (+12 / -12)

Notes: The Neutron Flux 8 Pole Variable Character Filter is a 12hp skiff friendly eurorack filter module with a stereo analog core and digital control over it. The controls are familiar filter module controls (cutoff, bipolar FM, mode, drive) with some added spice and no complexity.

The special stuff is in these controllable features:

Character: This control blends between five vintage influenced classic filter characters: Fat, Crisp, Liquid, Sour and Mean. Coming later in a firmware update, the Neutron Flux will also have two user banks for more specialized filter characters which can be replaced via audio update.

Overdrive: You can switch the drive circuit to have a +20dB boost and have the drive pot to sweep from clean via warm saturation to extremely hard distortion.

Stereo: This control spreads the cutoff between L and R channels and induces drift. This way a mono signal can be split into wide stereo.

Two 4 pole filter cores: These can be run in stereo, mono to stereo or chained as a 8 pole mono filter for almost LPG-like steep slope. Both of them have their own drive circuits so you can have the overdrive stage in the front, in between or both.

The module can be used in many different ways. It can do classic LP/HP/BP filtering. It can self-oscillate in different waveforms. It can provide analog warmth and process something coming out of your DAW. It can act as a stereo distortion. It can spread your mono signal to a wide spatial stereo soundscape. It can do formant stuff and other wild characters. It can do audio-rate deep FM (1V/oct and FM CV's are all analog).

Power consumption: 250mA at +12 V and 100mA at -12 V
Depth: 25mm
HP: 12

Notes: The 1U Lil' Buff Mult is a precision buffered multiple in a small package. It fits in both Intellijel and PulpLogic 1U rows.

Features:

1 to 3 precision buffered multiple
Fits both Intellijel and PulpLogic 1U rows
Uses a typical 10-16 pin power cable
Specifications:
Module width: 6HP
Module depth: 25mm

Notes: The 1U Mattson Buffered Multiple is a PRECISION buffered mult that is perfect for 1V/O CV sources. A signal plugged into INPUT A will be available from all 8 OUTPUTS. Break the chain by adding a second signal into INPUT B; signal A comes out the 4 "A" outputs and signal B is available at the 4 "B" outputs.

Please note: Synthrotek's 1U products do not fit in Vermona or Intellijel cases.

Current draw: +12 18mA, -12 18mA
Width: 20HP
Depth: 32mm

Notes: The 1U Stereo Mixer is intended for pannable stereo output, but it is also suitable for both DC (Gates, Triggers and Control Voltage) & AC (audio) signals.

Specifications:
Current draw: +12: 13mA, -12: 9.2mA
Depth: 32mm
Width: 24HP
Please note: Synthrotek's 1U products do not fit in Vermona or Intellijel cases.

Notes: The 1U UniBuffer combines a buff mult and a unity gain mixer into a 1U module. It's great for small cases where you want both functions available (like the Power Lunch).

The Buffered Multiple is a PRECISION buffered mult that is perfect for for 1V/O CV sources. The 1U Unity Gain Mixer adds input signals together and combines them for a summed output.

Current draw:
+12V: 14mA
-12V: 13mA
Module Depth: 20mm
Width: 20HP
Polarity protected

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 2HP Buff Mult is a precision buffered multiple, perfect for your 1V/O sources. An LED on each channel indicates positive or negative incoming voltage: red is positive, green is negative. Channel one cascades into channel two, giving you up to 7 outputs.

Features:

Two Channels:
Channel one is 1 to 3
Channel two is 1 to 4
Cascaded input: CH 1 > CH 2
LED voltage indicator on each input

Specifications:

Current draw:
+12V: 15mA
-12V: 15mA
Depth: 22mm
Width: 2HP

Notes: The Five Amp is a throwback to SynthRotek's original 5A Power Supply with some upgrades. It uses a quality 12V power brick for the +12V power regulation instead of a +12V converter. The plus side of doing it this way is that whatever amperage the -12V and +5V rails are not using can be used by the +12V rail, which always draws the most of the three.

Five Amp comes in three different power configurations. It is recommend that you select an option based upon your -12V rail draw. For a rule of thumb, Red (with red LEDs) will power a single row of 84 or 104HP, Green will power two rows of 104HP, and Blue will power three to four rows of 104HP.

Notes: The Octave Fuzz is SynthRotek's take on the classic 70's SuperFuzz circuit, made into a Eurorack module, which has improved on some aspects of the original as well, including an increased output.

Two distinct voices like the original: switchable between scooped midrange and massive midrange bump.

Aggressive: It will sound massive and in-your-face like no other circuit can. This is for sonic explorers and heavy music only. In short, it's not useful for EVERYTHING, but the things it DOES do it excels at. Sounds especially killer for keyboard and bass sounds.

Tuned to give a subtle distorted waveform one octave up via wavefolding (see the video to view this on an oscilloscope). (Completed modules come pre-tuned; there are calibration instructions at the end of the assembly instructions for the kits)

This circuit has been optimized for Eurorack. You can find a guitar pedal version here.

Current Draw:
32mA @ +12v
24mA @ -12v
0mA @ +5v

Notes: ***B-STOCK: Box opened, product in perfect working order***


OBEY is a dual-function module: one half envelope follower and one half attenuverter / offset generator.

Envelope Follower:
The OBEY takes an audio or CV signal and uses it to trigger an envelope or gate for use in a Eurorack system. It is designed to work with a wide variety of input levels: plug a Eurorack module, passive microphone, piezo, guitar, drum machine, Game Boy into your Eurorack system.

Attenuverter / Offset Generator:
Attenuvert your voltage sources up to two times in the positive or negative! The offset generator provides up to 5 volts in the positive or negative.

Specifications:
Module width: 4HP
Module depth: 48mm
Current draw:
+12V: 25mA
-12V: 18mA

Notes: Test your modules safely without reaching into your case! The TST has two keyed 16-pin headers on the front of the module so you can plug and unplug quickly and easily. Two 16-pin plugs are included to shield the power pins when the module is not in use. It also has LEDs to indicate the power status on each rail.

Please note: Use this module at your own risk. You will be exposing electricity to the front of your modular system. Be careful not to dangle patch-cables, etc. on the exposed pins. This may damage modules and your power supply. Be smart and safe!

Features and Specifications:
Two 16-pin connectors and plugs on the front side of the module
LED indicator for each rail
Module width: 3HP
Module depth: 5mm
Current draw:
+12V: 1mA
-12V: 1mA
+5V: 1mA
Includes keyed power cable, 2.5mm and 3mm screws

Notes: 2ENV is a dual attack - decay envelope; it can be switched between full sustain (the output remains at full level as long as the GATE input is on) and zero sustain (for percussive envelopes). Another switch (SLOW/FAST) allows selecting the time range.

For manual triggering there is a button for each envelope.

CV control: Both attack and decay time can be CV controlled; the CV "multiplies" the time by 1...approx. 8 times.

Notes: A dual LFO with different waveforms and triangle-sawtooth blending.
The 2LFO module has two LFO units with different features and generates modulation voltages mostly below the audio range. This module offers

RATE knobs for controlling the frequency
SLOW / FAST switch for two frequency ranges; with FAST the rate can go into the lower audio range
SHAPE knob for the first LFO, blends from rising sawtooth to triangle to falling sawtooth
Triangle / Sawtooth switch for the second LFO; changes the waveform of the output
PULSEWIDTH knob for the second LFO, this sets the pulsewidth of the according output
control LEDs for the output waveforms
PWM input for modulation of the squarewave pulsewidth of the second LFO

Notes: The 2OSC/d module contains two 1V/octave hybrid oscillators. Each of them features:

- One frequency knob plus a range switch +2 octaves
- CV input (1V / octave)
- PWM input
- SYNC input
- Sawtooth/Square/Sub-octave output

The pulsewith knob controls either the pulsewidth of the first oscillator (with the second one having a fixed pulsewidth), or via a switch the second oscillator is also controlled by the pulsewidth knob. Both oscillators can be pulsewidth-modulated independently by their PWM inputs.

The module is designed as a hybrid digital/analogue module; the oscillator frequencies are determined digitally and are therefore quite stable and have a good tracking; the output wavefom itself is created analogue. It's a new idea/concept that I have implemented here; the design causes the waveform to get a bit gritty at higher frequencies (but not "digital noise") - it's the character of this thing!

Notes: 4I/O offers four minijack sockets that are connected to the AE sockets for connecting external audio sources, CV's and Eurorack modules. Sockets 1 and 3 are stereo sockets; if a stereo cable is inserted here the signal is available on sockets 1/2 and 3/4. With mono cables the four sockets can be used independently.

All sockets have an overvoltage protection (as AE modular is limited to 5V) and can be switched between audio and DC/CV signals.

Notes: The classic ADSR envelope with CV control for all parameters

The ADSR module offers the classic four-stage envelope (Attack, Decay, Sustain, Release) that is not only loopable (patch the end output into gate input) but also accepts CV control over each of the stages! For the time values (A, D, R) the value set by the knob can be increased to five times the duration by the corresponding CV value. For the Sustain value the knob and CV value are simply added.

Notes: The CVSHIFTER module is the AE version of the well-known analogue shift register modules that are around in the modular world since a long time. It works like this: The CV input is sampled with each trigger input signal and this CV is sent to the CV 1 output; at the same time, all CV outputs 1-4 are shifted by one.

Compared to the "classic" circuits, this module is digital based and therefore doesn't suffer from drift as some analogue ASRs and S&Hs do. The result is, that you can e.g. control the pitch of up to four oscillators which is a first step into polyphony.

The CVSHIFTER module offers three modes:

Classic: Each trigger shifts the CV outs by one position, the new CV goes to output CV 1
Cycle: Each trigger sends the CV to the next output channel, restarting at out 1; additionally a gate signal at the according output.
Random: The CVs are sent in random order to one of the four outputs, plus a gate at the according output.

Notes: The DIODEFILTER is an adaption of the well-known diode ladder filter that became most popular by Roland's TB-303 bassline. And here it is for the AE modular!

Notes: DRONX is a special mixer designed especially for the DRONE38 module; if has 6 input channels (so you can connect two DRONE38 modules) and offers some sound processing capabilities: A tone control with bass and treble control, a distortion, and finally a dual delay with different algorithms. Two insert points allow to add up to two more audio effects to the internal signal chain. Together with the DRONE38 module(s) you get a quite nice drone synth for dense, dark soundscapes.

Of course, it can be used with any other sound sources!

Notes: The MIXCONSOLE XLROUT module is an extension of the MIXCONSOLE and makes the master outputs available as two balanced XLR sockets.

The module is connected via a small internal connection cable to the right of the MIXCONSOLE or as neighbour of the MIXCONSOLE JACKOUT module.

Notes: A multi-mode divider for clock and audio signals.

It can be used either for dividing clock signals (e.g. from an LFO, BEATDIVIDER) for rhythmical purposes but also for audio signals - in this case you get subharmonics / lower octaves squarewaves at the outputs, which can be mixed or used separately.

The module has eight outputs which - depending on the selected division mode - provide different division factors of the input signal:

Beat: musical/rhythmical clocks are generated as 1/1, 1/2, 1/4... 1/16 and triplets
Binary: the outputs work as binary counter (same as the predecessor module DIVIDER)
Decimal: The outputs have decimal divisions of the input, meaning half, third, quarter, fifth... of the input clock
Prime: The outputs use the prime numbers as division factors
Fibonacci: The outputs use the numbers of the fibonacci row as division factors

The reset input resets all output signals; in case of audio signals this can get quite unique, ringmodulator-like sounds.

The Shift knob shifts/rotates the outputs; usually, the fastest output is on output 1, but with shift the entire output pattern is shifted so the fastest output can be set to any position 1...8.

Notes: The famous MS 20 filter for AE modular!

This adaptation of the filter used first in Korg's MS-20 synth for AE modular offers control knobs for cutoff frequency, resonance and CV attenuator. Two signal inputs for different signal levels control the "drive" of the module. Compared to the wasp filter this filter has a significant self resonance and also a very quick response to changes in the cutoff frequency.

The filter type is switchable between lowpass and highpass (LP/HP switch).

Notes: Stereo effects processing for Tangible's affordable AE modular system. Offers a total of 15 digital effect programs with CV control over three parameters each. Can run in Eurorack via an optional adaptor frame.

Supplier notes:
The MULTIFX module offers 15 different stereo audio FX programs, a wide variety from common FX like reverb and delay to unique effects like Ring Crusher or Glitch delay. Also a nice shimmer effect is onboard.

Each program has 3 parameters that can be adjusted and additionally be CV-controlled.

With a switch the sample rate can be reduced to half the normal rate, resulting in doubling the effect times (with reverb, delay...) and introducing a nice portion of aliasing.

It is based on the FV-1 DSP chip that is well-known from other FX-modules in the Eurorack world; the MULTIFX module offers the 7 factory programs of the chip plus 8 new and unique ones created by Tangible Waves.

Notes: The PHASER module runs the signal through a chain of all pass filters, which brings a very distinctive sound when the filter stages are modulated. Well known is this sound by many pieces of electronic music in the 70's and 80's; especially with the SOLINA as audio source you get this unique spacey sound known from these days. With a switch you can select 4 or 8 stages; more stages make the modulation more deep and intense.

The module has a low-frequency LFO onboard, an external modulation CV can be used also as modulation source.

Notes: Connect two AE cases with RACKLINK!

The RACKLINK is a module for connecting two AE cases; the kit contains of 2 identical modules and a connector cable (length 50 cm). The modules are placed in both cases and are connected by the cable.

By this, you get the following:

The second case is powered by the first one

All bus lines (CV, GATE, CONTROL, MIDI clock/start/stop) are connected to the second case

Additionally, there are 8 connections that can be freely used; so it is not necessary to have connections between two cases. E.g. the second rack can run a patch for a drone sound, the output is then sent via Racklink line 1 to the first rack and here patched to a mixer, via line 2 the second rack can receive a modulation signal from the first one. The lines are bi-directional!

Notes: SOLINA, an emulation of the 70ies string machines!

The SOLINA module is based on th excellen work of Jan Ostman, who has developed a very good digital based emuation of the sound of the string synths that were popular in the music of the 70ies and 80ies, like ARP Solina (who gave this module it's name), Logan String and others.

Their unique sound is based on several, minor detuned sawtooth oscillators and an ensemble effect.

This module produces chords, which can be shaped in different ways, like selecting the base scale (minor, major), adding the 7th or a bass note and different variations of the chord. The sound can be shaped with a variable oscilator spread/detune, adding a phaser/ensemble and a tone knob for choosing the overall character between bass focused to only higher parts of the sound.

Notes: Unique, vintage reverb sound.

The SPRINGREVERB module brings the unique sound of this quite old (introduced in the 60's) technique for creating reverbs to the AE modular.

The reverb works by sending the audio signal to a set of 3 springs; at the other end of the springs the sound is picked up by a transducer, converting the mechanical movement of the springs back into an electrical signal. When the audio signal arrives at the end of the springs, the waves are reflected several times; these reflections create the reverb sound.

The spring "tank" (a metal box containing the springs and transducers, size approx. 24 x 9 x 3.5 cm) is connected externally by a cable.

The product contains all components: The module itself, the spring tank and the connection cable.

Note: The sound of a spring reverb is quite unique and has a strong vintage character; if you are looking for a more "clean", natural sounding reverb please take a look at the MULTIFX module.

Notes: With the STOMP-IO module, you can integrate guitar effect pedals and similar devices into your AE modular system! For output (send) and input (return) return there is a mono minijack socket; two minijack to 1/4" socket adapters are included as effect pedals usually work with the latter ones. Send and return levels can be controlled with separate knobs.

Notes: Each of the three USB-A sockets on the USBPOWER module can be used to charge your mobile phone, connect a USB lamp or supply power to any other USB device. Furthermore, the output socket provides +5V and ground to supply e.g. DIY circuits on a breadboard.

Please note: This is only a power source via USB sockets; no USB data communication is possible here.

Includes additional USB lamp!

Notes: This module is best if you need an oscillator for primary musical / melodic use.? It offers:



- two CV inputs 1V/octave

- Modulation input with Level-knob, switchable to frequency or pulsewidth

- PWM input

- Coarse / Fine knob for frequency

- Pulsewidth knob for square wave

- Square / Triangle / Sawtooth output

Notes: XMIX is a swiss knife for signal mixing and attenuating, offering four(!) mixers and two attenuators in a 1U module. It is designed especially with very small AE systems in mind.

You get:

A three channel mixer "A" with knobs
a passive mixer "B" with four channels
two four-channel mixers "C" and "D" with full level / one-third-level inputs
two attenuators with seven different attenuation levels

All mixers can be used / switched for audio and CV signals.

Notes: The module was named Kuzmin Filter in the past as a tribute to the developer of the Polivoks, Vladimir Kuzmin. For certain reasons, the module will now be called GRUNGE Filter (due to the sound), with the circuitry remaining unchanged.

The Polivoks was a Russian synth that was produced between 1982 and 1990.This module is the AE version of the filter that gave the Polivoks a unique, rough sound.

Beyond the basic design, this filter offers some additional features:

Two different resonance characteristics, hard and soft
An FM function, that adds the input signal to the modulation of the filter
An optional overdrive for the output, making the sound even more rough and untamed.

Notes: Designed with versatility in mind, MapVolt is a dual-channel Universal Voltage Processor built for flexibility in handling audio and CV signals.

With only 6hp, Mapvolt is a multipurpose tool for voltage-controlled scaling, inverting, offsetting, subtracting, and mixing functions.

Each channel of MapVolt can operate in either Polarizer or Attenuator mode, allowing manual control via knobs or CV signals. In Polarizer mode, it functions as a Voltage Controlled Attenuator-Inverter, granting control over signal level and polarity. Additionally, it can be used as a Four-Quadrant Multiplier or Ring Modulator for audio signals, with the processor input serving as the carrier signal and the polarizer's CV input acting as the modulator.

In Attenuator mode, MapVolt operates as a VCA, providing control over signal levels. Its VCA CV input range of +5/-5 makes it well-suited for amplitude modulation (AM) with other +/-5V waveforms.

MapVolt is equipped with dedicated Voltage Offset knobs for each channel, which can be controlled via CV. If no input is patched into the Processor input channel, the Voltage Offset knobs can be used as Offset Generators.

With its dedicated mixing stage, MapVolt enables the combination of both channels into a shared output. Furthermore, if one of the processor channels is inverted, it allows for the subtraction of one signal from the other.

Dimensions
6 HP
33 mm deep

Current Draw
65 mA +12V
65 mA -12V

Notes: The OpticTone is a combination of a 12dB multi-mode Vactrol Filter and a Vactrol Voltage Controlled Amplifier.

It is a completely original circuit inspired by the singular nature of Vactrols and their fluid and natural character.

The Filter section provides the three fundamental filter types: Lowpass, Bandpass and Highpass.

A Resonance knob with voltage control input is available for improved modulation flexibility. The feedback knob interacts with the Resonance path, tempering it from creamy resonance to wacky self-oscillation.

Filter and VCA run in parallel, both are controlled by the Freq/Amp knob and it's associated voltage-control input. The combination of both signals can be crossfaded with a dedicated knob.

The Freq/Amp is also controlled with direct touch control on the panel via the 3 lines below the knob.

The filter frequency control can be inverted by the Inv Freq switch, providing the possibility to change the filter direction. This feature allows the filter to "close" when the VCA is "opening" or the other way around.

The Ping input allows to generate the well known vactrol filter percussive sounds if a gate or trigger signal is provided. The Ping frequency if controlled by the Freq/Amp knob, ranging from low kicks drums to high pitch bongos.

There is also a Drive knob to take care of your saturation needs. The Overdrive range is wide, from soft textural clipping to heavy distortion.

All voltage controlled inputs have an attenuator-inverter knob.

Features:

Vatrol based 12dB multi-mode Voltage Controlled Filter: Lowpass, Bandpass and Highpass.
Vactrol Based Voltage Controlled Amplifier.
Crossfade between VCF and VCA section.
Voltage controlled Resonance.
Ping Input for percussive sounds generation.
Cutoff Frequency polarity inversion switch. Doesn't change VCA polarity
Overdrive and Feedback controls.
Attenuator/inverter knobs on all voltage controlled inputs
Touch control over Frequency and Amplitude.


Specs:

Width: 10HP
Depth: 33mm
Power consumption: 55mA +12 / 55mA -12
Eurorack Format
Doepfer power connection

Notes: SkipLog, a probability processor with sequence capturing and looping features, along a range of other versatile functions waiting to be explored.

SkipLog is a 3-channel rhythmic probability processor designed for inventive rhythmic exploration in modular setups. Introduce unpredictable rhythmic possibilitis to your creative flow.
SkipLog's basic operation is simple: when a trigger or gate is received at one of its three channels' inputs, the same channel’s Probability knob allows you to control the likelihood of these triggers or gates reaching the output. This inputs are internally connected .

SkipLog continuously captures the binary outcomes of its use, storing them for potential sequences. Activate the Loop function to break from pattern creation and loop the recorded sequences. Individual Loop Length knobs for each channel allow adjustment of the loop sizefrom 1 to 16 or 32 steps (as selected on the back), providing evolving rhythmic patterns.

To fine-tune your arrangement, SkipLog introduces functions like Mute for real-time channel silencing, Inv for signal inversion, and Choke for establishing channel priorities. Lastly, the G/T (Gate/Trigger) Mode enables users to specify whether the channel output is a gate or a trigger.

Dimensions
8 HP
33 mm deep

Current Draw
100 mA +12V
22 mA -12V

Notes: VastWave is a complex analogue Oscillator with advanced waveshaping capabilities that invites new textural and harmonic exploration beyond subtractive synthesis principles.

Crossfading between harmonically rich folded waveforms and waveforms with Odd/Even harmonics, the VastWave waveshaper expands on the Principal Oscillator heritage, bringing an additional set of waveforms with Odd and Even harmonics and a pulse waveform derived from the Waveshaper's Final output stage.

Furthermore the linear FM input has a dedicated VCA for external FM amplitude modulation and an on board linear Glide delivers a more musical approach to this classic feature.

Features:

Voltage controlled complex waveshaping.
Triangle core.
FM input with voltage controlled amplitude for FM amplitude modulation.
On board linear Glide.
Voltage controlled Pulse-width modulation for Pulse and Final Pls waveforms.
Modern temperature and tuning stability.
High Frequency (VCO) or Low Frequency (LFO) operation.
External Timbre input with sine wave normalization if no external source is patched.
Attenuator/inverter knobs on all voltage controlled inputs.
Inverted or double Sawthooth waveform (selectable by jumper).


Specs:

Width: 16HP
Depth: 33mm
Power consumption: ###mA +12 / ###mA -12
Eurorack Format
Doepfer power connection

Notes: This module is a 12 ins and 12 outs precision buffered matrix.

It is conceived to be a semi-permanent matrix for medium to big systems, with white silkscreen labels to customize ins and outs names.

Every output has a rotary switch to select an input. This is not a mixer, you can make the same input go through several outputs but not several inputs go to the same output.

There's also a bicolor led next to every output for visual info of the signal that is going through it.

This module allows fast patch changes and easy rerouting signals, both audio and cv.

The last version has matte black & gold panel, and it's equipped with OPA4171 precision op-amps for the buffers.

26 HP
45 mA +12V
45 mA -12V

Notes: This module is a 8 ins and 8 outs precision buffered matrix.

Every output has a rotary switch to select an input. You can make the same input go through several outputs but not several inputs go to the same output.

There's also a bicolor led next to every switch for visual info of the signal that is going thru it.

Allows fast patch changes and easy rerouting signals, both audio and cv.

Can be used as a traditional buffered multiple, pretty flexible one: 1 x 8 outs, 2 x 4 outs, 4 x 2 outs or any other combination.

62 mA +12V
65 mA -12V

Notes: VU meter for eurorack.

BLINKS is a VU meter for eurorack with 24 RGB leds per channel, function is pretty easy, it has 2 inputs, one for each led column (no output).

PATT button changes the led pattern ( 6 patterns to choose ).

SENS button changes the input sensitivity, cycling in 7 steps.

Long pressing the PATT button enters the color scheme selection.

Long pressing SENS button enters the brightness adjustment. Most probably you'll prefer the lowest setting.

The module has a 5v regulator in case you don't have 5v in you eurorack PSU. A jumper in the back select if the led board would be powered by the 5v rail or the internal regulator (which works with the +12v rail)

Up to 3 stereo signals can be connected to a buffered input using the rear headers.

Easy DIY with only a few components, the led board is already assembled.

5v not indispensable
+5v: 30 mA (on lowest brightness)
+12v: 4mA (or ~40mA if 5v rail is not used)