Synth modules

Notes: Add-on for the Krait module.

Ewa was created as a lovely partner for the Krait module, a syncable 3-channel modulation source. Paired with Ewa, Krait will get new useful abilities, such as 3 freely routable cv inputs, endless encoder for smooth editing without value jumps, dedicated clock menu button and clock and reset outputs.

Each CV input can be used to record external cv source in Record mode. Beside that you can route any input to any parameter of the LFO and Random too. With Ewa now it is easy to modulate LFO rate or Random slew for example. CV inputs are bipolar and react to the signals between -5 +5 voltages.

Additionally a dedicated clock menu button and clock output can make Krait as a clock source for other modules in your system that need sync.

Technical details

4 hp

20 mA +12V

12mA -12V

0 mA 5V

42 mm deep

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

To use Ewa, you need to install firmware 2.0 on Krait.

Notes: Module A-188-9 is a so-called high speed VCO that tracks perfectly to the 1V/oct scale in the frequency range of about 15kHz ... 500 kHz. The main application is the exact drive of BBD modules (A-188-1/2) to generate sounds realized by means of the so-called Karplus-Strong synthesis. But even in cooperation with other modules featuring high speed inputs (e.g. digital noise, delay, frequency divider) the A-188-9 makes sense. In principle the module is made of a precision audio VCO followed by a PLL (phase locked loop) unit that multiplies the frequency of the audio VCO by 32. Thus the module can be used also as an audio VCO as it features the standard waveforms sawtooth, triangle and rectangle with adjustable pulse width.

Controls:
Frq: frequency control (coarse)
CV: attenuator for the frequency control input CV
Fine: frequency control (fine), small control without knob
PW: pulsewidth control for the rectangle output of the audio VCO, in HSVCO mode this control has to be in the range marked "HSVO", small control without knob

Sockets:
1V: frequency control input 1V/oct scale
CV: frequency control input with attenuator CV
socket with rectangle symbol: rectangle output of the audio VCO, the pulse width of this output is adjusted by means of the control PW, output level ~ 7Vpp (~ -3.5V/+3.5V)
socket with sawtooth symbol: sawtooth output of the audio VCO, output level ~ 7Vpp (~ -3.5V ... +3.5V)
socket with triangle symbol: triangle output of the audio VCO, output level ~ 7Vpp (~ -3.5V ... +3.5V)
socket with inverted comb symbol: high speed VCO output, waveform rectangle, output level ~ 5Vpp (~ -2.5V/+2.5V)

Switches:
Range
upper position: audio VCO mode (frequency range of the audio VCO about 15 Hz to 6 kHz, the high speed output is not usable in this mode! )
lower position: High Speed VCO mode (frequency range of the high-speed output about 15 kHz ... 500 kHz, frequency range of the audio VCO about 500 Hz ... 15 kHz), in this mode the audio VCO and the high speed VCO can be used simultaneously

Slew
upper position: medium slew time
centre position: short slew time
lower position: long slew time
Technical Note regarding the Slew parameter:

Besides the audio VCO the module contains a so-called PLL circuit (Phase Locked Loop) and a 1:32 frequency divider. A slew limiter is part of the PLL. It defines how fast the frequency of the PLL follows the frequency of the VCO. The PLL cannot follow the VCO without any delay. Rather one has to find a compromise between the residual ripple of the PLL frequency and the frequency follow rate. That is the job of the slew limiter (works in principle like a glide or portamento unit). For this the module is equipped with a 3-position switch that is used to switch the slew time in 3 ranges. When mostly higher frequencies are used ((~ 100kHz ... 500 kHz) a short slew time can be chosen. When also lower frequencies are required (< 100kHz) a longer slew time may be used to reduce the residual frequency ripple. More details about the working principle of a PLL can be found in the information about module A-196. Module A-188-9 is in principle an A-196 combined with an audio VCO and a 1:32 frequency divider.

Width: 4HP / 20.0 mm
Depth: 45 mm (measured from the rear side of the front panel)
Current: +30 mA (+12V) / -15 mA (-12V)

Notes: Easily connect your modular system to the rest of your setup with Out, a compact 2HP stereo line output and headphone module. Despite its small size, it includes everything you need for clear, convenient listening.

The top section features stereo modular-level inputs with LED indicators for quick level monitoring. From there, the signal is routed to both a stereo line output and a dedicated headphone jack, each with independent volume control. Whether you're sending your modular through external effects, recording into an interface, or just monitoring with headphones, Out keeps things simple and efficient.

Notes: The Morphor VCO is a compact yet powerful analogue oscillator designed to be the foundation of your Eurorack system. Built around the legendary 3340 architecture, it delivers the clean, precise waveforms that have shaped countless classic synth sounds.

Despite its slim 6HP footprint, the Morphor VCO packs a versatile feature set. It offers four dedicated outputsisquare, saw, triangle, and sineiproviding a rich palette of tones. Pitch control is precise and stable across the entire audible range, with fine-tuning via a tune knob, CV input, and an attenuated FM control for added modulation flexibility.

A three-position octave switch, hard sync input, and pulse-width modulation (PWM) round out the module, making it a reliable and expressive sound source for any patch. Whether you're crafting deep basses, soaring leads, or complex FM textures, the Morphor VCO is ready to deliver.

Features

100% analogue
4 dedicated outputs
Trangle/Sine/Square/Saw
3-position octave switch
FM
PWM
Hard-Sync

Specifications

Panel width: 6 HP
Panel height: 3 U
Module depth: 25 mm
Dimensions: 128.5 x 30.3 x 25 mm
Mass: 111 g
Power Socket: 16-pin

Current draw:
12 V: 26 mA
-12 V: 23 mA
+5 V: 0 mA

Notes: Combine up to four audio and or CV sources into one output, with independent manual level control.

It can be used as a four-channel mixer or as two separate two-channel mixers, depending on the connection.

If a cable is connected to the Master output but not to the 1+2 output, all channels will be summed at the Master output. If both the Master and 1+2 outputs are connected, the Master will output the mix of channels 3 and 4, while the 1+2 output will provide the mix of channels 1 and 2.

Each pair of channels has an LED indicator that shows the presence of a signal.

Notes: Mutes goes above and beyond basic muting by allowing you to split groups of signals to multiple destinations, making it great for FX dub performing and varied signal routing.

Vactrols on the circuit gives to the switching a pleasing decay for both audio and modulation as well a totally click free muting.

Three-position switch: MOMENTARY signal pass-through (it springs back to the center when released); OFF (or muted) in the center; and ON to the right.

Notes: Voltage-controlled lag processor and slope detector

Transforms stepped notes into smooth acid slides with independent speeds for both upper and lower notes.

The onboard slope detector generates gates while the output is rising or falling, allowing events to be activated when moving to upper or lower voltages.

Additionally, it can convert a gate signal into an Attack-Sustain-Release (ASR) envelope.

The shape control feature helps balance speed versus input range, enabling quicker speed while sliding to further notes allowing for time compensated portamento.

Features

Perfect pitch tracking (error < 1 mV)
Independent rise and fall controls
Assignable CV input for rise and fall times
Three selectable speed ranges
Fader-based interface allows for one-handed adjustment of rise and fall times

Specs

Current needs: +12V: 20mA, -12: 15mA, 5v:0 on additional rails
Width: 4 HP
Depth: 25 mm (including power connector)
Designed, kits prepared and modules assembled in Barcelona

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


'Beast's Chalkboard' is dual channel stepped voltage source and adder for your eurorack modular synthesizer system. It primarily is intended as a dual octave switcher for VCO's but has many other uses including sequence transposition, FM ratio creation, buffered CV distribution and VCO calibration.

Technical Specifications:

Supply: +/-12V (Reverse voltage & polyfuse protection)
Current Draw: ~30ma
Size: 6 HP
Depth: 22mm (including power header)
Offset Error: +/- 10mV

Notes: Operation of the Astra is both simple and straightforward - the large touch panel on the front will respond gradually to soft and firm touches, making it easy to inject some human feeling into your compositions.

Being fully analogue, the controller uses an internal vactrol and slew rate limiter to make it easy for you to create smooth transitions - when used without an input, the MMI Astra uses an internal 5v source as the basis of its signal, allowing you to easily generate complex CV to control other modules, in order to create intermittent filter sweeps, resonance peaks and much more.

By using the input, you can route in both CV and audio to destinations of your choosing, attenuating and amplifying by varying pressure and position on the touch plate. Easily introduce LFOs, create huge reverb or volume swells, or intermittently introduce fading soundscapes as you play.

The front facing LED gives you immediate visual feedback on the status of the module as you play, making it easy to control the MMI Astra. It's the MMI you've wanted for years, finally made real.

Sixe: 4HP

Notes: Octo I/O is a bi-directional passive Polytip to 3.5mm expander and a Polytip Mult. The expander section lets you break out to each individual voice from a polyphonic module. The mult section lets you mult Polytip polyphonic signals from one source to multiple destinations. For example patching the OCTOSTAGES envelopes to control both your OCTOPASS filters and HEXAGAIN VCAs.

Dimensions:

6HP - Depth: 15mm

Current Draw:

Module does not draw current

Notes: The SetonixSynth/Tidbit Audio Psychedelic Voltage Processor, or PVP, is a four-channel chaos module. It uses colour-changing LEDs to produce fluctuating voltages in response to the Channel input, with each channel normalized in series to create increasingly chaotic "taps" that can be used one after another for different variations.

Any positive voltage input such as unipolar LFOs, envelopes, stepped voltages, or simply the onboard normalized voltage patched to a channel input is reproduced approximately on each channel output, with the PVP inducing unpredictable fluctuations due to the variable current consumed by an LED circuit with a mind of its own.

Dimensions
8 HP
25 mm deep

Current Draw
135 mA +12V
10 mA -12V
0 mA 5V

Notes: Rack power bringing 1.25A (1250mA) on both the +12V and -12V rails. There is a 5V rail, but it pulls from the +12V rail, up to 750mA. So only use the +5V rail if you have to.

Comes with 12-position flying bus cable and wall power supply. The wall power supply is the same unit as After Later Audio use on their cases, so there's plenty of headroom and you don't have to worry about memorizing which amperage is for which.

This should be roughly enough for 1 rows of modules in a 104hp case. If you need power for 2 rows, check out The Force module.

Notes: The M module is a 5-way Polytip signal multiplier. It takes a single polyphonic audio, CV, or gate signal set and routes it to up to five multiple outputs. The module is completely passive and requires no power. Like all Polytip jacks on Tiptop Audio modules, the jacks on the M module are top-quality components made in Japan.

Size: 4HP - Depth: 15mm

Power: no power required

Notes: ***B-STOCK: Product with some signs of usage but in perfect working order***


Pico DSP is a small brother of the popular stereo effects processor Black Hole DSP. It contains eight algorithms, in detail four delays, two types of reverb, Leslie speaker emulation and an Overdrive/Bitcrusher. Each effect is editable in two parameters. One of them can be modulated using the CV input. Pico DSP features clear, high-resolution sound. Alongside the established standards, it is also possible to generate lots of freaky special effects.

Notes: Module A-145 is a low frequency oscillator, which produces cyclical control voltages in a very wide range of frequencies.

Five waveforms are available: sawtooth, inverted sawtooth, triangle, sine and square wave. The LFO can be used as a modulation source for any number of modules - for instance modulating the pulse width or frequency of a VCO, modulation of the cut-off frequency of a VCF, or amplitude modulation with a VCA.

A three-way switch lets you select three frequency ranges, spanning from one cycle every several minutes at the lowest, to moderate audio frequency at the highest (about 4-5 kHz).

The LFO signal can also be synchronised, via the reset input.

Identical to the A-145-1, but only 4 HP wide and with additional LEDs for the square wave and the sawtooth signal.

Power consumption: 30mA at +12V and 20mA at -12V
Depth: 45mm
4 HP

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


The Morphor Envelope - Dual ADSR is a slim (6 HP) dual envelope generator. Each channel features standard ADSR (Attack, Decay, Sustain, Release) analogue circuitry, providing the classic, rich envelope shaping tools essential for any modular enthusiast. It features separate control knobs for the attack, decay, sustain and release parameters, two independent channels for versatile envelope shaping and each channel comes equipped with gate, re-trigger, output, and an inverted output.

On the back of the module you can find tiny switches for each channel to change the overall length of the complete envelope:
Short: 5 ms - 30 s
Med: 25 ms - 60 s
Long: 60 ms - 200 s (=3.3 min)

Features

100% analogue
Dual channel
Attack length control
Decay length control
Sustain level control
Release length control
Inverted output
Re-trigger

Specifications

Panel width: 6 HP
Panel height: 3 U
Module depth: 40 mm
Current draw: 12 V : 32 mA | -12 V : 32 mA | +5 V : 0 mA
Dimensions: 128.5 x 30.3 x 40 mm
Weight: 111 g
Power Socket : 16-pin

Notes: ***B-STOCK: Slight surface marks ***


Module A-192-2 contains two independent CV/Gate-to-Midi/USB interfaces. For each of the two sub-units these inputs are available:

- Gate Input (min. +5V)
- CVN Input (defines the Midi note number), 1V/octave standard, range 0...+10V (i.e. 10 octaves)
- CVV Input (defines the velocity value assigned to the Midi note message), can be used alternatively for Midi volume (CC#7), range 0...+5V
- CVC Input (free assignable to any Midi control change number), range 0...+5V

For both sub-units a common CV Transpose input is available (1V/octave, range 0...+10V). The voltage applied to this input is added internally to CVN before the Midi note number is generated. It can be used e.g. to transpose two sequences simultaneously by one voltage.

How it works:

Whenever the rising edge of the Gate input is recognized a Midi note on message is generated. The note number corresponds to the sum of the voltages applied to the CVN input and the common CV Transpose Input that is present at the rising edge of the gate signal.

Notes: You can never have too many voltage controlled amplifiers VCAs! (voltage controlled amplifiers). Ampera offers 4x VCAs in a tiny 6HP footprint with manual potentiometer control mixed with CV control.

Amplification ranges between 0.1x-2x, so you can make your 5V signals 10V with an offset voltage. Chain 2 channels together, and you have boost.
Ampera has bi-polar LEDs that display red or blue depending on the polarity of the signal. At audio rates, the LEDs show purple.

An excellent solution for those with small systems, or those just looking to free-up some space in their Eurorack cases.

Important note: Ampera works both for CV and audio. However, if audio is passed though, it will always be slightly audible, as the VCA circuit has some leakage (cannot completely mute). Two channels can be used in series to mitigate this if necessary.

Technical specs:

- Module Size: 3U X 6HP X 25 mm deep
- Current Draw: 70mA@ 12V, 70mA@ -12V

What's in the box:

- 1x Ampera module
- 1x Power cable
- 2x Mounting Screws

Notes: Meet Mixel: A eurorack modular synth that can mix 3 inputs, sum 3 inputs, and invert 2 channels! A handy addition to any skiff!

Combine and buffer 3 signals (CV or audio) in the MIX section with dedicated level knobs (fade from 0 (muted) to 2x boost) and an output signal attenuator. Featuring LEDs which show the polarity of the signal (blue for positive, red for negative, and purple for audio rate).

Sum up to 3 signals in the SUM section to make some cool audio or CV signals.

Invert any signal using the INVERT section, with two separate invert channels!

Technical specs

- Module Size: 3U X 6HP X 25 mm Deep.
- Current Draw: 15mA@ 12V, 15mA@ -12V.

What's in the box?

- 1x Mixel Module
- 2x Thumb Screws
- 1x Power Cable
- 1x Sticker

Notes: Reduxer is a stereo sample reducer effect module.

Depends on it's signal, It can produce dynamic range of sounds from knurly bitcrushing to formant/vowel style effects.

Extra resolution

Custom made Redux potentiometer with 300 degrees rotation for extra crashing resolution.

Double the power

Two proprietary sample reduction circuits with extra offset control on channel 2 via the "Spread", lets you create motion in the streo field for wider effect.

Stereo operation

Inputs are normelized - supporting mono to stereo configuration.

Reduction under control

Redux CV input with attenuator for external control of the bit reduction rate.

Reverse polarity protection

The module have proper reverse current and over current protection in its power input stage to protect the module in case it was connected the wrong way or connected to a faulty power supply.

Dimensions

Width: 8HP
Depth: 20mm

Current draw

+12V: 25mA
-12V: 25mA