V2.1 PCB set, one minor fix – some users had found the switch a little tight to fit.

This is a full kit which includes every single component to build a Radio Music module right down to the Teensy microprocessor board, the knobs, rack screws and power cable.

NOTE – you need to purchase a MicroSD card and a Micro-B USB Cable elsewhere to set up this module. The Micro-B cables are the smallest type shipped with Kindles and many Android phones. You also need a card reader to write files to the SD card, many laptops and desktops already have them built in now. – Read the setup and build documentation here.

The very cheap $2 MicroSD cards are not worth the trouble they will cause you, buy genuine SanDisk or Kingston branded MicroSD cards from Amazon or elsewhere. 32Gb maximum… that’s 108 hours of lossless audio in 16bit 44.1khz. Total file limit per card is 1200 files.

Full project details and documentation here – http://github.com/TomWhitwell/RadioMusic/

This kit includes everything you need to build the Mkii version of the Turing Machine. You just need to provide the tools and solder. Comes with 1ohp Aluminium Eurorack panel.

Since it was launched in June 2012, the Turing Machine has become one of the most popular Eurorack DIY projects. It is a random looping sequencer that spits out basslines and melodies. It generates strings of random voltages that can be locked into looping sequences. These sequences can be allowed to slip, changing gradually over time. This module was inspired by the long history of shift register pseudorandom synth circuits, including the Triadex Muse, Buchla 266 Source of Uncertainly and Grant Richter’s Noisering.

The 2016 revised Turing Machine has many improvements:

• Rotary loop length switch
• Pulse out
• Two boards, includes Backpack circuit to drive expanders (compatible with old Music Thing expanders)
• Easier to build: a larger PCB in the same width, clock and noise circuits are more robust
• Noise level trimmer & reduced voltage in noise circuit to make circuit more robust with different noise transistors
• Compatible with existing expanders (Pulses, Voltages, Vactrol Mix) but not the BYTES expander.

“I am interested in perceptible processes. I want to be able to hear the process happening throughout the music.To facilitate closely detailed listening a musical process should happen extremely gradually.” Steve Reich, Music as a Gradual Process, 1968.

Power – 40ma +12v, 0ma -12v

Depth – 33mm

Width – 10hp

Modular Grid – https://www.modulargrid.net/e/music-thing-modular-turing-machine-mk-ii

Build Document – https://thonk.co.uk/documents/turing2016/

Technical support and info – https://github.com/TomWhitwell/TuringMachine

THIS IS A FULL DIY KIT

It contains all components required for a complete build, right down to rack screws and power cable. We selected and used the high quality parts as specced by Random*Source. Random Source have created a full step by step build doc for this project.

Most of the components are already soldered! The back board is already fully populated and soldered with SMD components, this is therefore a very quick build that mainly requires soldering of pots, jacks, trimmers, LEDs and headers.

SERGE MODULAR FOR EURORACK – Under licence from Serge Tcherepnin

“Serge Modular” is an analogue modular synthesizer system developed by French composer and electronic designer Serge Tcherepnin in the 1970s at The California Institute of the Arts. Serge’s vision to create a “people’s synthesizers” led to a unique modular music system with an iconic design.

In collaboration with and under licence from Serge Tcherepnin, Random*Source offers a range of Serge modules, combining the original Serge circuits with the advantages of today’s technology. The modules on this page are in Eurorack (3U) format – modules in the classic Serge dimension (“4U” panel height) and the typical banana jacks can be found here.

 for a Eurorack passive triple attenuator module (4hp).

A very simple and very useful Eurorack DIY kit. Below you’ll find links to very thorough build instructions written with synth DIY beginners in mind. This module requires no power from your busboard or prior electronic knowledge, it’s completely passive.

Each of the three attenuators can be set to either a linear or logarithmic response with a jumper on the back of the PCB. Linear is more user friendly for CV attenuation, Log for audio signal attenuation.

Build time: 20-60 mins depending on experience.

Everything is included to make and rack the pictured module, even the solder. You just need a soldering iron and a pair of side cutters to finish the build.

• Panel – 4hp – Anodised Aluminium with industrial Alu-Print legend
• Knobs – Davies 1900h clones
• Alpha 9mm pots
• Thonkiconn jacks
• Solder (a generous amounts for beginners)

Build Documentation

https://thonk.co.uk/documents/at-at-at/

Sampling Modulator is a multi-function module. Something between a VCO a Sample & Hold and a 8 step trigger sequencer

It can work as:

–Sequencer clocked Sample and Hold. In this mode it is like a regular sample and hold, but since it is “sequencer clocked” make more interesting patterns than the usual S&H melodies because they can have more repetition.
The clock In, can work in two ways: Clock and Sync. Clock is just a typical clock and Sync is a “positive going Hard sync” so you can create shuffling and poly-rhythmic Fx with it.
also the hold In is useful to keep some notes on.

-Analog down sampling effect. In that mode (with the clock running at audio rates) you can go from nasty and harsh Sampling rate reduction to almost clean signal. (the clock run up to 25Khz without external CV and up to 200Khz with CV on the input)

–Sampling Modulator. (or maybe is better to call it sampling shaper)
Due to the V/oct clock, you can feed the IN with a simple wave shape like a sine, and later send pitch CV to that VCO and to the Sampling modulator CV In, so the two frequencies are related to each other and the aliasing created by the sampling rate reduction is also related to that frequency creating lots of clangorous metallic sound, 8 bit textures and much more. The game became much more interesting when you begging to destroy the wave turning on and off the switches of the sequencer. (sometimes it sound like tree VCOs the same time…)
To understand this mode keep in mind it have a temperature compensated ramp core VCO with more than 4 octaves tracking, so the timbre keep the same when you move trough different notes because the internal and external VCOs are moving same way in something like a “frequency related sampling rate modulation”

-8 step trigger sequencer. Just a regular utility trig generator, useful also as clock divider. The switches have tree position. On, Off and Reset (reset to the first step for non 4/4 signatures)

-Unusual V/oct VCO. You can use the trigger outs like a pulse VCO but when you switch on and off the switches timbre changes a lot

A surprising Swiss knife in just 8HP

Block diagram:

Specs:

• Compatible Eurorack
• Current:
• 8 HP / 47 mm depth
• Power drain: 48 mA +12V / 18mA -12V

Assembly manual

Schematics PDF | CAD/CAM files

Math & Rhythm

Two outputs and five different rhythmic flavors multiply by a load of “algo-rhythmic” processing to result in a practically infinite number of polyrhythms. That’s the fundamental formula that produces the Knight’s Gallop principle : a dual trigger generator providing sequences according to tables and modes.

The source tables contain patterns such as the Euclidean polyrhythms, and the modes allow the user manipulate and mangle those patterns according to different algorithms. As the module has two outputs, it is a very powerful instrument to create diversified and instantaneous polyrhythms.

Features

• Dual Output Trigger Generator

• Variable length sequences (up to 16 steps)

• Length and Pulse amount potentiometers and CV inputs

• Shift + & shift – buttons allowing to shift the sequence forward and backward

• Main (MN) mode providing a lot of utlity modes for the second output : reset, no shift, invert and reverse

• Compute (CP) mode calculating associated sequences for the second output delivering very musical polyrythm

• Random (RD) mode adding randomness on the sequence feeding the second output, 4 amounts of randomness determined by the sub mode

• Dual (DL) mode allowing to set the two outputs seperatly

• Record (RC) mode turning the Knight’s Gallop into a “play your sequence on the buttons and record it” module

• Five different kind of tables for five different rythmic flavours : Classic Euclidean (CE), Revised Euclidean (RE), Erdos Deep (ED), Divide Integer (DI) & Divided sequences (DS)

• User replaceable firmware chip

• Elektron style push buttons

• High quality metal potentiometer with double rubber injected knobs

• Skiff friendly (25mm deep)

• 8 HP Wide

Jürgen Haible’s WASP Filter is now available for eurorack in a dual version with some modifications and addons – including a MODE section that acts as a dynamic link between both filters. It allows to combine the filters in series or parallel or anything in between – even voltage controlled(!). Also, each side can blend from lowpass to highpass or bandpass (yes, the notch is in there, too!) creating infinite filterbank combinations. A Sync switch has been added to be able to control both side’s cutoff frequency with from the left side. The unique distortion can be configured to PRE or POST for each side. This is a (mostly) through-hole version containing very few optional SMT parts (not included).

Random*Source has acquired Jürgen Haible’s legacy and is the only authorized source of Haible designs.

DUAL WASP AUDIO SAMPLES

DOCUMENTATION

This kit contains everything you need to build a 4ms Swash.

This is an intermediate-level kit. You should be confident in your soldering skills, and have a basix familiarity with electronic components.

The Eurorack Noise Swash is a chaotic random noise-maker and CV generator, generating its own sounds or working as an audio processor. As a stand-alone device it generates unpredictable continuously morphing oscillations on the Audio Output jack, and random CV fluctuations out the dual-direction “Mood CV” jack. A second CV input jack controls the Swash and Noisegate sections with positive and negative CV voltage. An audio input jack allows for distorting an audio signal beyond recognition, or using audio to trigger and modulate the chaos. The Swash knob is a 10-turn Bournes pot for adjusting minor variations. Each Swash has its own peculiarly unique sound.

• Schematic (PDF)
• User Manual (PDF)

The Eurorack Noise Swash consumes about 40mA of power and occupies 16 H.P. of space.

Depth: 34mm (1.33″)

Documentation

Build Guide

Parts Image

This kit contains everything you need to build a 4ms Atoner.

This is an intermediate-level kit. You should be confident in your soldering skills, and have a basix familiarity with electronic components.

The Eurorack Atoner is a versatile device used for

• Creating quantized melodies tuned to an input frequency)
• Generating poly-rhythmic clock/trigger outputs)
• Pitch shifting/jumping (downwards based on harmonics)
• General purpose CV mixer with offset.
• General mischief and mayhem…

Harmonics are extracted from an on-board oscillator or external audio signal and outputed as audio or clock pulses. The Position knob sets the cut-off frequency, under which all frequencies will be stepped downwards along a harmonic sequence (octaves, 5ths, 3rds, etc) all the way to sub-audible clicking sounds. Thus, a scale or clock signal can be generated from a single tone.

Two CV inputs and their respective +/- Vary Amount knobs modulate the Position cut-off. The mix of the two CV inputs plus the Position knob is outputted on a CV jack, and another CV output jack provides a steady +10V clock pulse that is jumper-selectable to be a clock division of the audio output (/1, /2, /32, /64, or non-linear division).

The Eurorack Atoner consumes 60mA of power and occupies 16 H. P. of space.

Documentation

Build Guide

Parts Image

This kit contains everything you need to build a 4ms RCD Breakout, this is an expander module for the RCD, it does nothing unless connected to an RCD. You need to build this yourself, this is not a finished module. This is an beginner-level kit. You should be confident in your soldering skills, and have a basic familiarity with electronic components. The RCD breakout adds even more functionality to the ingenious RCD module. Documentation http://www.4mspedals.com/kits.php#clocker

This kit contains everything you need to build a 4ms RCD. You need to build this yourself, this is not a finished module.

This is an intermediate-level kit. You should be confident in your soldering skills, and have a basix familiarity with electronic components.

The RCD is an ingenious clock division device with a unique CV controlled output rotation.

Documentation

http://www.4mspedals.com/kits.php#clocker

This kit contains everything you need to build a 4ms SCM. You need to build this yourself, this is not a finished module.

This is an intermediate-level kit. You should be confident in your soldering skills, and have a basix familiarity with electronic components.

The SCM is an ingenious clock multiplication device with very funky shuffle and slip features.

Documentation

Build Guide

Parts Image

This kit contains everything you need to build a 4ms PEG. You need to build this yourself, this is not a finished module.

This is an intermediate-level kit. You should be confident in your soldering skills, and have a familiarity with electronic components.

The Pingable Envelope Generator (PEG) is a dual envelope generator whose envelope lengths are set by incoming clocks or “pings”.

The PEG has full CV control of envelope shape, skew, and ping (clock) division/multiplication, as well as a plethora of triggering and cycling options (AD, AR, quantization, cycle), and a tap tempo button for each channel.

Documentation

All 4ms Kit build documentation can be found here

• Complete building instruction manual (PCB v1.0.6, latest kit version)
• Kit Parts (PCB v1.0.6)

This is a replacement panel for the Mikrophonie, only buy this if you already have a module. If you want to buy the PCB/Panel set don’t buy this, go HERE instead.

We also offer the piezo electric disc separately as desoldering the old one from your module is likely very hard or impossible.

ADDAC’s Phono Pre Amplifier module, connect your turntable and bring it straight into your patches.

All the surface mount components are already soldered, you just need to solder a few headers, jacks and a pot, assemble and you’re done! Features the required RIAA equalization for correct phonograph playback.

Build Manual is here.

Specs:

The panel is PCB with no soldermask. The raw 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 and grounded for shielding; the peizo microphone can either be soldered directly to the copper or stuck on with epoxy glue.”

The module will work with both DIYed contact mics made from inexpensive piezo transducers (instructions coming soon), 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.

Chord Organ is a new firmware for the Music Thing Modular Radio Music module. It gives the module a completely different function. Instead of playing samples from the SD card, it synthesises chords. On this page you can buy a full kit to build a Chord Organ, or if you want to convert your Radio Music into a Chord Organ, download the software here and buy a new panel here.

In these two video demos Chord Organ is providing all the oscillators you can hear:

……

Here’s another demo, using Chord Organ to drive the vocoder in Mutable Instruments Warps:

READ MORE ON CHORD ORGAN HERE

V2.1 PCB set, one minor fix – some users had found the switch a little tight to fit.

This is a full kit which includes every single component to build a Chord Organ module right down to the Teensy microprocessor board, the knobs, rack screws and power cable.

NOTE – you need to purchase a MicroSD card and a Micro-B USB Cable elsewhere to set up this module. The Micro-B cables are the smallest type shipped with Kindles and many Android phones. You also need a card reader to write files to the SD card, many laptops and desktops already have them built in now. – Read the setup and build documentation here.

The very cheap $2 MicroSD cards are not worth the trouble they will cause you, buy genuine SanDisk or Kingston branded MicroSD cards from Amazon or elsewhere. 32Gb maximum… that’s 108 hours of lossless audio in 16bit 44.1khz. Total file limit per card is 1200 files.

For the build guide the process is identical to Radio Music, you just program with a different hex file – http://github.com/TomWhitwell/RadioMusic

Chord organ does not track 1v/Oct

This is a full DIY kit to build this 4hp 66mm deep eurorack module.

All parts are included right down to the knobs, power cable and screws.

Illustrated Build Document  and Fonitronik Manual – https://www.thonk.co.uk/documents/fonitronik/cascade/

This is a full kit which includes everything you need to build this standalone 8-bit synth.

• 8 bit synth kit (PCB and all components)
• Ready programmed Arduino Uno
• USB Cable
• Acrylic Enclosure kit

The miniAtmegatron is a DIY kit shield for the Arduino Uno. It turns the Uno into an 8-bit synthesizer with an audio engine based on the Atmegatron. If you’re a dab hand at soldering and want to dip your toes into the 8-bit ocean, this could be the synth for you! The package comes with instructions, PCB and all the electronic components. The Arduino Uno must be bought separately.

Features

Specification

Synthesis Engine

The miniAtmegatron synthesis engine is based on the Atmegatron engine, with some features cut back or removed because of the simpler interface. Like the Atmegatron, the mini uses the PWM output of the Atmega328P processor.
To find out more about the synthesis engine, see the Atmegatron page.