Skip to main content Skip to search Skip to main navigation

Sound Sources

Filter products

Erica Synths - EDU DIY Hi-Hat
Erica Synths - EDU DIY Hi-Hat

sold out at the moment

Synthesized, analog Hi-Hats are pretty fascinating. That’s because emulating any kind of cymbal using an analog circuit is tough since the sound a real cymbal produces is not quite pure noise, but also not really harmonic. Still, a couple of classic drum machines like the Roland TR-606 and TR-808 took their best shot at it, with quite strange-sounding results that have since become iconic in electronic music. Inspired by this, we decided to follow suit and continue our percussion-focused second season of educational DIY kits with the mki x es.edu DIY Hi-Hats.FeaturesFeatures:• TR-808 inspired circuit• Manual Tune, Decay and Tone controls• CV controlled Tune and Decay (-5V to +5V)• Accent input (>+2,5V)We – Erica Synths and Moritz Klein – have developed a series of educational DIY kits under the brand name mki x es.EDU with one specific goal in mind: to teach people with little-to-no prior experience how to design analog synthesizer circuits from scratch. What you’ll find in the box is not simply meant to be soldered together and then disappear in your rack. Instead, we want to take you through the circuit design process step by step, explaining every choice we’ve made and how it impacts the finished module.NB! All kits in these series are simple and come with extensive user manuals that can be downloaded separately, therefore we will not provide customer support in case your DIY build fails to function or similar.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€79.90*
Erica Synths - EDU DIY Labor
Erica Synths - EDU DIY Labor

only 2 left

This is the Full Kit with a wide assortment of essential components (resistors, capacitors, ICs, transistors) so you can start building right away.Get started in circuit design with MKI x ES Labor. Developed in collaboration with Dr. Shalom D. Ruben teaching professor for engineering at the University of Colorado Labor is a fully-featured circuit design playground and a powerful electronics learning tool all in one. Created with the aim of serving as a universal learning tool for electronics engineering Labor enables users to delve into various aspects of electronics design from fundamental concepts to advanced techniques. Whether you're a beginner exploring the basics or an experienced engineer honing your skills Labor provides a versatile platform for experimentation and learning. Create your own filters oscillators envelopes sequencers – and whatever else you can come up with. Or use it to learn the basics by following along with our series of educational DIY kits.Features:• a built in dual power supply producing eurorack-compatible voltages, with built-in over current protection for safe experimenting• a modular interfacing section with 16 slots for potentiometers, jacks & switches• a pulse/triangle/sine oscillator (audio & LFO range)• a multi mode envelope generator controlled by a premium push button• a buffered variable control voltage source• an output amplifier with variable gain• a dedicated headphone output and a line-level output for recording, processing and analyzing the signal• an expansion slot for installing specialized prototyping tools• a protective lid to cover a breadboard.EDU DIY Labor Full Kit includes:• LABOR• Power Supply Unit• jumper cables• array of interfacing elements like potentiometers, jack sockets, switches• commonly used components (resistors, capacitors, chips, transistors) to start building circuits straight awayNB! LABOR is a testing ground for experiments with electronic circuits and we as a manufacturer cannot by any means diagnose any issues with circuits designed on the LABOR board. We will only respond to support tickets regarding obvious malfunctions of the factory-soldered circuits on the main LABOR board. For other cases of malfunction – please consult other LABOR users/ experienced DIY kit builders on online forums, such as this one. Keep experimenting – keep trying!DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.

€237.00*
Erica Synths - EDU DIY Noise/S&H
Erica Synths - EDU DIY Noise/S&H

available

Whether you use it for self-sequencing, for adding a dash of randomness to your filter movements, or for rough analog bitcrushing, a sample & hold-circuit can often be the secret sauce that takes your patch from decent to distinctive. That’s why we came up with this super simple JFET-based implementation – and then upgraded it with a couple of extra features like an internal clock generator or a dedicated slew output. Of course, we’ll need an interesting input to sample – which is why you’ll often find sample & hold modules with an integrated noise generator. So we’ll do the same! But instead of just one noise color, we’ll throw in two extra: pink and blue in addition to the standard white noise.We – Erica Synths and Moritz Klein – have developed a series of educational DIY kits under the brand name mki x es.EDU with one specific goal in mind: to teach people with little-to-no prior experience how to design analog synthesizer circuits from scratch. What you’ll find in the box is not simply meant to be soldered together and then disappear in your rack. Instead, we want to take you through the circuit design process step by step, explaining every choice we’ve made and how it impacts the finished module.In total, we have developed 9 kits to build a fully-featured modular monosynth: a sequencer, a VCO, a wavefolder, a noise/S&H module, a mixer, a VCF, an Envelope generator, a dual VCA, and an output stereo mixer with a headphone amplifier. Additionally, an affordable eurorack case with a DIY PSU will also be available. While these kits are easy to build, we did not compromise on design and functionality. We will launch one kit every 4-6 weeks. For each kit, there is an extensive user manual (40+ pages; can be downloaded separately) that will dive deep into not only the electronics behind each circuit but also the fundamental principles of sound synthesis. We hope that the mki x es.EDU project will inspire future engineers and will contribute to the ever-growing diversity of electronic music technology.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€73.50*
Erica Synths - EDU DIY Snare Drum
Erica Synths - EDU DIY Snare Drum

only 1 left

No drum machine is really complete without a punchy, snappy Snare Drum. Together with the Kick, it creates the rhythmic backbone for most grooves. So for our percussion-focused second season of educational DIY kits, we knew we had to come up with a Snare circuit that would complement the Kick and Hi-Hat we’ve already released. After a lot of fine tuning, here’s what we came up with: introducing mki x es.edu DIY Snare Drum.Features:• Manual and CV controlled Tune• Tune CV depth attenuator• Manual Attack and Decay control• Manual and CV Snappy (noise and tone crossfade) control• Accent inputWe - Erica Synths and Moritz Klein – have developed a series of educational DIY kits under the brand name mki x es.EDU with one specific goal in mind: to teach people with little-to-no prior experience how to design analog synthesizer circuits from scratch. What you’ll find in the box is not simply meant to be soldered together and then disappear in your rack. Instead, we want to take you through the circuit design process step by step, explaining every choice we’ve made and how it impacts the finished module.NB! All kits in these series are simple and come with extensive user manuals which can be downloaded separately, therefore we will not provide customer support in case your DIY build fails to function or similar.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€79.90*
Erica Synths - EDU DIY VCO
Erica Synths - EDU DIY VCO

only 2 left

This is an easy to build VCO with a really extensive documentation and explanation of the circuit. Excellent learning kit!The mki x es.EDU VCO is the first educational DIY kit in this series. It is an analog sawtooth-core oscillator with a reasonably accurate volt/octave tracking, made from just a handful of basic components. It features sawtooth and pulse outputs as well as 1V/oct, FM, and PWM inputs.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€73.50*
Erica Synths - Pikocore XL
Erica Synths - Pikocore XL

available

Pikocore XL is a Raspberry Pi–powered lo-fi music mangler originally developed by Zack Scholl.The Picocore has been reimagined by Erica Synths with a more playable, performance-ready design. The original Pikocore started life as a tiny pocket-calculator DIY device; Erica Synths worked with Zack to preserve the same functionality while giving it their signature hands-on interface and a sturdy aluminum enclosure.Features:• a lo-fi music mangler based on the Raspberry Pi Pico (brother of the nyblcore).• capable of holding 8 minutes of 8-bit 33 kHz monophonic samples.• powered by a single alkaline AAA battery for up to 3 hours or by powered by USB-C.• tempo-synced with a selectable BPM between 60 and 300, with samples mangled by beat-synced effects (stutter, retrig, gate, tunneling).• loaded with real-time effects like a resonant filter, timestretching, volume, and wavefolding.• sequenced with a 128-step sequencer with recording/playback• saved and loaded via EEPROM for instant patch recall.• able to load custom firmware, new samples, all through USB-C.• sync-compatible with Pocket Operators.• open-source, wonderfully hackable.DIY-Kit-Type:SMD-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. All SMD parts are pre-soldered, only trough-hole parts to solder. For build guide, more info, videos etc. please check the buttons below.

€194.00*
Exploding Shed - Christmas Tree Module
Exploding Shed - Christmas Tree Module

available

It's christmas time in your modular rack and this year we invented a proper christmas tree module! The LEDs of the tree change color and are used as oscillators to generate weirdo-sound. There are four sections with two LEDs each which modulate each other. You can patch the oscillator outs to the left or right output with mini-patch wires.With this DIY kit you have 2 options:1) The tree can be used standalone with a 9V battery as a simple light effect which is standing on a table etc. In this version there is no audio possible.2) You complete the whole module and solder the tree to the panel. Then you can make use of the full audio possibilities.This kit is perfect to build it with your kids or finally convince your partner, that modular maybe isn't that bad.DIY-Kit-Type:SMD-Kit-2. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. It includes SMD and through-hole parts! For build guide, more info, videos etc. please check the buttons below.

€19.00*
Feedback Modules - Static
Feedback Modules - Static

available

Static module it's a comprehensive collection of noise sources generated with different methods.Features:• 2 control pots: MORPH, SPECTRUM• 1 switch: spectrum type TR/CHIP• 8 outputs: MSWHITE, MSPINK, ZNWHITE, ZNPINK, DARK, MORPH, TROUT, RNDVOLTDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€53.50*
Feedback Modules - SUB
Feedback Modules - SUB

available

As the name suggests this module can produce sub frequencies of -1 and -2 octaves relative to the square wave signal provided at the input jack.But this is not just a simple SUB generator. It also has a little mixer that will let you add different levels of -1 and -2 octave signals to the original square wave. You can select the -2 octave signal to be a square wave or a pulse wave.The module has individual outputs for the mixed signal, the -1 octave and the -2 octave.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€53.50*
Feedback Modules - VCZIII A (Base)
Feedback Modules - VCZIII A (Base)

available

The VCZIII voltage controlled oscillator modules are our latest creation and are based on the VCOs of one of the most revered analog 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 NORMAL FINE TUNE POTENTIOMETER.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€142.80*
Feedback Modules - VCZIII A (Premium)
Feedback Modules - VCZIII A (Premium)

only 2 left

The VCZIII voltage controlled oscillator modules are our latest creation and are based on the VCOs of one of the most revered analog 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.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€178.50*
Feedback Modules - VCZIII B (Base)
Feedback Modules - VCZIII B (Base)

available

The VCZIII voltage controlled oscillator modules are our latest creation and are based on the VCOs of one of the most revered analog 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.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€142.80*
Feedback Modules - VCZIII B (Premium)
Feedback Modules - VCZIII B (Premium)

only 1 left

The VCZIII voltage controlled oscillator modules are our latest creation and are based on the VCOs of one of the most revered analog 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.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€178.50*
Frequency Central - Boom
Frequency Central - Boom

sold out at the moment

Analogue drum voice with a broad range of applications. Boom!! can be used to create bass drums, tom toms, chirps, blips and clicks. The heart of the module is a VCO which is built around one half of a LM13700. The VCO has a HIGH/LOW switch as well as a SWEEP control, which defines it’s response to the onboard envelope.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€60.00*
Frequency Central - Cosmic Background
Frequency Central - Cosmic Background

sold out at the moment

100% analogue fully modular super flexible drum voice module.Features:•White noise source•Release generator with voltage control•Voltage controlled filter with lowpass and highpass options•Voltage controlled amplifierDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€82.00*
Frequency Central - Horror Show
Frequency Central - Horror Show

sold out at the moment

Horror Show is a 4 HP combined noise generator/digital ring modulator/sub oscillator.Noise generator with filter frequency control. Filter is twin-t type. The noise output is normalised to RM X Input and also to the Sub Osc Input, so that 5 types of noise are simultaneously available, all of which can be further affected by twisting the filter frequency knob.Digital Ring Modulator, comparator based. May also be used as a pulse width modulator by patching in any audio waveform and any controller waveform.Sub oscillator with 3 simultaneous outputs: -1 square, -2 square, -2 pulse. May also be used as a clock divider.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€68.00*
Frequency Central - Infinitely Maybe
Frequency Central - Infinitely Maybe

available

Infinitely Maybe is a full featured randomness module, with a number of sources of randomness:• White noise• Pink noise• Sample and hold circuit• Random gates circuitAn onboard CV mixer allows you to mix two different sources into the sample and hold circuit. White noise is normalised to CV input 1, Pink noise is normalised to CV input 2Infinitely Maybe has an onboard clock for triggering the sample and hold circuit. This may be overridden with an external clock if required via the clock in socket.There is a built in LAG circuit, which enables the S/H OUT to slide between voltages at a predetermined rate. This function can be remotely controlled via the LAG INFinally, a random gates output is derived from the S/H Out. With the MAYBE knob at 0 a constant gate is available. The further you turn the MAYBE knob towards 10, the less likelihood of a gate is.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€112.00*
Frequency Central - Klang Stadt
Frequency Central - Klang Stadt

sold out at the moment

Klang Stadt is the latest FC iteration of Electric Druid’s VCDO digital wavetable oscillator.Features:• CV’d interpolating waveforms• LFO• CV’d subosc waveforms and octaves, CV’d glide, bitcrushing and more!• Frequency CV input accepts 0-5V control voltages• Quantized to semitones, to cover the MIDI note range 0-63• improved PWM filtering• addition of Sub Two output• addition of Klang output• addition of Xmod feature• onboard LFO for riding the wavesDIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€100.00*
Frequency Central - Monograf
Frequency Central - Monograf

available

20 HP hardwired synth voice for fast set up times, with a decidedly East Coast feel.Monograf is a fixed signal path monophonic synth voice with many unique features, including a number of patch points for flexibilty within a modular setting. Our aim was to design the simplest full featured and good sounding single VCO synth within as small a space as possible, while offering a broad sonic palette and fast setup times.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€165.00*
Frequency Central - Product
Frequency Central - Product

sold out at the moment

Full featured, fully modular synthesiser for Eurorack with a pre-patched normalised signal path for quick setup.A combination of the XVCO TWO, Raging Bull 3.0 VCF/VCA, and System X Envelope, where each section can be used completely individually or as part of the larger whole.Onboard LFO for PWM and FM and Noise Source.DIY-Kit-Type:THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.

€200.00*