Learning Modular Level 2: Eurorack Expansion

The "Eurorack Expansion" series core rack

Already have a small modular or semi-modular synth and wondering what you should get next and how to get the most out of it? Then this course was designed for you – particularly if you’ve already watched my Learning Modular Level 1 or Moog Mother-32 courses. In it, I:

  • show how I will be displaying audio, control voltages, and harmonic spectra as well as the color-coding for patch cables in this course
  • discuss what I consider to be the main utility or “glue” modules you should consider for any system, including mixers, VCAs, multi-function modules such as the Expert Sleepers Disting, and more.
  • explore six major categories of modules – oscillators, filters, other sound modifiers, modulation sources, level control modules, and modular effects – showing you what to look for and how to patch them into your system
  • give deep dives on an ever-expanding list of modules, showing you how they work as well as how to use them in a musical context

This course will empower you with a better idea what features to look for in a module, which ones might create the sounds you’re looking for, and how to make good use of them once they’re in your system.

A list of the over 185 movies in this 28+ hour course is shown at the bottom of this page. Here is the introductory video:

If you want more information, click here for more details on this idea behind this course,. I also want to note that you don’t need a huge modular system to take advantage of this course: virtually all of these movies are based around a small modular starter system (click here for more details), and focus on what possibilities will open up as a result of adding a single module to this system.

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Fill out the form below, choose your preferred method of payment, and then click the Pay & Register for this Course button. If you choose Stripe, this page will refresh – scroll back down to here and fill in your credit card info. If you choose PayPal, you will be taken to their site to complete payment. If you entered a coupon code, it will be calculated before your final payment.

Note: This course is included in the 5 Volt, 12 Volt, and 24 Amp tiers of support for the Learning Modular Patreon channel. An abbreviated version of it is also available through LinkedIn Learning.


After paying, look for an email confirming your username and giving login instructions; save it. (Look in your Junk folder if you don’t see it shortly after registering.) If you have already paid and registered, but are not logged in yet, click here or in the main menu and select Courses > Courses Login.

Still undecided? I’ve created a several posts featuring free-to-all sample movies from the Eurorack Expansion course; feel free to sample these first:

Table of Contents for Learning Modular
Level 2: Eurorack Expansion (extended version)

Module 1 Introduction
Unit 1 Welcome
Unit 2 Waveforms, harmonics, and voltages
Module 2 Integrating with a Eurorack System
Unit 1 Getting sound out
Unit 2 Comparing built-in and dedicated CV converters
Unit 3 Getting more expression out of your controller
Unit 4 Introducing the multi-function Disting
Unit 5 Improving articulation with a 2nd envelope  - Preview
Unit 6 Patching VCAs for alternate outputs
Unit 7 Using VCAs to control mod depth
Unit 8 Mixing oscillator waveforms
Unit 9 Mixing and altering control voltages
Module 3 Adding a Second Sound Source
Unit 1 Adding a second oscillator: tuning
Unit 2 Adding a second oscillator: mixing
Unit 3 Intellijel Dixie II+: overview
Unit 4 Dixie II+: waveforms
Unit 5 Dixie II+: hard sync & flip
Unit 6 Dixie II+: static FM (frequency modulation)
Unit 7 Dixie II+: dynamic FM
Unit 8 Verbos Complex Oscillator: overview
Unit 9 Verbos Complex: harmonics (waveshaping)
Unit 10 Verbos Complex: FM (frequency modulation)
Unit 11 Verbos Complex: AM (amplitude modulation)
Unit 12 Verbos Complex: soft sync
Unit 13 Mutable Instruments Braids: overview  - Preview
Unit 14 MI Braids: wavetable synthesis
Unit 15 MI Braids: analog emulations
Unit 16 MI Braids: West Coast techniques
Unit 17 MI Braids: vocal and formant synthesis
Unit 18 MI Braids: physical modeling
Unit 19 MI Braids: percussion synthesis
Unit 20 MI Braids: other algorithms
Unit 21 Lifeforms Double Helix VCO: demo + overview
Unit 22 Lifeforms Double Helix: waveshapes + VC routers
Unit 23 Lifeforms Double Helix: exponential FM
Unit 24 Lifeforms Double Helix: wavefolder + LPG
Unit 25 Radical Frequencies Dual Precision VCO: overview
Unit 26 Radical Frequencies DPVCO: static FM
Unit 27 Radical Frequencies DPVCO: dynamic FM
Unit 28 Radical Frequencies DPVCO: soft sync
Unit 29 Endorphin.es Furthrrrr Generator 1/5: Overview
Unit 30 Furthrrrr Generator 2/5: Exponential, Linear, and Through-Zero FM  - Preview
Unit 31 Furthrrrr Generator 3/5: Amplitude, Balanced, and Wavefolder Modulation
Unit 32 Furthrrrr Generator 4/5: Waveshaping
Unit 33 Furthrrrr Generator 5/5: Hard and Soft Sync
Unit 34 Make Noise tELHARMONIC 1/5: overview
Unit 35 tELHARMONIC 2/5: Noise synthesis
Unit 36 tELHARMONIC 3/5: Harmonic (Additive) synthesis
Unit 37 tELHARMONIC 4/5: Phase Modulation synthesis
Unit 38 tELHARMONIC 5/5: Music Theory
Unit 39 Steady State Fate Quantum Rainbow 1/3: noise colors
Unit 40 SSF Quantum Rainbow 2/3: noise in a patch
Unit 41 SSF Quantum Rainbow 3/3: noise for percussion
Unit 42 EMW Noise Station 1/3: Colors of Noise
Unit 43 EMW Noise Station 2/3: Filters & Tone Controls
Unit 44 EMW Noise Station 3/3: Using for Percussion
Unit 45 Erica Synths Fusion VCO 1/2: demo + oscillator
Unit 46 Erica Fusion VCO 2/2: tube dividers
Module 4 Alternative Filters
Unit 1 Patching in a different filter
Unit 2 Doepfer A-106-5 SEM filter: overview
Unit 3 Doepfer SEM: alternate filter modes
Unit 4 Erica Dtech VCF: overview
Unit 5 Erica Dtech: exploring instability
Unit 6 Doepfer A-127 Triple VCRF: formants
Unit 7 Doepfer VCRF: adding motion
Unit 8 Rossum Evolution: overview
Unit 9 Rossum Evolution: Genus
Unit 10 Rossum Evolution: Q/resonance
Unit 11 Rossum Evolution: Species
Unit 12 Verbos Bark Filter: basic operation
Unit 13 Verbos Bark Filter: voltage control
Unit 14 Verbos Bark Filter: vocoding
Unit 15 Verbos Bark Filter: envelope followers
Unit 16 Modcan Multimode Filter: overview
Unit 17 Modcan Multimode Filter: details
Unit 18 Gotharman CS Filter: overview
Unit 19 Gotharman CS Filter: detailed exploration
Unit 20 Rossum Morpheus Digital Filter: overview + enveloped
Unit 21 Rossum Morpheus: drones
Unit 22 Rossum Morpheus: stereo drum loops
Unit 23 Rossum Morpheus: editing
Unit 24 Doepfer A-106-6 XP Filter: overview
Unit 25 Doepfer A-106-6: LP, BP, and resonance
Unit 26 Doepfer A-106-6: bandpass variations
Unit 27 Doepfer A-106-6: notch & all pass modes
Unit 28 Doepfer A-101-1 Vactrol "Steiner" Filter: overview
Unit 29 Doepfer A-101-1: exploring multiple inputs
Unit 30 WMD SSF Multi Mode Filter 1/2: sound characteristics
Unit 31 WMD SSF MMF 2/2: Pinging
Module 5 Waveshapers and Other Sound Modifiers
Unit 1 Patching in a sound modifier
Unit 2 Random*Source Serge Wave Multipliers
Unit 3 RS Wave Multipliers: wavefolding
Unit 4 RS Wave Multipliers: full wave rectifiers
Unit 5 AJH Synth Ring SM: overview + mixer
Unit 6 AJH Ring SM: sub bass
Unit 7 AJH Ring SM: ring modulation
Unit 8 Happy Nerding Super Sawtor
Unit 9 Doepfer A-113 Subharmonic Generator: overview
Unit 10 Doepfer A-113: subharmonic mixtures
Unit 11 Doepfer A-113: complex modulation & triggers
Unit 12 Abstract Data ADE-10: overview + input
Unit 13 Abstract Data ADE-10: vertical shaper
Unit 14 Abstract Data ADE-10: wave folder
Unit 15 Abstract Data ADE-10: feedback
Unit 16 Happy Nerding FM Aid
Unit 17 Bastl Timber waveshaper
Module 6 Envelopes, LFOs, and Other Mod Sources
Unit 1 Adding a different mod source
Unit 2 WMD MultiMode Envelope + Expander
Unit 3 WMD MME: envelope shapes
Unit 4 WMD MME: envelope modes
Unit 5 WMD MME: voltage control + expander
Unit 6 IME Kermit Dual Modulation Aid: overview
Unit 7 IME Kermit: voltage control & cross-modulation
Unit 8 IME Kermit: tap tempo
Unit 9 IME Kermit: lo-fi VCO
Unit 10 Sputnik West Coast Random Source: overview
Unit 11 Sputnik WCRS: fluctuating random
Unit 12 Sputnik WCRS: quantized & stored random
Unit 13 Sputnik WCRS: switch + sample & hold
Unit 14 Frap Tools SAPÈL: demo + overview
Unit 15 Frap Tools SAPÈL: quantized random voltages
Unit 16 Frap Tools SAPÈL: fluctuating + probability
Unit 17 Frap Tools SAPÈL: gates & clocks
Unit 18 SSF Ultra-Random Analog: overview
Unit 19 SSF URA: Sample & Holds
Unit 20 SSF URA: Random Gates + Opto Integrator
Unit 21 SSF URA: Random Flux
Unit 22 SSF URA: Audio Rate Clock Tricks
Unit 23 nonlinearcircuits Sly Grogan
Unit 24 Erogenous Tones RADAR 1/4: overview
Unit 25 ET RADAR 2/4: channel controls
Unit 26 ET RADAR 3/4: Quadrature mode
Unit 27 ET RADAR 4/4: BLiP expander
Unit 28 Cosmotronic Delta-V 1/2: Envelopes & LFOs
Unit 29 Delta-V 2/2: using its VCAs
Unit 30 Frap Tools Falistri Movement Manager 1/4: Overview & Basic Envelopes
Unit 31 Falistri 2/4: Advanced Envelope Tricks
Unit 32 Falistri 3/4: LFO
Unit 33 Falistri 4/4: VCO
Module 7 Level Control: Amplifiers, Mixers, and LPGs
Unit 1 Patching in another mixer or VCA
Unit 2 STG Soundlabs .mix
Unit 3 Verbos Scan & Pan: overview
Unit 4 Verbos Scan & Pan: VC panning
Unit 5 Verbos Scan & Pan: scanning inputs
Unit 6 Lifeforms Dynamic Impulse Filter LPG
Unit 7 Lifeforms DIF: melodic uses
Unit 8 Lifeforms DIF: "Buchla bongos"
Unit 9 Lifeforms DIF: processing percussion
Unit 10 SSF Mixmode: overview
Unit 11 SSF Mixmode: saturation
Unit 12 SSF Mixmode: Expander
Unit 13 SSF Mixmode: percussion overdrive
Unit 14 WMD Digital VCA: de-clicking attacks
Unit 15 WMD Digital VCA 2/2: sample & hold
Unit 16 Roland 530 Dual VCA: overview
Unit 17 Roland 530 VCA: linear vs. exponential
Unit 18 Happy Nerding 3x VCA: overview, mixing, & enveloping
Unit 19 Happy Nerding 3x VCA: mod depth, tremolo, & autopan
Unit 20 Frap Tools 321: utility mixer applications  - Preview
Unit 21 Verbos Amplitude & Tone Controller 1/3: Overview; Input Gain & Resonance
Unit 22 Verbos ATC 2/3: LPGs, Vactrols, & Percussion
Unit 23 Verbos ATC 3/3: AM & FM
Unit 24 Trogotronic m/277 Tube VCA 1/5: overview
Unit 25 Trogotronic m/277 2/5: output processing
Unit 26 Trogotronic m/277 3/5: stereo processing
Unit 27 Trogotronic m/277 4/5: as a VCA
Unit 28 Trogotronic m/277 5/5: VCA before VCF
Unit 29 Metasonix RK5 Dual Low Pass Gate 1/3: overview
Unit 30 Metasonix RK5 2/3: Decay Behavior
Unit 31 Metasonix RK5 3/3: CV
Unit 32 Plankton Nutone dual tube VCA 1/2: introduction
Unit 33 Nutone VCA 2/2: in use
Module 8 Effects Modules
Unit 1 Patching in and controlling modular effects
Unit 2 Roland 572: phase shifter
Unit 3 Roland 572: analog delay + chorus
Unit 4 Roland 572: gate delay
Unit 5 WMD/SSF DPLR VC Delay: overview
Unit 6 WMD/SSF DPLR: interactive performance
Unit 7 Synthrotek Verb: low-fi reverb
Unit 8 Synthrotek Verb: modulated resonator
Module 9 Multi-Purpose Modules
Unit 1 Random*Source Serge Dual Universal Slope Generator 1/7: overview & slew
Unit 2 DUSG 2/7: envelope generator
Unit 3 DUSG 3/7: LFOs
Unit 4 DUSG 4/7: VCOs
Unit 5 DUSG 5/7: subharmonic generator
Unit 6 DUSG 6/7: waveshaper
Unit 7 DUSG 7/7: envelope follower

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