AudioFuAudioFu Chart · October 2026
Best Interface Modules for Intermediate 2026
The top pick is Befaco InAmp Eurorack Synthesizer Module ($144). Doepfer A-119 Ext.In External Input / Envelope Follower gives you the most for the money at $88. Expert Sleepers Disting MK4 Multifunction Eurorack Synth Module leads the high end. Ranked by the AudioFu Index from 66 models across 19 brands, prices checked every night.
Last updated: October 15, 2026
Top 10
Full detail for the 10 highest AudioFu Index scores. Every other model is listed below.
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The Befaco InAmp is a really handy little module for bringing in external sounds – think guitars, drum machines, or other synths – into your Eurorack system. It's perfect for those wanting a clean, simple way to interface external gear, especially if you're on a budget and need to save space. The normalization is a nice touch for straightforward routing.
Pros
- Solid build quality with robust metal chassis and tight tolerances
- Flexible dual input design excels with varied signal sources
- Normalization offers a clean, simple signal chain option
Cons
- 3.5mm jacks feel a bit flimsy compared to higher-end options
- Gain range could be wider for extremely quiet or hot signals
72AudioFu
IndexStableno change since Aug 14Aug 14$144 now$144€129 at Thomann · in stockCheck price ↗ -
Doepfer A-119 Ext.In External Input / Envelope Follower
A-119 VE · Doepfer
14 for sale on Reverb2 finishes at Thomann
The A-119 VE is a no-frills, dependable envelope follower, perfect for triggering drums or modulating parameters based on external audio. It's a great entry point into modular processing and a budget-friendly way to add rhythmic complexity to your system, particularly useful for experimental electronic music or sound design.
Pros
- Excellent envelope following for precise rhythmic control
- Robust Doepfer build quality; feels very solid and reliable
- Compact 8HP footprint saves valuable space in a modular rack
Cons
- Limited input gain adjustment restricts dynamic range handling
- Basic functionality; lacks advanced features like multiple response modes
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Expert Sleepers Disting MK4 Multifunction Eurorack Synth Module
Disting mk4 · Expert Sleepers
11 for sale on Reverb1 finish at Thomann
The Disting mk4 is a powerhouse in a tiny package. It’s a fantastic choice for experimental musicians, sound designers, and anyone wanting a modular swiss army knife for complex sound manipulation and sequencing—just be prepared to invest some time learning its intricacies.
Pros
- Incredibly dense feature set for its size, a true Swiss Army knife.
- Micro SD card slot unlocks a vast library of sample possibilities.
- Dot matrix display is surprisingly readable and functional for navigation.
Cons
- 4HP footprint demands careful patching and planning in smaller racks.
- Steep learning curve due to the sheer number of algorithms available.
70AudioFu
IndexStableno change since Aug 14Aug 14$208 now$208€186 at Thomann · in stockCheck price ↗ -
Doepfer A-190-4 USB / MIDI to CV / Gate / Sync Interface
A-190-4 · Doepfer
9 for sale on Reverb1 finish at Thomann
The A-190-4 is a workhorse for anyone diving into Eurorack. It's a reliable bridge between your computer and your modular, offering straightforward MIDI-to-CV conversion and clocking. Perfect for beginners and experienced users alike who need a dependable, no-frills interface.
Pros
- Rock-solid Doepfer build quality; feels exceptionally durable.
- Clear, easily readable LED display for precise parameter adjustments.
- Comprehensive MIDI implementation; handles multiple MIDI channels effectively.
Cons
- Limited resolution on CV outputs; not ideal for ultra-fine control.
- Power consumption is relatively high for a simple interface module.
68AudioFu
IndexStableno change since Aug 14Aug 14$207 now$207€185 at Thomann · in stockCheck price ↗ -
Doepfer A-190-3 USB / MIDI CV / Gate Interface
A-190-3 · Doepfer
4 for sale on Reverb2 finishes at Thomann
The A-190-3 is a solid, no-frills MIDI-CV interface for Doepfer and Eurorack systems. It's perfect for those wanting straightforward integration without complex routing or advanced modulation capabilities – a great entry point into modular MIDI control. It's a workhorse for getting your modular synths playing along with your computer or other MIDI gear.
Pros
- Robust Doepfer build quality ensures long-term reliability.
- Provides essential MIDI-to-CV conversion for modular integration.
- Four CV outputs offer flexibility for multiple modules.
Cons
- Limited resolution compared to more modern MIDI-CV interfaces.
- No velocity or aftertouch support – purely note and gate.
67AudioFu
IndexStableno change since Aug 14Aug 14$140 now$140€125 at Thomann · in stockCheck price ↗ -
The XOH is a remarkably clean and compact stereo output solution for your modular system. It's ideal for anyone needing a reliable way to send your complex synth creations to external speakers or headphones without introducing noise or distortion—especially great for live performance or studio recording where signal integrity is key.
Pros
- Excellent stereo imaging, noticeably wider than typical Eurorack outputs
- Headphone output provides a surprisingly clean and powerful signal
- Compact 6HP footprint maximizes space in tight modular systems
Cons
- Limited routing options beyond simple level adjustments
- 3.5mm jacks can feel a bit fragile with repeated use
65AudioFu
IndexStableno change since Aug 14Aug 14$144 now$144€129 at Thomann · in stockCheck price ↗ -
Expert Sleepers Little Mikey Preamp Eurorack Synth Module
Little Mikey · Expert Sleepers
6 for sale on Reverb1 finish at Thomann
The Little Mikey is a seriously useful little module for anyone needing a clean, flexible preamp in their Eurorack. It's a great way to bring in external signals – vocals, guitars, even vintage synths – without muddying your sound, and the gain range is surprisingly generous. Perfect for modular experimenters and those wanting a dedicated, compact preamp.
Pros
- Excellent gain staging flexibility with the -20dB pad
- Clean, transparent preamplification with minimal coloration
- Hi-Z input handles guitars and other instruments exceptionally well
Cons
- 3.5mm output jacks feel a bit fragile for frequent use
- Limited input options compared to more expansive preamps
62AudioFu
IndexStableno change since Aug 14Aug 14$189 now$189€169 at Thomann · in stockCheck price ↗ -
Expert Sleepers ES-6 MK3 CV / Lightpipe Interface Eurorack Synth…
ES-6 mk3 · Expert Sleepers
3 for sale on Reverb1 finish at Thomann
The ES-6 mk3 is a workhorse for getting your analog control voltages into a digital audio workstation. It's a brilliant, compact solution for anyone wanting to integrate modular synths with computer-based sequencing and effects, especially useful for live performance or detailed studio work.
Pros
- DC-coupled CV inputs allow for true control voltage ranges
- Excellent 103dB SNR ensures clean, noise-free ADAT conversion
- Compact 4HP footprint maximizes space in dense modular racks
Cons
- Limited to six CV channels; may not suit larger, complex setups
- ADAT output is digital only; no analog output options available
57AudioFu
Index↓ 5.9%since Aug 14 · lowest so far$189 · Aug 14$178 now$178€159 at Thomann · in stockCheck price ↗ -
The A-190-8 is a no-frills, dependable way to sync your Doepfer modules to external MIDI or USB clock sources. It's ideal for those who want straightforward clocking without a lot of extra complexity—perfect for a minimalist Eurorack environment or a first modular system.
Pros
- Reliable Doepfer build quality ensures long-term stability.
- Simple, direct MIDI clock synchronization for modular setups.
- Compact 6HP footprint conserves valuable rack space.
Cons
- Limited functionality beyond basic clock/start/stop signals.
- Requires a power supply capable of providing both +12V and -12V.
55AudioFu
IndexStableno change since Aug 14Aug 14$140 now$140€125 at Thomann · in stockCheck price ↗ -
The Befaco 1U Out is a really clever solution for Eurorack users who need a simple audio interface. It's perfect for those who want to record external signals, monitor with headphones, or just route audio without cluttering up their rack with a full-blown mixer. It’s a no-frills, compact, and reliable option.
Pros
- Compact 1U form factor maximizes precious modular space.
- Stereo input allows for easy integration of external audio sources.
- Dedicated headphone output with volume control enables private monitoring.
Cons
- 3.5mm jacks feel slightly less premium than standard 6.35mm connectors.
- Power consumption, while reasonable, can impact smaller power supplies.
All 66 interface modules
Same index, same nightly prices — compact. Colour options of one model share a row. Tap a photo to zoom.
- 11
Intellijel Designs Pedal I/O 1U V2Intellijel Designs50Stable$115€103$115€103Check ↗
- 12
Intellijel Designs OutsIntellijel Designs50Stable$188€168$188€168Check ↗
- 13
Doepfer A-192-2Doepfer49Stable$144€129$144€129Check ↗
- 14
Befaco Output V3Befaco48Stable$161€144$161€144Check ↗
- 15
4ms Percussion Interface + Exp.4ms46↓ 3.6%$178€159$178€159Check ↗
- 16
NANO Modules ST-OUTNANO Modules43Stable$151€135$151€135Check ↗
- 17
NANO Modules ST-INNANO Modules43Stable$151€135$151€135Check ↗
- 18
ADDAC 710 Balanced OutputsADDAC43↑ 5.7%$207€185$207€185Check ↗
- 19
vpme.de trig31vpme.de42↓ 2.9%$151€135$151€135Check ↗
- 20
Strymon AA1 Level ShifterStrymon42↓ 2.1%$154€138$154€138Check ↗
- 21
Erica Synths Pico OutputErica Synths41Stable$106€95$106€95Check ↗
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ADDAC 200PI Pedal IntegratorADDAC41↑ 9.5%$129€115$129€115Check ↗
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4ms Listen IO4ms40↑ 7.8%$156€139$156€139Check ↗
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Intellijel Designs Stereo Out 1UIntellijel Designs50Stable$87€78$87€78Check ↗
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Intellijel Designs Headphones 1UIntellijel Designs50Stable$87€78$87€78Check ↗
- 26
Befaco 1U STAmpBefaco48Stable$88€79$88€79Check ↗
- 27
Expert Sleepers ES-8 USB Audio Interface Eurorack Synth ModuleES-8 · Expert Sleepers82↓ 2.0%$559€499$559€499Check ↗
- 28
Intellijel Designs Stereo Line In 1UIntellijel Designs50Stable$83€74$83€74Check ↗
- 29
ADDAC 309 CV to ExpressionADDAC46Stable$84€75$84€75Check ↗
- 30
Expert Sleepers Super Disting EX Plus A Multi-Function Eurorack Synth…Disting NT · Expert Sleepers75Stable$781€698$781€698Check ↗
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Doepfer A-119-2Doepfer49Stable$73€65$73€65Check ↗
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Doepfer A-190-7 1UDoepfer49Stable$72€64$72€64Check ↗
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Behringer Perfect Pitch PP1 Eurorack ModulePerfect Pitch PP1 · Behringer42↓ 3.9%$83€74$83€74Check ↗
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Doepfer A-139-2 Headphone AmplifierDoepfer49Stable$66€59$66€59Check ↗
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Expert Sleepers FH-2 Factotum MIDI / CV Converter Eurorack Synth…FH-2 · Expert Sleepers71Stable$349€312$349€312Check ↗
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Behringer Cu1ABehringer53↓ 44.7%$53€47$53€47Check ↗
- 37
Expert Sleepers ES-9 USB Interface Eurorack Synth ModuleES-9 · Expert Sleepers66Stable$692€618$692€618Check ↗
- 38
4MS Meta ModuleMeta Module · 4ms66Stable$704€629$704€629Check ↗
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Rides In The Storm CONRides In The Storm36↑ 10.2%$73€65$73€65Check ↗
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Joranalogue Audio Design Receive 2Joranalogue Audio Design60Stable$210€188$210€188Check ↗
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Joranalogue Audio Design Transmit 2Joranalogue Audio Design60Stable$218€195$218€195Check ↗
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Intellijel Designs Line Out 1UIntellijel Designs50Stable$44€39$44€39Check ↗
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Doepfer A-190-5 Polyphonic USB / MIDI to CV / Gate InterfaceA-190-5 · Doepfer58Stable$335€299$335€299Check ↗
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Befaco CV Thing Eurorack Synthesizer ModuleCV Thing · Befaco57Stable$279€249$279€249Check ↗
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Behringer CM1A MIDI to CV Eurorack ModuleCM1A · Behringer47↓ 2.5%$44€39$44€39Check ↗
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Xaoc Devices Sewastopol II Audio Port & Voltage ExpanderSewastopol II · XAOC Devices56Stable$290€259$290€259Check ↗
- 47
Frap Tools CGM Creative Mixer Series - M one MasteroneCGM Masterone · Frap Tools55Stable$353€315$353€315Check ↗
- 48
Intellijel Designs Pedal I/O JACKS 1UIntellijel Designs50Stable$27€24$27€24Check ↗
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Intellijel Designs StompIntellijel Designs50Stable$234€209$234€209Check ↗
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Intellijel Designs Stereo I/O 1UIntellijel Designs50Stable$241€215$241€215Check ↗
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Intellijel Designs MIDI 1UIntellijel Designs50Stable$255€228$255€228Check ↗
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BASTL Instruments 1983 Polyphonic MIDI to CV Interface1983 · Bastl Instruments50Stable$256€229$256€229Check ↗
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Intellijel Designs uMIDIIntellijel Designs50Stable$274€245$274€245Check ↗
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Intellijel Designs Audio I/O (2023)Intellijel Designs50Stable$312€279$312€279Check ↗
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Befaco MIDI Thing V2 Eurorack Synthesizer ModuleMIDI Thing V2 · Befaco49Stable$357€319$357€319Check ↗
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Expert Sleepers NTX-8CVExpert Sleepers48Stable$223€199$223€199Check ↗
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Befaco I4 Instrument InterfaceBefaco48Stable$263€235$263€235Check ↗
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Befaco VCMCBefaco48Stable$373€333$373€333Check ↗
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Expert Sleepers ES-10Expert Sleepers48Stable$402€359$402€359Check ↗
- 60
Vermona Modular qMI2 - quad Midi interfaceVermona Modular45↓ 0.8%$409€365$409€365Check ↗
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Vermona Modular Twin OutVermona Modular44Stable$290€259$290€259Check ↗
- 62
Vermona Modular TAI-4Vermona Modular44Stable$412€368$412€368Check ↗
- 63
XAOC Devices Drezno IIXAOC Devices43Stable$308€275$308€275Check ↗
- 64
Hexinverter Électronique Mutant BrainHexinverter Électronique41Stable$233€208$233€208Check ↗
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ADDAC 220 Dual Envelope Follower+ADDAC41↑ 10.2%$413€369$413€369Check ↗
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ADDAC 711 Balanced InputsADDAC40↑ 12.0%$312€279$312€279Check ↗
Interface Modules by the numbers
Measured across all 68 models we track, not a sample.
Median $188 — half of all interface modules here cost less.
How to choose the best interface modules
Routing Complexity
Intermediate players are starting to use more complex modulation schemes and need flexible routing options - multiple VCAs, mixers with attenuverters, and patch matrices are key. A module that's just a simple gain stage won't cut it anymore.
Hands-On Control
Forget just knobs; look for modules with assignable encoders, touchplates, or even mini-sequencers. The ability to tweak sounds in real-time during a performance or recording session is invaluable.
Noise Floor
A clean signal path is paramount. Even subtle noise can muddy a complex patch, especially when you're layering multiple oscillators and effects. Lower noise floor is always better, especially for quieter sounds.
Input/Output Flexibility
Having multiple inputs and outputs, with different impedance options, lets you interface with a wider range of gear, from vintage synths to modern drum machines. It's about versatility and adapting to different recording and live situations.
Build Quality & Ergonomics
Let's be honest, flimsy pots and awkward layouts are frustrating. You want something that feels solid, inspires confidence, and doesn't fight against your workflow. That cheap plastic casing might save a few bucks, but it'll cost you in frustration.
Buying guide
So, you've been patching Eurorack for a while, you're beyond the "blink and dazzle" phase, and you're realizing your modular's signal flow is a tangled mess. Interface modules aren't just for beginners; they're essential for serious patching. They're the unsung heroes of a complex system, keeping things organized and letting you actually hear what you're doing, not just chasing phantom noises. Let's talk about what intermediate players need to look for.
At this level, you're paying for usability, not just features. Don't fall for modules that promise the moon but are a pain to patch. A well-designed interface module will actually save you time and improve your sound, even if it costs a bit more upfront.
Watch out for modules with limited routing options or a noisy signal path - those are the corners that get cut.
How the AudioFu Index works
Five measured signals and nothing else — no stars from strangers, no “tested by experts” we didn’t do. The weights are fixed and public. We don’t play these instruments; we measure the market around them.
This chart covers 68 interface modules from the Thomann catalogue. Before you buy, read hands-on reviews and, where you can, play it. Full methodology.
AudioFu earns a commission when you buy through our Thomann links. It never changes the order — the index does.
- Demand40%
How many of this exact model are for sale on Reverb right now — what musicians actually buy and resell.
- Lineup20%
How many finishes Thomann stocks — makers expand the models that sell.
- Price15%
Where the price has moved since we started tracking in August.
- Specs15%
How completely the maker documents it.
- Maker10%
How deep the brand’s range is in this category.
Questions
What's the difference between a mixer and a patch matrix?
A mixer combines signals; a patch matrix lets you route signals between different points in your modular. You'll often want both, but a mixer is usually the more essential starting point.
How important is voltage control?
For an intermediate player, VCAs and VC Os are crucial for dynamic and evolving sounds. Static patching gets boring fast.
Can I get away with a cheap interface module?
You can, but be prepared for a noisy signal and limited functionality. It's often cheaper to buy something decent to begin with than to replace it later.
What's a good size for an interface module?
Ideally, something that fits comfortably in your rack without taking up too much space. 8-12 HP is a sweet spot for a versatile interface module.
How do I know if a module has a 'clean' signal path?
Listen for it! Patch a sine wave through the module and record it. If you hear any noticeable hiss or hum, it's likely noisy. Reviews and forums often discuss noise performance too.
