AudioFuAudioFu Chart · October 2026
Best Interface Modules for Professional 2026
The top pick is Expert Sleepers Super Disting EX Plus A Multi-Function Eurorack Synth… ($781). Expert Sleepers ES-8 USB Audio Interface Eurorack Synth Module gives you the most for the money at $559. 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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Expert Sleepers Super Disting EX Plus A Multi-Function Eurorack Synth…
Disting NT · Expert Sleepers
17 for sale on Reverb1 finish at Thomann
The Disting NT is a powerhouse of a module, essentially a miniature, programmable synthesizer in Eurorack format. It's perfect for experienced modular users or sound designers who want a truly versatile and deep signal processing engine, but be prepared to dig in – it's not a beginner's module.
Pros
- Incredible algorithm depth provides limitless sound design possibilities.
- DC-coupled CV connections enable complex modulation routing and experimentation.
- MicroSD card playback offers a unique, self-contained performance tool.
Cons
- Steep learning curve; requires significant time investment to master functionality.
- 22HP footprint can be restrictive in smaller modular systems.
75AudioFu
IndexStableno change since Aug 14Aug 14$781 now$781€698 at Thomann · in stockCheck price ↗ -
The 4ms Meta Module is a brilliant bridge between the physical and digital worlds of modular synthesis. It’s a fantastic entry point for those wanting to explore a vast library of virtual modules without a huge investment, and a powerful expansion tool for experienced users looking to augment their existing hardware. If you're already in the VCV Rack ecosystem, or are curious about it, this is a game-changer.
Pros
- Seamless VCV Rack integration expands sonic possibilities significantly.
- Rotary controls offer surprisingly nuanced parameter tweaking.
- Pre-installed module library provides immediate creative exploration.
Cons
- Reliance on software means no purely analog standalone operation.
- Limited RAM might restrict very large, complex patch deployments.
66AudioFu
IndexStableno change since Aug 14Aug 14$704 now$704€629 at Thomann · in stockCheck price ↗ -
Expert Sleepers ES-9 USB Interface Eurorack Synth Module
ES-9 · Expert Sleepers
8 for sale on Reverb1 finish at Thomann
The ES-9 is a serious workhorse for modular synth enthusiasts. Its rock-solid USB connectivity and DC-coupled signals make it ideal for complex patching and live performance – if you're running a serious modular rig and need reliable, low-latency audio, this is a must-have.
Pros
- Rock-solid USB performance, crucial for live modular patching.
- DC-coupled audio/CV signals unlock advanced modulation possibilities.
- Flexible I/O configuration handles complex routing scenarios.
Cons
- Requires optional MIDI breakout for full MIDI functionality.
- Limited operating system support might exclude some users.
66AudioFu
IndexStableno change since Aug 14Aug 14$692 now$692€618 at Thomann · in stockCheck price ↗ -
Expert Sleepers ES-8 USB Audio Interface Eurorack Synth Module
ES-8 · Expert Sleepers
26 for sale on Reverb1 finish at Thomann
The ES-8 is a seriously powerful little module, perfect for modular enthusiasts who need a reliable and flexible audio interface. It’s a game-changer for integrating sample playback and external audio sources into your patch, especially if you're already deep into software CV generation like Max/MSP or Reaktor.
Pros
- DC-coupled I/O allows for true CV control and manipulation.
- ADAT input/output expands routing and recording possibilities significantly.
- Class-compliant operation simplifies setup and eliminates driver headaches.
Cons
- Power draw is relatively high, demanding a capable PSU.
- 3.5mm mini-jack connections can feel a bit flimsy over time.
82AudioFu
Index↓ 2.0%since Aug 14 · lowest so far$570 · Aug 14$559 now$559€499 at Thomann · in stockCheck price ↗ -
The ES-10 is a game-changer for modular users needing to bridge digital ADAT devices to the analog world. It’s incredibly clean sounding thanks to those AKM converters and its compact size makes it ideal for smaller or space-constrained racks—perfect for anyone recording external synths or integrating ADAT-based instruments into their modular system.
Pros
- Exceptional AKM 'Velvet Sound' converters deliver pristine audio fidelity.
- Compact 12HP footprint maximizes valuable modular space.
- Flexible input/output configuration caters to diverse signal types.
Cons
- Mini-jack connections can be fragile with heavy patching.
- Power draw requires a robust PSU, especially when expanded.
48AudioFu
IndexStableno change since Aug 14Aug 14$402 now$402€359 at Thomann · in stockCheck price ↗ -
The qMI2 is a seriously useful module for anyone building a Eurorack system and needing to integrate MIDI control. It’s a well-built, no-frills solution for translating MIDI data into modular signals, and the clock division is a huge bonus for creating complex rhythms. Ideal for experimental musicians and those wanting precise control over multiple modular destinations.
Pros
- Robust Vermona build quality; feels solid and reliable.
- Four fully independent CV/Gate channels offer excellent routing flexibility.
- Clock division provides intricate rhythmic possibilities within your modular system.
Cons
- MIDI channel selection lacks individual per-channel assignment.
- Limited modulation options beyond basic CV/Gate signals.
45AudioFu
Index↓ 0.8%since Aug 14 · lowest so far$412 · Aug 14$409 now$409€365 at Thomann · in stockCheck price ↗ -
The Vermona TAI-4 is a solid, no-nonsense interface for your modular rig. That transformer coloration is a nice touch for adding some analog vibe, and the multiple gain settings give you great control. This is perfect for anyone needing a clean and reliable way to get audio in and out of their modular system, especially those working with vintage gear or needing a bit of extra isolation.
Pros
- Galvanic isolation protects against ground loops and noise
- Transformer provides a subtle warmth to the signal
- Multiple attenuation options offer precise gain staging
Cons
- 14HP footprint can be restrictive in smaller modular systems
- Limited to two channels; lacks expandability for complex setups
44AudioFu
IndexStableno change since Aug 14Aug 14$412 now$412€368 at Thomann · in stockCheck price ↗ -
The ADDAC 220 is a seriously useful module for anyone wanting to extract rhythmic or dynamic information from audio sources. Its analog front-end adds a pleasing character, and the CV options let you modulate other modules based on the input signal’s envelope – perfect for experimental sound design or adding movement to drones and sequences.
Pros
- Analog input stage provides warmth and musicality to the followed signal.
- Flexible response curve (log to exp) offers nuanced envelope shaping.
- Dual channel operation allows for complex stereo processing and creative routing.
Cons
- 10HP footprint can be restrictive in smaller modular systems.
- Limited input headroom; may clip with very hot signals without careful gain staging.
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The Befaco VCMC is a seriously powerful and flexible MIDI interface for your modular system. It's a dream for performers who want hands-on control over multiple synth voices or effects simultaneously, and the recall functions are a huge time-saver. If you’re building a performance-focused modular rig, this is a vital piece.
Pros
- Eight faders offer precise, nuanced control over multiple parameters
- Button assignments provide tactile, immediate modulation options
- Excellent recall functionality preserves complex performance setups
Cons
- 20HP width can be restrictive in smaller Eurorack cases
- Limited display makes parameter tweaking somewhat less intuitive
48AudioFu
IndexStableno change since Aug 14Aug 14$373 now$373€333 at Thomann · in stockCheck price ↗ -
Befaco MIDI Thing V2 Eurorack Synthesizer Module
MIDI Thing V2 · Befaco
2 for sale on Reverb1 finish at Thomann
The MIDI Thing V2 is a powerhouse for serious modular users. Its 12 outputs and flexible routing options unlock incredibly complex control possibilities, and the web editor makes tweaking a breeze. It’s perfect for those who need to translate intricate MIDI data into nuanced modulation for their Eurorack systems.
Pros
- 12 outputs offer unparalleled routing flexibility for complex modular setups.
- Web editor simplifies configuration, eliminating frustrating menu diving.
- Robust OLED display provides clear, at-a-glance parameter information.
Cons
- The included expander cable feels a bit flimsy for frequent use.
- Configuration can be overwhelming for beginners without modular experience.
49AudioFu
IndexStableno change since Aug 14Aug 14$357 now$357€319 at Thomann · in stockCheck price ↗
All 66 interface modules
Same index, same nightly prices — compact. Colour options of one model share a row. Tap a photo to zoom.
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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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Expert Sleepers Disting MK4 Multifunction Eurorack Synth ModuleDisting mk4 · Expert Sleepers70Stable$208€186$208€186Check ↗
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Doepfer A-190-4 USB / MIDI to CV / Gate / Sync InterfaceA-190-4 · Doepfer68Stable$207€185$207€185Check ↗
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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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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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Expert Sleepers Little Mikey Preamp Eurorack Synth ModuleLittle Mikey · Expert Sleepers62Stable$189€169$189€169Check ↗
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Xaoc Devices Sewastopol II Audio Port & Voltage ExpanderSewastopol II · XAOC Devices56Stable$290€259$290€259Check ↗
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Frap Tools CGM Creative Mixer Series - M one MasteroneCGM Masterone · Frap Tools55Stable$353€315$353€315Check ↗
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Befaco InAmp Eurorack Synthesizer ModuleInAmp · Befaco72Stable$144€129$144€129Check ↗
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Doepfer A-190-3 USB / MIDI CV / Gate InterfaceA-190-3 Vintage Edition · Doepfer · 2 finishes67Stable$156€139$156€139Check ↗
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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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Expert Sleepers ES-6 MK3 CV / Lightpipe Interface Eurorack Synth…ES-6 mk3 · Expert Sleepers57↓ 5.9%$178€159$178€159Check ↗
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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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Make Noise XOH ModuleXOH · Make Noise65Stable$144€129$144€129Check ↗
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Intellijel Designs OutsIntellijel Designs50Stable$188€168$188€168Check ↗
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Vermona Modular Twin OutVermona Modular44Stable$290€259$290€259Check ↗
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XAOC Devices Drezno IIXAOC Devices43Stable$308€275$308€275Check ↗
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ADDAC 710 Balanced OutputsADDAC43↑ 5.7%$207€185$207€185Check ↗
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Hexinverter Électronique Mutant BrainHexinverter Électronique41Stable$233€208$233€208Check ↗
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ADDAC 711 Balanced InputsADDAC40↑ 12.0%$312€279$312€279Check ↗
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4ms Percussion Interface + Exp.4ms46↓ 3.6%$178€159$178€159Check ↗
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Doepfer A-190-8 USB / MIDI Sync InterfaceA-190-8 · Doepfer55Stable$140€125$140€125Check ↗
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Befaco Output V3Befaco48Stable$161€144$161€144Check ↗
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Doepfer A-192-2Doepfer49Stable$144€129$144€129Check ↗
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NANO Modules ST-OUTNANO Modules43Stable$151€135$151€135Check ↗
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NANO Modules ST-INNANO Modules43Stable$151€135$151€135Check ↗
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Strymon AA1 Level ShifterStrymon42↓ 2.1%$154€138$154€138Check ↗
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vpme.de trig31vpme.de42↓ 2.9%$151€135$151€135Check ↗
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4ms Listen IO4ms40↑ 7.8%$156€139$156€139Check ↗
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Intellijel Designs Pedal I/O 1U V2Intellijel Designs50Stable$115€103$115€103Check ↗
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ADDAC 200PI Pedal IntegratorADDAC41↑ 9.5%$129€115$129€115Check ↗
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Erica Synths Pico OutputErica Synths41Stable$106€95$106€95Check ↗
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Doepfer A-119 Ext.In External Input / Envelope FollowerA-119 · Doepfer · 2 finishes82Stable$84€75$84€75Check ↗
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Befaco Out 1U Eurorack Synthesizer Module1U Out · Befaco54Stable$100€89$100€89Check ↗
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Behringer Cu1ABehringer53↓ 44.7%$53€47$53€47Check ↗
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Intellijel Designs Pedal I/O JACKS 1UIntellijel Designs50Stable$27€24$27€24Check ↗
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Intellijel Designs Line Out 1UIntellijel Designs50Stable$44€39$44€39Check ↗
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Intellijel Designs Stereo Line In 1UIntellijel Designs50Stable$83€74$83€74Check ↗
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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 ↗
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Doepfer A-139-2 Headphone AmplifierDoepfer49Stable$66€59$66€59Check ↗
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Doepfer A-190-7 1UDoepfer49Stable$72€64$72€64Check ↗
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Doepfer A-119-2Doepfer49Stable$73€65$73€65Check ↗
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Befaco 1U STAmpBefaco48Stable$88€79$88€79Check ↗
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Behringer CM1A MIDI to CV Eurorack ModuleCM1A · Behringer47↓ 2.5%$44€39$44€39Check ↗
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ADDAC 309 CV to ExpressionADDAC46Stable$84€75$84€75Check ↗
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Behringer Perfect Pitch PP1 Eurorack ModulePerfect Pitch PP1 · Behringer42↓ 3.9%$83€74$83€74Check ↗
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Rides In The Storm CONRides In The Storm36↑ 10.2%$73€65$73€65Check ↗
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
Latency
This is non-negotiable. A pro needs near-zero latency for real-time tweaking and performance. Anything over 10ms is noticeable and disruptive, especially when playing keys or sequencing complex rhythms. That's a dealbreaker for live work.
Dynamic Range & Noise Floor
You're building intricate soundscapes; you don't want them buried under hiss or clipping. A clean, wide dynamic range allows for subtle detail and powerful peaks without sacrificing headroom. It's the difference between a polished recording and a muddy mess.
Routing Flexibility
We need more than just left and right out. Multiple outputs for sends, aux returns, and dedicated monitoring are crucial. Patching options for signal manipulation within the interface itself are a massive bonus for creative workflows.
Build Quality & Reliability
These are investments. Cheap pots, flaky connectors, and flimsy construction won't survive the rigors of gigging and studio use. Solid build quality translates to peace of mind and fewer headaches down the line.
Driver Stability & Compatibility
A fantastic-sounding interface is useless if it crashes mid-performance. Rock-solid drivers and broad OS compatibility are paramount for reliable operation, especially when you're relying on it for critical tracks.
Buying guide
Alright, so you're deep into modular, past the blinking lights and happy accidents, and you're realizing your Eurorack case is screaming for a proper interface module. These aren't just about getting audio out; they're about seamless integration, reliable performance, and having enough headroom to actually hear your complex patches. Forget those cheap, noisy USB adapters - we're talking serious tools for serious synth heads.
Don't chase features you won't use. Those extra outputs are great, but if you're primarily recording solo, a simpler, cleaner module might be a better investment. Watch out for modules that advertise high sample rates but cut corners on analog components - that's just noise masquerading as resolution.
Paying extra for a module with a proven track record and a reputation for transparency is almost always worth it; your ears will thank you.
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 simple audio interface and a dedicated interface module?
A simple interface is usually designed for broad compatibility. Interface modules are built to be Eurorack-native - lower latency, better integration with modular workflows, often more flexible routing.
How important is sample rate and bit depth?
Beyond a certain point, it's more about the analog circuitry. 24-bit/48kHz is plenty for most applications. Chasing 96kHz or higher is often just adding processing overhead without a significant audible benefit.
Can I use an interface module for live performance?
Absolutely, but consider its stability and routing options. Multiple outputs for monitors are essential for a comfortable stage setup. Make sure the drivers are rock-solid.
What's the deal with 'transparent' interfaces?
It means the module isn't adding its own coloration or distortion. It's faithfully reproducing the signal from your modular, letting the character of your synths shine through. It's not necessarily 'better' - just different - but essential for a purist approach.
I'm on a tight budget. Where can I save money?
Skip the bells and whistles. Focus on latency, dynamic range, and driver stability first. A module with fewer features but a cleaner signal path will always outperform a feature-rich one that's noisy or unreliable.
