AudioFu Chart · November 2026
Best Interface Modules 2026
The top pick is Doepfer A-119 Ext.In External Input / Envelope Follower ($84). Expert Sleepers Super Disting EX Plus A Multi-Function Eurorack Synth… leads the high end. Ranked by the AudioFu Index from 66 models across 19 brands, prices checked every night.
Last updated: November 4, 2026
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All Interface ModulesTop 10
Full detail for the 10 highest AudioFu Index scores. Every other model is listed below.
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Doepfer A-119 Ext.In External Input / Envelope Follower
A-119 · Doepfer
14 for sale on Reverb2 finishes at Thomann
If you want to bring outside audio into your A-100 system, this module does that job. It has two inputs, one for line-level signals and one for low-level sources like a mic or electric guitar. It turns the signal into an envelope and a gate signal you can use to control other modules, so it suits you if you want outside sound to shape your patch.
Pros
- Unbalanced input with gain of 0 to 20 suits line-level signals
- Balanced input with gain of 0 to 500 handles low-level signals like mic and electric guitar
- Envelope follower output follows the signal profile of the external audio
Cons
- Needs a 12 V and -12 V supply, drawing 30 mA and -20 mA
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Expert Sleepers ES-8 USB Audio Interface Eurorack Synth Module
ES-8 · Expert Sleepers
23 for sale on Reverb1 finish at Thomann
You might like this if you want your computer to link up with a Eurorack modular rig. It passes CV and audio between the two and works with software such as Max/MSP, Reaktor, and Bitwig Studio. Mac and iOS users can start quickly, since no driver is needed.
Pros
- Four 3.5 mm mini jack line inputs and eight 3.5 mm mini jack line outputs for CV and audio
- DC-coupled inputs and outputs work with both control voltages and audio
- Class-compliant, so no driver is required on macOS and iOS
Cons
- Needs a Eurorack power supply, drawing 198 mA at +12 V and 52 mA at -12 V
81AudioFu
IndexStableno change since Aug 17Aug 17$558 now$558€499 at Thomann · in stockCheck price ↗ -
Expert Sleepers Super Disting EX Plus A Multi-Function Eurorack Synth…
Disting NT · Expert Sleepers
18 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.
78AudioFu
IndexStableno change since Aug 17Aug 17$780 now$780€698 at Thomann · in stockCheck price ↗ -
The InAmp is a dual preamp for Eurorack setups. It accepts external sources such as guitars, basses, synthesizers, and drum computers, and each channel has its own gain control. If you want a small module that brings outside instruments into your modular rig, you will likely find it useful.
Pros
- Dual preamplifier with two independent channels for flexible signal routing
- Each channel has two inputs, a 6.3 mm and a 3.5 mm jack
- Both inputs can be used at the same time on each channel
Cons
- Only one gain control per channel, with no further tone or EQ controls
77AudioFu
IndexStableno change since Aug 17Aug 17$144 now$144€129 at Thomann · in stockCheck price ↗ -
Doepfer A-190-4 USB / MIDI to CV / Gate / Sync Interface
A-190-4 · Doepfer
11 for sale on Reverb1 finish at Thomann
You get this module if you want to link a computer or MIDI keyboard to a modular synth. It has MIDI and USB inputs, CV and gate outputs, and a clock, so it can send notes and timing to your other modules. It suits anyone building a Eurorack setup who wants a clear way to control it from a digital source.
Pros
- Converts MIDI and USB signals into CV and gate for modular gear
- Includes separate CV1 and CV2 outputs plus Gate, Clock and Reset
- Has a 3-digit LED display to show its settings
Cons
- Needs a separate power source, drawing +200 mA at +12 V and -40 mA at -12 V
72AudioFu
IndexStableno change since Aug 17Aug 17$207 now$207€185 at Thomann · in stockCheck price ↗ -
Expert Sleepers FH-2 Factotum MIDI / CV Converter Eurorack Synth…
FH-2 · Expert Sleepers
12 for sale on Reverb1 finish at Thomann
The FH-2 is a Eurorack module that takes MIDI from your computer or gear and turns it into control voltage for your modular synth. It also has a clock, LFO, and arpeggiator, so you can build patterns without extra modules. If you run a modular rig and want USB and MIDI control in one 8 HP panel, this one fits well.
Pros
- Works as a USB MIDI host and USB MIDI device, so it links computers and gear
- Includes a MIDI to CV converter with clock and LFO generator for Eurorack setups
- Has eight 14-Bit D/A conversion outputs with software-selectable ±5 V or 0-10 V range
Cons
- Needs a Eurorack power supply, drawing 118 mA at +12 V and 48 mA at -12 V, plus any attached USB device
72AudioFu
IndexStableno change since Aug 17Aug 17$349 now$349€312 at Thomann · in stockCheck price ↗ -
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 small Eurorack module that packs many tools into one box. It can make oscillators, process CV and audio, and play WAV samples and MIDI files from a Micro SD card. It suits you if you already have a Eurorack case and want one flexible module with delay, reverb and sample playback in a compact size.
Pros
- Runs 84 different algorithms, including dual waveshaper, delay, echo, stereo chorus and reverb
- Plays WAV sample files and MIDI files, with options for triggering and playback speed
- Dot matrix screen shows what you are working on
Cons
- Needs a Eurorack case with power, since it draws 51 mA at +12 V and 19 mA at -12 V
71AudioFu
IndexStableno change since Aug 17Aug 17$208 now$208€186 at Thomann · in stockCheck price ↗ -
Doepfer A-190-3 USB / MIDI CV / Gate Interface
A-190-3 · Doepfer
5 for sale on Reverb2 finishes at Thomann
If you have an A-100 modular system and want to control it from a computer or MIDI gear, this module is made for that job. It turns USB or MIDI messages into four analogue CV signals and a Gate signal your modular can use. It takes up just 6 HP, so it fits easily into a small rack.
Pros
- Connects the A-100 modular system to USB or MIDI
- Provides four analogue CV outputs
- Includes a Gate signal output
Cons
- Needs +12V and -12V power to run
70AudioFu
IndexStableno change since Aug 17Aug 17$140 now$140€125 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.
68AudioFu
IndexStableno change since Aug 17Aug 17$703 now$703€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
You get this if you run a Eurorack setup and want it connected to a computer. It gives you 16 inputs and 16 outputs over USB, and its inputs and outputs handle both control voltage and audio. It links modular gear, MIDI equipment and computers, so it helps you route signals between your rack and your software.
Pros
- Handles 16 inputs and 16 outputs over USB audio at 24-bit/96kHz
- DC-coupled inputs and outputs handle both CV and audio signals
- USB-C connection to a computer, supporting Win7 or higher, macOS and iOS
Cons
- MIDI In/Out requires the separate MIDI Breakout module, which is not included
- Draws 451 mA on +12 V, so your Eurorack power supply needs to cover that load
67AudioFu
IndexStableno change since Aug 17Aug 17$691 now$691€618 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.
- 11
Make Noise XOH ModuleXOH · Make Noise64Stable$144€129$144€129Check ↗
- 12
Expert Sleepers Little Mikey Preamp Eurorack Synth ModuleLittle Mikey · Expert Sleepers63Stable$189€169$189€169Check ↗
- 13
Joranalogue Audio Design Receive 2Joranalogue Audio Design63Stable$210€188$210€188Check ↗
- 14
Intellijel Designs Stereo Line In 1UIntellijel Designs62Stable$83€74$83€74Check ↗
- 15
Intellijel Designs Stereo I/O 1UIntellijel Designs62Stable$240€215$240€215Check ↗
- 16
Joranalogue Audio Design Transmit 2Joranalogue Audio Design59Stable$218€195$218€195Check ↗
- 17
Befaco Out 1U Eurorack Synthesizer Module1U Out · Befaco58Stable$99€89$99€89Check ↗
- 18
Expert Sleepers ES-6 MK3 CV / Lightpipe Interface Eurorack Synth…ES-6 mk3 · Expert Sleepers58Stable$178€159$178€159Check ↗
- 19
Befaco CV Thing Eurorack Synthesizer ModuleCV Thing · Befaco58Stable$278€249$278€249Check ↗
- 20
Befaco MIDI Thing V2 Eurorack Synthesizer ModuleMIDI Thing V2 · Befaco58Stable$357€319$357€319Check ↗
- 21
Xaoc Devices Sewastopol II Audio Port & Voltage ExpanderSewastopol II · XAOC Devices57Stable$290€259$290€259Check ↗
- 22
Doepfer A-190-8 USB / MIDI Sync InterfaceA-190-8 · Doepfer56Stable$140€125$140€125Check ↗
- 23
Intellijel Designs MIDI 1UIntellijel Designs56Stable$255€228$255€228Check ↗
- 24
Intellijel Designs uMIDIIntellijel Designs56Stable$274€245$274€245Check ↗
- 25
Doepfer A-190-5 Polyphonic USB / MIDI to CV / Gate InterfaceA-190-5 · Doepfer56Stable$334€299$334€299Check ↗
- 26
Frap Tools CGM Creative Mixer Series - M one MasteroneCGM Masterone · Frap Tools56Stable$352€315$352€315Check ↗
- 27
Intellijel Designs Pedal I/O JACKS 1UIntellijel Designs52Stable$27€24$27€24Check ↗
- 28
Intellijel Designs Headphones 1UIntellijel Designs52Stable$87€78$87€78Check ↗
- 29
Intellijel Designs Pedal I/O 1U V2Intellijel Designs50Stable$115€103$115€103Check ↗
- 30
Intellijel Designs StompIntellijel Designs50Stable$234€209$234€209Check ↗
- 31
Intellijel Designs Audio I/O (2023)Intellijel Designs50Stable$312€279$312€279Check ↗
- 32
Doepfer A-139-2 Headphone AmplifierDoepfer49Stable$66€59$66€59Check ↗
- 33
Doepfer A-190-7 1UDoepfer49Stable$72€64$72€64Check ↗
- 34
Doepfer A-119-2Doepfer49Stable$73€65$73€65Check ↗
- 35
Doepfer A-192-2Doepfer49Stable$144€129$144€129Check ↗
- 36
Befaco 1U STAmpBefaco48Stable$88€79$88€79Check ↗
- 37
Befaco Output V3Befaco48Stable$161€144$161€144Check ↗
- 38
Expert Sleepers NTX-8CVExpert Sleepers48Stable$222€199$222€199Check ↗
- 39
Befaco I4 Instrument InterfaceBefaco48Stable$263€235$263€235Check ↗
- 40
Befaco VCMCBefaco48Stable$372€333$372€333Check ↗
- 41
Expert Sleepers ES-10Expert Sleepers48Stable$401€359$401€359Check ↗
- 42
Behringer CM1A MIDI to CV Eurorack ModuleCM1A · Behringer46Stable$44€39$44€39Check ↗
- 43
Intellijel Designs Line Out 1UIntellijel Designs46Stable$44€39$44€39Check ↗
- 44
ADDAC 309 CV to ExpressionADDAC46Stable$84€75$84€75Check ↗
- 45
Intellijel Designs Stereo Out 1UIntellijel Designs46Stable$87€78$87€78Check ↗
- 46
ADDAC 200PI Pedal IntegratorADDAC46Stable$129€115$129€115Check ↗
- 47
Intellijel Designs OutsIntellijel Designs46Stable$188€168$188€168Check ↗
- 48
ADDAC 710 Balanced OutputsADDAC46Stable$207€185$207€185Check ↗
- 49
ADDAC 711 Balanced InputsADDAC46Stable$312€279$312€279Check ↗
- 50
ADDAC 220 Dual Envelope Follower+ADDAC46Stable$413€369$413€369Check ↗
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
Gain Staging
This is everything. A poorly designed interface module can introduce noise or clip your signal before it even leaves your case. Look for modules with clear gain controls and a decent headroom buffer - you don't want to be fighting noise on stage or constantly adjusting levels in your DAW.
Input/Output Impedance
Matching impedances is vital for clean signal transfer. A low-impedance output into a high-impedance input will load down your oscillators, robbing them of sustain and dynamics. Check the specs and, if possible, test with your existing gear to ensure a transparent signal path.
Connectivity
Beyond the obvious ¼" jacks, consider what other options you need - S/PDIF, ADAT, USB. Do you need multiple outputs for routing to different effects chains or monitors? Think about your workflow and future needs.
Latency
Especially important if you're recording, latency is the delay between your signal and what you hear back. Some modules, particularly older or cheaper ones, can introduce noticeable lag. Look for modules with minimal processing and well-optimized drivers.
Build Quality & Noise Floor
Let's be honest, modular synths are an investment. A flimsy module with a noisy preamp will degrade your signal and frustrate you. Solid construction and a low noise floor are non-negotiable - you'll hear the difference in a quiet mix.
Buying guide
So, you're diving into the modular world? Awesome. But slapping a bunch of oscillators and filters together is only half the battle - you need a solid interface module to actually get that sound out and into your DAW, your mixer, or a PA system. These modules are the crucial link between your sonic playground and the outside world, and choosing the right one can make or break your workflow. Let's break down what to look for.
Don't cheap out on the interface - it's the last thing you want to be a weak link. Budget modules often cut corners on components, leading to higher noise floors and questionable gain staging. While you don't need to drop a fortune, prioritize modules from reputable manufacturers with a track record of clean signal paths and reliable performance.
A few extra bucks here is an investment in your sanity and the quality of your sound.
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 module and a more complex one?
Simple modules primarily convert analog signals to digital or vice versa. Complex ones might offer routing capabilities, multiple input/output options, or even built-in effects - they're essentially mini-mixers/routers in module format.
My module is introducing a high-pitched whine. What's going on?
That's usually ground loop hum or a noisy preamp. Double-check your grounding, try different power outlets, and if it persists, the module might be faulty.
Can I use any old audio interface module with my modular system?
Technically, yes, but impedance mismatch can severely impact your sound. Research the input and output impedances of both your modular gear and the interface module to ensure compatibility.
USB connectivity is a must-have? Is it worth the extra cost?
If you plan on recording or integrating your modular system with a DAW, USB is a huge convenience. However, USB interfaces can sometimes introduce slightly higher latency than dedicated audio outputs - it's a trade-off.
What's 'headroom' and why should I care?
Headroom is the amount of signal you can push before clipping. More headroom means more dynamic range and less risk of distortion, especially when dealing with hot oscillator signals. A module with good headroom will give you a cleaner, more professional sound.
