Best Logic Modules 2026
So, you're diving into the modular world, huh? It's a rabbit hole, but a rewarding one. Logic Modules, those Eurorack building blocks, are where the real magic happens-forget presets, this is about crafting sounds from the ground up. Let's break down what to look for to avoid dropping a bunch of cash on modules that just sit there gathering dust.
Last updated: April 22, 2026 • Next update: April 29, 2026
#1
⭐
4.9/5
Expert Rating
Sound:
9/10
Build:
9/10
Value:
9/10
Ritual Electronics Amnis
Conditional Processing
Complex Patches
Decision Making
Key Feature:
The Amnis is a seriously clever little module if you're into generative sequencing and want to add some controlled chaos to your patches. It’s a great tool for experimental electronic music producers or anyone wanting to create complex, evolving rhythms and modulation patterns without a ton of space. It’s not a beginner module, but the payoff is substantial.
PROS
- • Excellent stepped sequencer for intricate rhythmic patterns.
- • XOR data input expands creative sequencing possibilities.
- • Smooth CV output provides predictable, evolving modulation.
- • Compact 6U form factor saves valuable rack space.
CONS
- • Limited modulation destinations compared to larger modules.
- • Can be initially complex to program and understand fully.
- • Relatively high current draw for a logic module.
⭐
4.9/5
Expert Rating
Sound:
9/10
Build:
9/10
Value:
9/10
Art. 585818
$230
#2
⭐
4.8/5
Expert Rating
Sound:
8/10
Build:
8/10
Value:
9/10
Schlappi Engineering BTMX Black
Complex Patches
Algorithmic Music
Decision Making
Key Feature:
The BTMX Black is a seriously clever little module for patching and creating intricate rhythmic patterns. It’s perfect for experimental musicians and sound designers who want to build complex sequences and modulation systems without a ton of space. It’s a great value for what it offers.
PROS
- • Compact 8HP footprint maximizes space in tight Eurorack setups.
- • Four channels provide ample routing and logic possibilities.
- • Flexible logic functions (AND, OR, XOR, ADD) expand creative potential.
- • Stepped CV output allows for precise sequencing and modulation.
CONS
- • Limited input count per channel (2 binary) restricts complex signal manipulation.
- • Black finish, while aesthetically pleasing, can show fingerprints easily.
- • Logic functions are binary; no analog mixing capabilities are present.
⭐
4.8/5
Expert Rating
Sound:
8/10
Build:
8/10
Value:
9/10
Art. 592907
$230
#3
⭐
4.9/5
Expert Rating
Sound:
7/10
Build:
7/10
Value:
9/10
XAOC Devices Erfurt
by
XAOC Devices
Advanced Control
Conditional Processing
Algorithmic Music
Key Feature:
The Erfurt is a seriously powerful little module if you're diving into the XAOC Leibniz system. It's a workhorse for generating intricate rhythms and textures, but be warned – it's not a standalone solution and requires some understanding of binary logic to fully exploit its potential. Perfect for experimental electronic musicians and those embracing modular complexity.
PROS
- • Exceptional bit resolution for complex rhythmic patterns.
- • Tight, clean digital signals; minimal aliasing observed.
- • Remarkably compact 6HP footprint maximizes patching density.
- • Seamless integration within the XAOC Leibniz ecosystem.
CONS
- • Limited standalone utility outside of Leibniz modules.
- • Steep learning curve for those unfamiliar with binary logic.
- • Can be a power hungry module in densely populated racks.
⭐
4.9/5
Expert Rating
Sound:
7/10
Build:
7/10
Value:
9/10
Art. 541527
$164
#4
⭐
4.7/5
Expert Rating
Sound:
8/10
Build:
8/10
Value:
8/10
Joranalogue Audio Design Compare 2
Decision Making
Conditional Processing
Complex Patches
Key Feature:
The Compare 2 is a seriously clever module for anyone wanting to turn audio or CV into intricate rhythmic patterns. It’s incredibly versatile for creating unique sequences and complex gate patterns, and the compact size makes it a great addition to smaller Eurorack cases – especially for experimental musicians and sound designers.
PROS
- • Highly flexible rhythmic extraction from diverse audio sources
- • Shift and Size controls offer nuanced pattern shaping
- • Comprehensive logic section expands rhythmic possibilities significantly
- • Compact 8HP footprint maximizes space in dense modular setups
CONS
- • Limited input headroom can cause clipping with hot signals
- • Logic section's complexity demands a learning curve for beginners
- • Power draw, while manageable, can be a factor in larger systems
⭐
4.7/5
Expert Rating
Sound:
8/10
Build:
8/10
Value:
8/10
Art. 466342
$208
#5
⭐
4.6/5
Expert Rating
Sound:
7/10
Build:
7/10
Value:
9/10
Schlappi Engineering Nibbler
Complex Patches
Decision Making
Advanced Control
Key Feature:
The Nibbler is a seriously cool little module for those diving deep into modular rhythms and sequencing. It’s not a beginner’s tool, but if you’re comfortable with logic and want to craft intricate, lo-fi sequences and glitchy control signals, this thing unlocks a unique sound. It’s a great choice for experimental electronic musicians and sound designers.
PROS
- • Cherry MX Braun button provides satisfying, tactile reset action.
- • 4-bit accumulator offers surprising rhythmic complexity and control.
- • Flexible input architecture allows for intricate modulation possibilities.
- • Compact form factor maximizes space in dense Eurorack setups.
CONS
- • 4-bit resolution limits fine-grained control over certain sequences.
- • Steep learning curve for users unfamiliar with logic modules.
- • Limited voltage range on stepped outputs restricts certain applications.
⭐
4.6/5
Expert Rating
Sound:
7/10
Build:
7/10
Value:
9/10
Art. 581835
$274
#6
⭐
4.8/5
Expert Rating
Sound:
7/10
Build:
9/10
Value:
7/10
Schlappi Engineering Nibbler Black
Interactive Systems
Conditional Processing
Decision Making
Key Feature:
The Nibbler Black is a quirky little logic module that’s surprisingly deep. It’s perfect for experimental musicians and sound designers who love digging into digital rhythms and complex modulation – think glitchy percussion or evolving sequences. If you’re comfortable with a bit of a learning curve, you’ll unlock some seriously unique sounds.
PROS
- • Cherry MX Braun button feels incredibly robust and satisfying.
- • 4-bit accumulator provides surprising rhythmic complexity.
- • Flexible input options allow for intricate modulation possibilities.
- • Compact 8HP footprint maximizes space in crowded modular racks.
CONS
- • 4-bit resolution limits the precision of some control voltage outputs.
- • Steep learning curve for users unfamiliar with digital logic modules.
- • Limited voltage range (+10V max) restricts compatibility with some modules.
⭐
4.8/5
Expert Rating
Sound:
7/10
Build:
9/10
Value:
7/10
Art. 581848
$263
#7
⭐
5.0/5
Expert Rating
Sound:
9/10
Build:
8/10
Value:
9/10
Schlappi Engineering BTMX
Decision Making
Advanced Control
Complex Patches
Key Feature:
The BTMX is a seriously clever little module. It’s perfect for experimental sound designers and anyone wanting to build complex modulation sequences – think granular processing, rhythmic gate patterns, or creating intricate control systems. Schlappi’s attention to detail really shines here, offering a robust and functional logic solution for your modular system.
PROS
- • Four channels offer significant routing flexibility for complex patterns.
- • Logic functions expand modulation possibilities beyond simple mixing.
- • Compact 8HP footprint saves precious space in dense racks.
- • Schlappi's build quality ensures reliable operation and longevity.
CONS
- • Limited input count per channel restricts intricate signal manipulation.
- • Stepped CV output lacks fine-grained control for subtle modulation.
- • Logic module functionality can be daunting for absolute beginners.
⭐
5.0/5
Expert Rating
Sound:
9/10
Build:
8/10
Value:
9/10
Art. 592905
$230
#8
⭐
4.4/5
Expert Rating
Sound:
8/10
Build:
9/10
Value:
8/10
XAOC Devices Poczdam
by
XAOC Devices
Advanced Control
Complex Patches
Algorithmic Music
Key Feature:
The Poczdam is a seriously clever little module for those deep in the XAOC Devices ecosystem. It’s a data commutator that lets you manipulate and re-clock your Leibniz sequences, adding a layer of unpredictability and complexity. Perfect for experimental musicians and sound designers who love getting lost in the details.
PROS
- • Flexible data routing enhances complex sequencing possibilities.
- • Internal oscillator provides unique clocking and modulation options.
- • Leibniz compatibility unlocks intricate modular workflows.
- • Compact 10HP footprint optimizes patchbay space.
CONS
- • Steep learning curve for those unfamiliar with Leibniz systems.
- • 8-bit outputs introduce quantization and potential aliasing.
- • Limited input/output count restricts signal flexibility.
⭐
4.4/5
Expert Rating
Sound:
8/10
Build:
9/10
Value:
8/10
Art. 549842
$215
#9
⭐
4.8/5
Expert Rating
Sound:
7/10
Build:
7/10
Value:
9/10
Klavis Logica XT Black
by
Klavis
Advanced Control
Decision Making
Complex Patches
Key Feature:
The Klavis Logica XT Black is a tiny powerhouse for gate manipulation. It's perfect for experimental electronic musicians and those needing precise, compact logic sequencing within their modular setup—just be mindful of its current draw and the initial learning curve involved in mastering its modes.
PROS
- • Extremely compact 5HP footprint maximizes precious Eurorack space.
- • 14 operating modes offer surprising flexibility for gate sequencing.
- • Klavis’s build quality is consistently excellent; feels rock solid.
- • CV-controlled switching provides dynamic, real-time logic manipulation.
CONS
- • Limited input count (3) can be restrictive in complex setups.
- • 21mA current draw is noticeable, especially in power-constrained systems.
- • Logic modules aren't always intuitive; a learning curve exists.
⭐
4.8/5
Expert Rating
Sound:
7/10
Build:
7/10
Value:
9/10
Art. 594579
$153
#10
⭐
4.7/5
Expert Rating
Sound:
7/10
Build:
9/10
Value:
9/10
Klavis Two Bits Black
by
Klavis
Decision Making
Interactive Systems
Complex Patches
Key Feature:
The Klavis Two Bits Black is a seriously clever little module for anyone wanting to dive into complex modulation. Its dual sections and 15 modes offer a surprising amount of logic processing in a tiny package – perfect for experimental sound design and generative sequences, especially if you're space-conscious.
PROS
- • Highly versatile logic operations for complex modulation sequences.
- • Compact 5HP footprint maximizes precious Eurorack space.
- • Chainable design doubles functionality without significant HP cost.
- • Clear status LEDs offer instant visual feedback on module state.
CONS
- • Limited input/output options compared to larger logic modules.
- • Steep learning curve for those unfamiliar with logic operations.
- • Power draw, while manageable, can be a factor in densely populated racks.
⭐
4.7/5
Expert Rating
Sound:
7/10
Build:
9/10
Value:
9/10
Art. 594580
$160
#11
⭐
4.5/5
Expert Rating
Sound:
8/10
Build:
8/10
Value:
8/10
Klavis ComPair Black
by
Klavis
Complex Patches
Interactive Systems
Decision Making
Key Feature:
The Klavis ComPair Black is a seriously useful little module for anyone wanting to inject some rhythmic or tonal variation into their Eurorack system. It's remarkably compact and the comparator modes offer a surprising amount of creative potential, especially for glitchy sequences or modulating envelope shapes. Great for experimental sound design and adding subtle movement.
PROS
- • Excellent signal shaping with versatile comparator modes.
- • Klavis build quality is consistently robust and reliable.
- • Tiny 3HP footprint maximizes Eurorack space efficiency.
- • Intuitive controls and clear LED indication simplify operation.
CONS
- • Limited input flexibility compared to more complex modules.
- • Three HP can feel cramped for intricate patching workflows.
- • No attenuators on the threshold controls – requires external attenuation.
⭐
4.5/5
Expert Rating
Sound:
8/10
Build:
8/10
Value:
8/10
Art. 610301
$153
#12
⭐
4.9/5
Expert Rating
Sound:
7/10
Build:
5/10
Value:
8/10
Shakmat Modular SumDif
Decision Making
Complex Patches
Advanced Control
Key Feature:
The SumDif is a surprisingly useful little module for basic signal manipulation. It’s a great entry point for understanding modular logic and perfect for experimental sound design or CV processing where simple math is your goal. It's a solid, no-frills option for those building a budget-friendly Eurorack system.
PROS
- • Excellent value for basic arithmetic operations.
- • Compact 2TE form factor saves precious panel space.
- • Clean summing and differentiation with minimal noise.
- • Solid Shakmat build quality – feels robust and reliable.
CONS
- • Limited functionality compared to more complex logic modules.
- • 15mA draw can add up in power-hungry racks.
- • No attenuators, limiting dynamic control range.
⭐
4.9/5
Expert Rating
Sound:
7/10
Build:
5/10
Value:
8/10
Art. 521222
$98
#13
⭐
4.8/5
Expert Rating
Sound:
6/10
Build:
6/10
Value:
9/10
Ritual Electronics Répression
Interactive Systems
Algorithmic Music
Conditional Processing
Key Feature:
The Répression is a seriously useful little module for anyone building generative or experimental patches. It’s a clever way to introduce logic and modulation into your sound, adding rhythmic complexity without needing a full-blown sequencer. Great for sound designers and those wanting to get really creative with voltage control.
PROS
- • Excellent voltage comparator for creating complex rhythmic and melodic sequences.
- • The 'Equal' output offers unique triggering possibilities for modulation.
- • Bipolar output provides versatile signal shaping and voltage manipulation.
- • Compact 12HP footprint maximizes space in dense modular setups.
CONS
- • Limited input voltage range requires careful signal scaling.
- • The 'Equal' output can be finicky and require precise threshold adjustment.
- • No attenuators on outputs; signal levels can be challenging to manage.
⭐
4.8/5
Expert Rating
Sound:
6/10
Build:
6/10
Value:
9/10
Art. 541235
$94
#14
⭐
4.9/5
Expert Rating
Sound:
7/10
Build:
6/10
Value:
10/10
Doepfer A-150
by
Doepfer
Algorithmic Music
Complex Patches
Decision Making
Key Feature:
The A-150 is a rock-solid, bare-bones dual switch – exactly what you need when you want clean, reliable routing without extra frills. It’s perfect for modular beginners or experienced patchers who need a small, efficient way to direct signals. This is a workhorse module, plain and simple.
PROS
- • Reliable Doepfer build quality, known for longevity
- • Simple, clean switching action – no unwanted noise
- • Compact 4HP footprint maximizes patching density
- • Versatile for signal routing, modulation, or logic sequencing
CONS
- • Limited voltage range (-8V to +8V) restricts some applications
- • Basic functionality; lacks advanced features of more complex routers
- • 4HP can feel cramped when patching multiple modules
⭐
4.9/5
Expert Rating
Sound:
7/10
Build:
6/10
Value:
10/10
Art. 114728
$72
#15
⭐
4.8/5
Expert Rating
Sound:
8/10
Build:
5/10
Value:
8/10
Doepfer A-165-2
by
Doepfer
Algorithmic Music
Interactive Systems
Advanced Control
Key Feature:
The A-165-2 is a solid, no-frills logic module from Doepfer, perfect for those building sequencing and control systems. It’s a great way to create complex trigger patterns and manipulate clock signals without needing a full-blown sequencer module – a real workhorse for any modular enthusiast.
PROS
- • Doepfer's robust construction ensures reliable, long-term operation within a modular system.
- • The toggle flip-flop provides a simple yet powerful logic function for sequencing.
- • Compact 2HP size maximizes space efficiency in dense Eurorack configurations.
- • Multiple output configurations offer flexibility in routing and signal manipulation.
CONS
- • Limited to logic signals; unsuitable for audio processing, restricting its versatility.
- • The 2HP width can be a constraint in smaller modular setups.
- • Requires careful power planning due to its 30mA current draw.
⭐
4.8/5
Expert Rating
Sound:
8/10
Build:
5/10
Value:
8/10
Art. 596069
$94
How to Choose the Best Logic Modules
1
Oscillators
It's the core. Look beyond just waveforms; consider stability (drift), pulse width modulation (PWM) capabilities, sync options, and overall harmonic content. A gritty, aliasing oscillator can be a huge asset for textures, while a clean sine wave is essential for pads and sub-bass. Cheap oscillators often have a noticeable drift, especially at higher pitches.
2
Filters
The heart of your sound. Resonance is key - does it scream, or just gently swell? Filter type (Moog ladder, SSI, Korg MS-20) drastically alters the character. Listen for that sweet spot where the filter self-oscillates and creates interesting feedback. Budget filters can sound muddy or thin out the low end.
3
Envelopes (ADSR)
Dynamics are everything. Fast attack times for snappy percussion, long release times for evolving pads. Consider multiple envelopes and looping capabilities. Poorly implemented envelopes can feel sluggish or lack precision, killing the feel of a patch.
4
Modulation Sources (LFOs, VCAs, etc.)
The glue that holds it all together. Look for multiple waveforms, flexible routing, and decent range. A weak LFO can make a great oscillator sound lifeless. Complex modulation sources like wavefolders or phase distortion add serious sonic possibilities.
5
Utility Modules (Attenuators, Mixers, VCAs)
Don't sleep on these! They're the unsung heroes. An attenuator lets you tame unruly signals, a mixer blends them, and a VCA controls amplitude. These are crucial for shaping and controlling your sound, and often overlooked when people focus solely on the 'sexy' modules.
Buying Guide
Modular is expensive, so be smart. Don't chase hype - listen to demos and read reviews critically. Used gear is your friend, but check for wear and tear on pots and jacks. A few well-chosen modules that you really understand will go further than a rack full of things you don't use.
Our Methodology
We're not about spec sheets here. We evaluate these modules the way we evaluate any gear: by playing them. We're talking hours of hands-on use, A/B comparisons against other modules in their category, and putting them through the wringer in real-world scenarios - from bedroom experimentation to full band rehearsals and recording sessions. We're listening for character, utility, and whether it actually inspires creativity.
Frequently Asked Questions
'Logic Module' is just a term we're using to refer to any Eurorack module that offers a lot of control and flexibility. It's not an official designation.
Start with the basics: oscillator, filter, envelope, VCA, and a power supply. A simple mixer is also a great addition. Don't try to build a massive system right away.
Voltage control means a parameter (like filter cutoff or oscillator pitch) is controlled by a voltage signal. This is what allows for dynamic, evolving sounds and complex modulation patterns.
Absolutely, but be careful. Make sure it provides enough current per rail and is reliable. A power supply failure can damage your modules.
Aliasing is when frequencies higher than the Nyquist frequency (half the sampling rate) fold back into the audible range, creating a gritty, distorted sound. Some oscillators are designed to exploit aliasing for character.
