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Average Price: $215
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$149
$350+
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Based on price data from 1 merchant for "Cosmotronic Messor". Prices shown reflect NEW condition. Tracking began Apr 7, 2026.
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Description
Step into a new realm of sound shaping with the Cosmotronic Messor, a stereo compressor and transient processor designed to elevate your modular synthesizer setup. This Eurorack module is not just about compression; it’s a versatile tool that lets you sculpt your sound with precision, offering an array of controls that cater to both subtle dynamics and bold sonic transformations.
At its core, the Messor features a VCA compressor with an integrated side chain filter, providing dynamic control over your audio with adjustable parameters for ratio, threshold, attack, release, and gain. The switchable saturation stage adds warmth and character to your tracks, while the bypass switch ensures seamless integration into your existing setup without losing any original signal integrity.
The Messor's side chain filter is versatile, with options to switch between low pass and high pass, and it covers a wide frequency range from 10 Hz to 9 kHz. For those who crave hands-on manipulation, CV inputs allow for external control over attack, release, gain, and side chain cutoff, giving you the ability to inject movement and life into your mixes.
Connect your stereo audio inputs and side chain input easily, and enjoy the flexibility of stereo audio outputs and an envelope signal output, making the Messor a vital component for any modular enthusiast looking to add depth and expression to their soundscapes.
Key Features:
- Stereo compressor and transient processor
- VCA compressor with integrated side chain filter
- Adjustable controls for ratio, threshold, attack, release, and gain
- Switchable side chain filter between low pass and high pass (10 Hz - 9 kHz)
- Switchable saturation stage and bypass switch
- CV inputs for attack, release, gain, and side chain cutoff
- Stereo audio inputs and outputs, side chain input and envelope signal output
- Current consumption: 45 mA (+12 V) / 26 mA (-12 V)
Product specs
| Available since | January 2022 |
| Reverb | Ne |
| Delay | No |
| Multieffect | No |
| Misc. Effects | Yes |
| Width | 8 TE / HP |
FAQs
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What type of effects does the Cosmotronic Messor offer?
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The Cosmotronic Messor provides a variety of miscellaneous effects, making it a versatile addition to any modular synth setup. However, it does not include reverb or delay effects.
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How wide is the Cosmotronic Messor module?
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The Cosmotronic Messor has a width of 8 TE/HP, which is a compact size suitable for most Eurorack systems.
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Is the Cosmotronic Messor suitable for creating ambient soundscapes?
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While the Cosmotronic Messor does not feature built-in reverb or delay, its miscellaneous effects can still contribute to creating unique ambient textures when combined with other modules.
Videos
Cosmotronic
Cosmotronic Messor - stereo compressor demo
Reviews
PROS
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Great sound quality enhances musical projects
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Offers extensive CV control for dynamic performance
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Unique envelope out triggered by compression detection
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Effective as a master compressor for mixers
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Built-in sidechain filter adds to versatility
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Capable of adding a distinct "signature sound"
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Attractive design enhances modular setup aesthetics
CONS
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Smaller knobs feel flimsy, may require replacement
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Requires understanding of compression for full benefits
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Cosmotronic Messor.
Features and functionality
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The Cosmotronic Messor includes an envelope follower output that can function independently of the compressor, offering versatile signal processing options.
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Messor's multimode filter allows for creative sidechain applications, such as using a highpass filter for sidechaining instead of ducking.
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The Messor's gain boost feature allows users to push and distort signals with two distinct flavors, enhancing creative sound design possibilities.
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Negative compression ratios are possible with the Messor, offering unique sound shaping capabilities uncommon in most compressors.
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The Messor's envelope follower can modulate other modules like the WMD Overseer, impacting elements such as bass drum dynamics when placed at the end-of-chain.
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Use cases and applications
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Ideal for techno rumble kicks, the Messor provides attack and release control, crucial for shaping dynamic electronic percussion sounds.
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The Messor is effectively used for drum bus compression by modulating depth and level, making it versatile for dynamic processing in modular setups.
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The Messor is frequently positioned at the end of signal chains to enhance saturation and harmonics, especially before final output modules.
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The Messor is praised for its CV controllability, allowing precise transient shaping and dynamic control, which is particularly useful for end-of-chain processing.
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Comparisons
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In contrast to Erica Synths' Stereo Compressor, the Messor is only marginally more expensive but offers significantly more features, including CV control on key parameters.
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User experience
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Owners appreciate the Messor's LED visuals, which provide clear feedback on output and threshold settings, facilitating easier adjustments.
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A user reported an unsatisfactory experience with a first production unit of the Messor, suggesting potential factory issues affecting initial performance.
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Critic Reviews
Based on 0 Reviews and 0 Ratings
Artist usage
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Based on how musicians on Equipboard use Cosmotronic Messor, it is most commonly used with the following gear.
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