Expressive E Osmose

Pricing and availability

We compare 600+ stores and found this item at 5 stores. Prices updated June 6, 2026.

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4.0 (15)

$1,799.00

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4.0 (2)

$1,799.00

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3.6 (6)

$1,799.00

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5.0 (4)

$265.52 22 available New

$1,199.00 28 available Used

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4.4 (5)

$1,799.00

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Average Price: $1,443

Standard/Professional

$500

$1501+

Price Tier

In the Synthesizers category, Expressive E Osmose is priced in the upper end of the Standard/Professional range. This is quality gear at a fair price point, suitable for beginners, hobbyists, and pros alike.

Budget

Standard

High-end

Price History

Based on price data from 4 merchants for "Expressive E Osmose". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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Step into a new era of musical expression with the Expressive E Osmose. This revolutionary synthesizer breaks the mold with its 49 full-size keys offering three-dimensional control, allowing musicians to explore soundscapes with unprecedented nuance. Whether you're pressing, bending, or shaking, each gesture transforms into a unique auditory experience, thanks to the collaborative genius of Expressive E and Haken Audio's EaganMatrix sound engine.

The Osmose is not just a synthesizer; it's a dynamic performer. It seamlessly transitions between a standalone synth, an MPE MIDI controller, and a classic MIDI controller. With up to 24-voice polyphony, this instrument invites you to craft complex arrangements with ease. Its sound library, enriched with over 500 presets, spans a vast array of acoustic, electronic, and hybrid tones that respond to the subtlest touch, adding depth and dimension to your compositions.

Connectivity is key for modern musicians, and the Osmose delivers with 5-pin DIN MIDI I/O, USB, dual pedal inputs, and stereo line outputs. The intuitive interface, featuring a color LCD screen and versatile modulation sliders, ensures that navigating this powerhouse of sonic potential is as inspiring as the sounds it produces.

Key Features:

49 full-size keys with three-dimensional control
EaganMatrix sound engine by Haken Audio
Up to 24-voice polyphony
Over 500 presets tailored for expressive performance
Functions as standalone synth, MPE MIDI, and classic MIDI controller
Dual ¼" TS line outputs and ¼" TRS headphone output
5-pin DIN MIDI In, Out/Thru, and USB connectivity
Two assignable pedal inputs for sustain or synth parameters

Product specs

Brand	Expressive E
Model	Osmose 49-Key 24-Voice Polyphonic Synthesizer
Finish	Black
Year	2022 - 2025
Categories	Digital Synthesizers, Keyboard Synths
Analog / Digital	Digital
Key Size	Full Size
Keyboard Action	Synth Action
MIDI I/O	MIDI Input, MIDI Output, USB MIDI
Number of Keys	49 Keys
Polyphony	24 Voices

FAQs

What makes the Expressive E Osmose unique compared to other synthesizers?: The Expressive E Osmose features a unique three-dimensional control system with 49 full-size keys, allowing for expressive playing techniques not possible on traditional keyboards. It combines a standalone synthesizer with the EaganMatrix sound engine and functions as both an MPE MIDI and classic MIDI controller.
Is the Expressive E Osmose suitable for live performances?: Yes, the Osmose is suitable for live performances due to its robust build and versatile sound capabilities. Its three-dimensional touch-sensitive keys offer dynamic expression, making it ideal for expressive live playing.
Can the Expressive E Osmose be used as a MIDI controller?: Yes, the Osmose can be used as both an MPE MIDI controller and a classic MIDI controller, offering extensive connectivity options including MIDI Input, MIDI Output, and USB MIDI.
How does the EaganMatrix sound engine enhance the Osmose's capabilities?: The EaganMatrix sound engine, developed by Haken Audio, provides the Osmose with a wide range of sound design possibilities, offering up to 24 voices of polyphony and allowing for complex and rich soundscapes.
Does the Expressive E Osmose require additional software to function?: No, the Osmose is a standalone synthesizer and does not require additional software to create sounds. However, it can be integrated with DAWs and other music software for expanded functionality.

Videos

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ANDREW HUANG

We now have the feature we've all dreamed of... (Expressive E Osmose)

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Osmose by Expressive E with Jordan Rudess - NAMM 2023

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Expressive E Osmose - The BEST Midi SYNTHESIZER?!?!

Archie Beatz

Reviews

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PROS

Revolutionary interaction with the keybed for unparalleled expressiveness
Closest electronic synth experience to an acoustic instrument
MPE support enhances control with VST instruments
Haken Audio sound engine produces incredible acoustic voices
Velocity sensitivity allows pain-free long sessions for those with nerve issues
Keys offer flexibility and control similar to fretless or breath controllers
Poly aftertouch allows for nuanced chord and melody expression
Onboard synth complements external MIDI setups seamlessly

CONS

Keys not suitable for fast trills due to slower bounce-back action
Only 49 keys may not suffice for two-handed playing
Not a suitable substitute for traditional weighted piano action
Challenging to program new sounds initially
Made in China may disappoint some users

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Expressive E Osmose.

Comparisons

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Compared to the Roli Seaboard, the Osmose is noted for being more comfortable and immediately playable, with a deeper key travel that enhances control over key pressure.
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The Osmose is noted for its unique sound palette in hip hop, offering a broader range of sounds compared to traditional analog synths like the Take 5.
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Compared to the Roli Seaboard Rise 2 and Linnstrument, the Osmose is less robust, with a plastic build and wobbling keys that can snag each other, which some find less premium.
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Use cases and applications

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The Osmose is particularly praised for its potential in film scoring, with its expressive capabilities lending well to cinematic soundscapes.
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The Osmose excels in producing cinematic sounds, suitable for movie and video game soundtracks due to its expressive capabilities.
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It is particularly valued as a unique MPE controller with a piano-like keybed, a feature not widely available in other controllers.
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Software and compatibility

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Some users express a desire for MPE compatibility in more sample libraries, highlighting a gap in current VST offerings when using the Osmose.
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The Eagan Matrix Editor can be downloaded to edit presets or create patches, although it is complex and challenging to master.
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User experience

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Owners find the Osmose inspiring for orchestral and ambient textures, but it can be challenging for players not accustomed to its expressive control.
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Some users report a learning curve, with the Osmose requiring precise finger technique to play chords without detuning, particularly on polyphonic patches.
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The Eagan Matrix engine is noted for its exceptional presets, though programming new sounds is challenging due to its complexity and lack of accessibility for most users.
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Features and functionality

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The Osmose's keybed requires practice for effective use, as it amplifies mistakes and requires unique finger control due to its expressive capabilities.
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The Osmose allows chromatic glisses using the solid black area of the keys, emulating a strumming effect reminiscent of the inside of a grand piano.
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The Osmose allows pitch bend per note and polyphonic aftertouch, with high-frequency controls directly influencing the synthesis engine for a tactile playing experience.
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Value and pricing

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Initial owners expected the Osmose to cost over $2500 but were pleasantly surprised by its $1800 price tag, making it accessible to average musicians.
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Refurbished units from Expressive E are sometimes available for around $1,250, offering significant savings with a full warranty compared to new models.
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Build quality

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The Osmose features a metal enclosure and heavier keys, contributing to its sturdy feel, similar to a wooden piano.
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Setup and maintenance

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Purchasing directly from Expressive E’s website might offer opportunities for refurbished deals, although availability can vary based on supply and demand.
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Critic Reviews

Expressive E Osmose: A Genuine Game-Changer - Attack Magazine

attackmagazine.com

The Expressive E Osmose is a groundbreaking instrument that brings a refreshing approach to keyboard playability, offering an expressive synth experience that feels like a blend of piano and guitar dynamics. Its unique keybed allows for pitch bending and vibrato, making it a joy for performance-oriented musicians. However, the learning curve for its EaganMatrix sound engine can be steep, and the sound quality is described as hit-or-miss at times, potentially requiring users to rely on preset sounds initially. Weighing in at 8.3kg, it’s arguably hefty for a synth, but the overall build quality feels premium. At £1,555, it stands out as a compelling choice for composers and live performers, albeit with some caveats regarding sound design complexity.

positive

Full Review

soundonsound.com

The Expressive E Osmose is a revolutionary synthesizer that masterfully blends traditional keyboard familiarity with groundbreaking MPE expressivity. Its innovative key action allows for nuanced control, enabling musicians to explore a wide range of expressive techniques effortlessly. The built-in EaganMatrix synth engine delivers a rich tapestry of sounds that feel alive and responsive. However, the complex programming interface may intimidate newcomers, requiring a steep learning curve to fully unlock its potential. Despite this, the Osmose's superb sound quality and unique approach mark it as a standout in the synth market, offering a truly inspiring experience for composers and performers alike.

positive

Full Review

Expressive E Osmose review | MusicRadar

musicradar.com

The Expressive E Osmose blends traditional keyboard familiarity with innovative gestural control, making it a noteworthy addition for MPE enthusiasts. Its powerful EaganMatrix synth engine offers vast sound design potential, though the complex Haken Editor may frustrate some users. Setup can be cumbersome, requiring firmware updates to unlock features, and the interface can feel cramped. Additionally, while it excels in many areas, it doesn’t quite feel like a polished final product, hinting at some bugs and a need for refinement. If you’re willing to navigate its quirks, the Osmose could expand your sonic possibilities significantly.

neutral

Full Review

Expressive E Osmose review: A game-changing MPE keyboard, but a frustrating synthesizer

engadget.com

The Expressive E Osmose excels with its innovative keybed, enabling nuanced MPE performances reminiscent of string instruments. However, it falters as a standalone synthesizer, burdened by a convoluted EaganMatrix engine that feels more like a theoretical exercise than a practical tool. While its interface is approachable, the lack of intuitive sound design options and underwhelming presets detract from its potential. Many users may find themselves frustrated rather than inspired, making it more suited as a sophisticated MIDI controller than a reliable synth.

negative

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