Home
... Musical Instruments
Keyboards, Synthesizers & MIDI
Synthesizers & Sound Modules
Synthesizers
Expressive E
Expressive E Osmose 49-key Polyphonic Synthesizer and MIDI Controller

Expressive E Osmose 49-key Polyphonic Synthesizer and MIDI Controller main image

Expressive E Osmose 49-key Polyphonic Synthesizer and MIDI Controller image 2

Expressive E Osmose 49-key Polyphonic Synthesizer and MIDI Controller image 3

Expressive E Osmose 49-key Polyphonic Synthesizer and MIDI Controller

$263.51 to $1,799.00 Price Tier: Standard

5.0 (1)

4 Critic Reviews

1 Review

Find out who is using Expressive E Osmose 49-key

3 community setups

6 wishlisted

27 saved

Page last updated Jul 04, 2026

Pricing and availability

We compare 600+ stores and found this item at 8 stores. Prices updated July 4, 2026.

Store

Reviews

Price

4.0 (15)

$1,799.00

View Deal

4.0 (2)

$1,799.00

View Deal

5.0 (5)

$263.51 27 available New

$1,127.00 32 available Used

View Deal

5.0 (3)

$1,799.00

View Deal

4.4 (5)

$1,799.00

View Deal

4.8 (48)

$1,555.00 $1,550.00 $5.00 · All time low

View Deal

£1,589.00

View Deal

$1,799.00

View Deal

Average Price: $1,492

Standard/Professional

$500

$1501+

Price Tier

In the Synthesizers category, Expressive E Osmose 49-key Polyphonic Synthesizer and MIDI Controller 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 6 merchants for "Expressive E Osmose 49-key Polyphonic Synthesizer and MIDI Controller". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

^* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Edit description

Expressive E Osmose 49-Key Polyphonic Synthesizer and MIDI Controller presents a revolutionary integration of traditional craftsmanship with cutting-edge technology. This standalone instrument is not just a 49-key synthesizer but also a robust MIDI controller. It's the result of a decade-long research, offering an exceptional way to shape sound through unique expressive gestures like press, bend, and more.

The Osmose 49 is powered by the EaganMatrix Sound Engine, a well-respected digital modular engine developed by Haken Audio. It accommodates over 500 diverse presets, offering a wide range of sonic possibilities from warm analog synths to punchy basses. With deep editing features, you can tweak presets or construct your unique sounds from scratch.

The game-changer in this product is the groundbreaking 3D polyphonic aftertouch. This feature offers nuanced control of each key across multiple axes, enabling users to adjust parameters like pitch, filter cutoff, and LFO speed with familiar gestures. This advanced sensing system opens a world of new ways to intuitively shape sound.

Despite its standalone functionality, the Osmose 49 also operates as an efficient MIDI controller. It sends polyphonic aftertouch, pitch bend, modulation and control change messages over USB MIDI, compatible with your preferred DAW or synth.

Key Features:

49-key synthesizer with innovative 3D polyphonic aftertouch
EaganMatrix Sound Engine developed by Haken Audio
Over 500 diverse presets
Deep editing features for sound customization
Functions as a powerful MIDI controller
Sends polyphonic aftertouch, pitch bend, modulation and control change messages over USB MIDI
MPE compatible, transmitting multi-dimensional MIDI data
Sleek design with aluminum chassis, wood side panels, and quality components

Product specs

Type	Standalone Keyboard Synthesizer
Sound Engine	Haken Audio EaganMatrix
Analog/Digital	Digital
Number of Keys	49
Type of Keys	Full-size
Aftertouch	Yes
Velocity Sensitive	Yes
Other Controllers	Pitch/Modulation Sliders
Polyphony	24-voice
Number of Presets	500 Presets with Custom Macros
Effects Types	Reverb, Mod Delay, Echo
Arpeggiator	Yes
Audio Outputs	2 x 1/4" TS (L/mono,R)
Headphones	1 x 1/4" TRS
USB	1 x Type B
MIDI I/O	In, Out/Thru, USB; MIDI Polyphonic Expression
Pedal Inputs	2 x 1/4" (continuous, assignable sustain/synth)
Software	Mac/PC Editor
Power Source	12V, 1.5A Power Supply (included)
Height	3.4"
Width	35.2"
Depth	12.4"
Weight	18.4 lbs.

FAQs

What makes the Expressive E Osmose unique compared to other synthesizers?: The Osmose features a unique polyphonic aftertouch keyboard and the Haken Audio EaganMatrix sound engine, allowing for expressive performance capabilities and deep sound design potential.
How does the Osmose integrate with DAWs?: The Osmose can connect to DAWs via USB and is compatible with MIDI Polyphonic Expression, making it versatile for digital music production environments.
Can the Expressive E Osmose be used as a MIDI controller?: Yes, the Osmose functions as a MIDI controller with full-size keys, velocity sensitivity, and polyphonic aftertouch, enhancing its utility in both performance and studio settings.
Does the Expressive E Osmose come with built-in effects?: The Osmose includes built-in effects such as reverb, mod delay, and echo, allowing users to enhance their sound directly from the synthesizer.
What are the connectivity options for the Expressive E Osmose?: The Osmose offers audio outputs via 2 x 1/4" TS jacks, a headphone output, USB connectivity, MIDI In/Out/Thru, and pedal inputs, providing comprehensive connectivity for various setups.

Videos

Add video

Sanjay C

Expressive E Osmose - 6 Amazing Things it Can Do

Sanjay C

Osmose Synth - Watch before you buy 👀

Mattias Holmgren

Expressive E Osmose Playthrough – Daniel Fisher

Sweetwater

Expressive E Osmose | Deep Dive with Josh!

Chuck Levin's Washington Music Center

Superbooth 21: Expressive E Osmose Expressive Synthesizer & MIDI Controller

SYNTH ANATOMY

Expressive E Osmose Polyphonic Synthesizer In-Depth Review

Music Matter

Expressive E Osmose | Full Demo and Review

Happy Mag

Expressive E Osmose 3D Polyphonic Synthesizer - Overview | Better Music

Better Music

Reviews

Add review

PROS

Keys offer unique expressiveness and tactile feedback
Encourages development of new playing techniques
High quality, solid build suitable for studio use
Provides unique tactile experiences with each patch
Exceptional expressivity comparable to acoustic instruments
Versatile sound editing, though complex, offers powerful customization
Organic sounds that are both analog-like and realistic
Easy navigation through the screen without needing a manual
Enables deep expressive control with poly aftertouch and bending notes
Exceptional as both a synthesizer and MIDI controller with innovative keybed

CONS

Limited synth parameters without software
Software for sound editing is not intuitive or familiar
Power supply design is fragile; prone to issues if bumped
Lack of bidirectional communication between Osmose and editor
Some users find the keyboard action and build quality less solid than desired
Programming and creating new sounds can be complex and time-consuming
Limited to 49 keys, with a desire for larger key versions
Screen visibility and knob responsiveness could be improved
Some firmware features not yet available, pending updates

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Expressive E Osmose 49-key Polyphonic Synthesizer and MIDI Controller.

Comparisons

0 0

The Osmose's keybed feels more intuitive than the Linnstrument, offering easier control over pressure and bending.
Source
0 0

Owners contrast the Osmose with the C15, noting the latter’s superior physical modeling but lack of MPE capabilities and higher price.
Source
0 0

The Osmose's arpeggiator is noted as the most expressive among synths, surpassing many competitors in nuance and control.
Source
0 0

The Osmose's standalone functionality is highlighted as a major advantage over the Seaboard, which requires connection to a computer for its sound engine.
Source
0 0

The Osmose's build quality is perceived as less premium compared to the Roli Seaboard Rise 2 and Linnstrument, which are noted for their substantial feel.
Source

Use cases and applications

0 0

Despite its complex engine, the Osmose is loved for its immediate playability and expressiveness, especially by classically trained musicians.
Source
0 0

Ideal for producing cinematic sounds for movies and video games, delivering a strong emotional impact with expressive capabilities.
Source

Software and compatibility

0 0

Loris Synth is mentioned as a tool for creating custom sounds for the Osmose, enhancing its programmability.
Source
0 0

The Eagan Matrix Editor is available as a standalone app for creating custom patches, but it's noted for its complexity.
Source

User experience

0 0

Owners appreciate the Osmose for its intuitive use in recording and controlling other MPE and non-MPE instruments.
Source
0 0

Users mention that the Osmose feels like a new type of 'acoustic' instrument, requiring subtlety to use all expressions effectively.
Source
0 0

Some owners find the Osmose's industrial design top-notch, stating it looks more expensive than its price suggests.
Source
0 0

Users note that playing the Osmose requires learning new techniques, even for experienced keyboardists, due to its complex interaction dynamics.
Source

Features and functionality

0 0

The Osmose is praised for its ability to mimic guitar-like expressions, such as finger vibrato and pitch bending, appealing to guitarists.
Source
0 0

The Osmose's keys allow for chromatic glissandos using the solid black areas, mimicking the sound of strumming the inside of a grand piano.
Source
0 0

The Osmose is the only piano-like MPE controller with a traditional keybed that incorporates wiggly keys for expressive play.
Source
0 0

The Osmose's Eagan Matrix sound engine is praised for its unique, lively presets but is considered inscrutable and difficult for most to program.
Source

Build quality

0 0

Some users report that the keys wobble and may snag other keys, causing a clicking sound upon release.
Source

Value and pricing

0 0

Refurbished units from Expressive E can be significantly cheaper, often priced around $1250 with a full warranty, offering a cost-effective option.
Source

Critic Reviews

Expressive E Osmose

soundonsound.com

Expressive E's Osmose synthesizer is a revolutionary leap for keyboard instruments, boasting a unique key action that enhances expressivity far beyond conventional synths. The integration of its sophisticated EaganMatrix sound engine delivers rich, diverse tones that are both inspiring and intuitive to play. However, the programming interface can be daunting for newcomers, requiring a willingness to adapt to its unconventional patching system. While the build quality is impressive, occasional non-intuitive interactions with the interface can frustrate users. Overall, the Osmose is a game-changer for musicians seeking new levels of creativity, though it may not suit everyone’s workflow right away.

positive

Full Review

Expressive E Osmose review | MusicRadar

musicradar.com

The Expressive E Osmose synthesizer and MIDI controller offers a promising blend of traditional keyboard aesthetics with innovative features. Musicians will appreciate its easy transition from standard keyboards and the impressive gestural control capabilities. However, the initial setup can be cumbersome and the complex Haken Editor may overwhelm users, particularly those less tech-savvy. Additionally, some bugs linger, suggesting the product may not feel fully polished yet. While it shines in sound design potential and performance, the Osmose still has room for improvement before it can be deemed a complete success.

neutral

Full Review

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

engadget.com

The Expressive E Osmose dazzles with its groundbreaking MPE capabilities and innovative keybed, delivering a unique playing experience. However, it falters as a synthesizer, where its complex EaganMatrix engine can feel more like a confusing puzzle than a user-friendly instrument. While it excels in expressive control, the sound design process is cumbersome and the presets often lack the depth and character expected at this price point. Ultimately, the Osmose shines as a MIDI controller but struggles to fulfill its potential as a standalone synth.

neutral

Full Review

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

attackmagazine.com

The Expressive E Osmose emerges as a revolutionary instrument, fusing traditional keyboard play with groundbreaking expressiveness. Its innovative key design allows for nuanced control, appealing to both pianists and electronic musicians alike. The onboard EaganMatrix engine offers extensive sound possibilities, albeit with a steep learning curve that may challenge beginners. While the build quality is solid, its weight may deter some performers. Additionally, sound quality can be inconsistent, though promising updates and sound packs are anticipated. Priced at £1,555, it's an investment that holds unique potential for composers and live musicians seeking to explore new territories in performance. Ultimately, the Osmose stands out as a distinctive option, but users should be prepared for its quirks.

positive

Full Review

Add review

5.0 out of 5

Based on 1 Review and 1 Rating

5 star

4 star

3 star

2 star

1 star

jerome

349

almost 3 years ago

Exceptional Instrument

Osmose is an exceptional instrument with no equal! Must have for composers and players of all levels wanting more control and fun with their sounds...