Expressive E Osmose 49-Key Synthesizer & MPE MIDI Controller

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Expressive E Standalone Expressive Synthesizer and MPE MIDI Controller Keyboard with EaganMatrix Digital Sound Engine by Haken Audio and 49 Full-Size Keys with Three-Dimensional Control

Expressive E Osmose is the new standard for musical expressivity. Use intuitive gestures to control this standalone synthesizer and upgrade your playing and production skills. Press, bend, shake, strum and more to interact with keyboards and electronic sounds in a new, organic way. Whether you're a veteran keyboardist, a workflow-oriented producer, a daring sound designer or anything in between, Osmose will take your musical journey to uncharted places.

  • 49 full-size keys with three-dimensional control
  • Standalone synthesizer, MPE MIDI controller and classic MIDI controller
  • EaganMatrix digital modular sound engine by Haken Audio with up to 24 voices of polyphony
  • Large color LCD screen with ergonomic user interface
  • Sleek and rugged design

Explore new ways to play

Combining traditional craftsmanship with modern technology, Expressive E Osmose is the result of more than 10 years of research and development as well as feedback from world-class artists. Osmose introduces new physical gestures, allowing musicians to interact with sounds and produce music. It does this while not only respecting, but also enhancing the player's existing keyboard skills. Every note can be articulated independently with unique expressive possibilities.

EaganMatrix sound engine

Offering new levels of expressivity required a seamless interaction between Osmose's unique keybed mechanism and its sound engine. Logically, Expressive E has partnered with Haken Audio to integrate its powerful EaganMatrix sound engine with Osmose. Its modular sound engine combines many types of digital synthesis including physical modeling, FM and more, making it a workflow-oriented soundbox. Osmose ships with more than 500 presets, each of which has been manually customized with efficient macros that open new realms of sound exploration.

A playful playing experience

All the internal sounds in Osmose's large library are tailor-made to take advantage of its unique keybed. Osmose's unique sound identity is a combination of highly detailed acoustic, electronic and hybrid sounds that will easily add nuances and variations to any music genre. These sounds were carefully crafted to react to a player's slightest movements and make use of the keys' three-dimensional sensitivity in a unique way to create effects such as strummed notes, vibrato, legato, layered dynamics and much more. As a result, discovering and controlling Osmose's sounds is refreshing and fun!

Built to empower external synths

On top of being a traditional MIDI keyboard controller, Osmose can also interface with computers and other instruments as an MPE MIDI controller. It also offers polyphonic aftertouch support, a multichannel MIDI mode and global pitch bend. All of these changes can be made directly from the Osmose interface with no need for a computer.

UI/UX design

Osmose's custom, in-house operating system facilitates sound creation: no endless menu browsing, no constant 'shift button' operating. Expressive E boiled down the feature set to its quintessence and added to the mix a large color screen, 500 macro-loaded presets and efficient categorization. The sound browser offers various filters and sub-filters based on both sound types and colors so you can find the sounds in your head quickly.

Simple to tweak

With Osmose it's easy to customize the timbres, textures and effects of all presets. Give macro controls a simple twist to tweak multiple pre-mapped parameters at once. Each of the 500 included presets is equipped with macro controls to generate deep, satisfying changes without effort.

A.K.A. Augmented Keyboard Action

Developed by Expressive E, Augmented Keyboard Action (A.K.A.) is the technology inside every key of Osmose; it offers a seamless connection between every gesture played by the musician and the resulting sound. This means that despite being an electronic synthesizer, Osmose feels more like an acoustic instrument to play. Press, bend, shake, strum and more to create sounds that are truly yours.

3-axis motion for every key

  • Extended polyphonic pressure: sound is produced as soon as you brush the keys with an incredible level of nuance and dynamics.
  • High-resolution polyphonic aftertouch: past a certain pressure threshold, a new sound variation is triggered with a tremendous level of control and dynamics.
  • Polyphonic pitch control: add vibrato to notes and bend them by intuitively shifting keys left and right. Each key's pitch variations can be independent.

Custom sensitivity

Whether you want full expressivity or a classic piano feel, Osmose adapts to you by offering custom sensitivity curves for each gesture.

Playing options

Osmose's MPE arpeggiator has the classic parameters you would expect, but also gesture-triggered modulation on every note. Osmose also features 'press glide,' which allows you to dynamically control glide time between notes.

Design and build quality

Proudly designed in France, Osmose boasts a stealth black casing and signature key stems that will both please crowds and stand the test of time. Made out of rugged materials and assembled in a solid glueless design, Osmose is a road- and studio-ready instrument.

More Information
Manufacturer Expressive E
Condition New
Included from Manufacturer Power supply with international adapters
USB cable
Analog/Digital Digital
Number of Keys 49
Weighted Keys Semi-Weighted
Key Action Full-size keys with three-dimensional control
Aftertouch Yes
Programs/Presets 128 user presets in banks of 16
Over 500 system presets
Voices of Polyphony Up to 24 voices
Oscillators per Voice Varies by Sound Engine
Effects 5 × versatile multmode filters
2 × biquad filter banks
Time delays with controls for audio input and time, suitable for creating chorus and flanging effects as well as echo delays
MIDI In, Out/Thru, USB
USB Port (to Host) MIDI, System Updates, Editor/Librarian/Patch Manager
Audio Outputs Dual 1/4" stereo TRS pseudo balanced outputs
1/4" stereo headphones output
Onboard Controllers Pitch and modulation sliders
Width 35.2"
Depth 12.4"
Height 3.4"
Product Weight 18.4 lb
Unique Features
  • Standalone synthesizer, MPE MIDI controller and classic MIDI controller
  • EaganMatrix digital modular sound engine by Haken Audio with up to 24 voices of polyphony
  • Large color LCD screen with ergonomic user interface
  • Sleek and rugged design

Expressive E Warranty Statement

All Expressive E hardware products are sold with a 12-month warranty after the date of purchase. This limited warranty is offered solely to products purchased from an authorized Expressive E reseller.

In the event of a manufacturing defect becoming evident during the warranty period, Expressive E will ensure that the product is repaired or replaced free of charge. A manufacturing defect is defined as a defect in the performance of the product as described and published by Expressive E. A manufacturing defect does not include damage caused by post-purchase transportation, storage, or careless handling, nor damage caused by misuse.

In the case of operational interruption, please always contact Expressive E technical support first. This avoids unnecessary returns (it might not be a hardware defect) and it makes the follow-up of your case easier. Please note that while this warranty is provided by Expressive E as a manufacturer, if a replacement is needed, this will normally be organized via the reseller the unit was bought from (who will in turn be compensated by Expressive E or one of its distribution partners).

  • Ground shipping is FREE for all orders $99 and up.
  • Our central, midwest location ensures fast delivery times.
  • See below for transit day estimates. Please note, these are estimates and are not guaranteed.

Generally, package estimated transit days are as follows:

  • Upper Midwest: 1-3 days
  • Central US, South East US, and East Coast: 2-4 days
  • West Central US: 3-5 days
  • West Coast: 4-6 days
  • Alaska & Hawaii: 7+ days
All transit times are based in business days. Please allow 7-10 business days for most freight shipments. Business days are Monday through Friday and do not include public holidays and weekends (Saturday/Sunday.) For questions regarding estimates to your specific location, please contact us at [email protected] or 800-783-3368.