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Expressive E Osmose 49-Key Augmented Keyboard Synthesizer

Standalone synthesizer, MPE MIDI controller, and classic MIDI controller featuring 49 full-size keys with three-dimensional control and EaganMatrix - a digital modular engine by Haken Audio


Product Description

Combining traditional craftsmanship with modern technology, the 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.


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, and each of them has been manually customized with efficient macros that open new realms of sound exploration.


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!


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.


  • 49 Key MPE keyboard with polyphonic aftertouch
  • Full-size keys with 3-dimension MPE control
  • EaganMatrix sound engine by Haken Audio: a digital modular sandbox allowing subtractive, fm and different physical modeling synthesis
  • 24 voices of polyphony
  • Assignable mod and pitch sliders
  • 500 factory presets
  • 128 user presets
  • Configuration modes: standalone synthesizer, MPE MIDI Controller, and classic
  • MIDI Controller
  • Filters and sub-filters for browsing
  • Customizable sensitivity and velocity curves
  • Multi-mode MPE arpeggiator and innovative pressure glide feature
  • Digital stereo effects: select between reverb, mod delay, swept echo, analog echo or LPF and HPF delay
  • Large color display
  • 9 push encoders
  • 2 Line outputs: Two ¼" TS pseudo balanced line outputs
  • MIDI input, output, and MIDI-thru
  • Separated ¼" TRS headphone output on the front panel (with its dedicated volume knob)
  • 2 continuous pedal inputs assignable to macro or sustain: 6.35 mm Jack
  • Power: External PSU with lockable connector, 12V, 1.5A, center positive
  • Includes a software updater for new firmware and library versions
  • Includes a Mac/PC editor to create and edit sounds

Product Specifications

Condition New
Width 35.2 in
Height 3.4 in
Depth 12.4 in
Unit Weight 18.4 lb
Output Connectors 1/4-inch TRS, 1/4-inch TS
MIDI Connections In, Out, Through
Analog or Digital Digital
Number of Keys 49
Synthesizer Format Keyboard
Polyphony Up to 24 voices

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I would like to thank VK for the wonderful sales assistance, service and prices. This was my first purchase with you and it won't be my last. I only wish I'd discovered you years ago!
Matthew R.
I had two Grammy wins this year - Ray LaMontagne & Carolina Chocolate Drops. Both made with help from Vintage King!
Ryan F.
In almost 20 years in Pro audio buying, never did I receive a unit so well packed and exactly as described. Works flawlessly. The whole process has been so smooth. I will never hesitate to do business with you guys in the future and will recommend you to everyone I know.
Martin C.
This was my first experience buying something from Vintage King (although I surf the "used" categories on the website frequently!), and, despite being on the other side of the world, I had absolutely no trouble and everything went very smoothly.
Phil T.
The speed of delivery exceeded my expectations! I was VERY pleased that my shipment arrived in time for a scheduled vocal tracking session. The packing insured that my order arrived safely. And the sales staff responded quickly to questions regarding the product.
James P.
Thank you so much! Vintage King has been so fair and easy to work with. I can't thank you enough. It feels good to trust such a hefty purchase to folks who are so helpful and knowledgeable. Vintage King is a sound designers dream store.
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My experience with Vintage King was excellent. The order was here fast considering it was out of stock. The sales person had SKB send it to me directly and I couldn't have been more pleased.
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From the minute I placed my order I was kept well-informed through each step in your process. Even though I was buying a comparatively modest piece of gear, your attention to detail made me feel like I was purchasing a six-figure mixing desk.
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Better than expected! Truly impeccable service. Your team was professional, knowledgeable, provided speedy delivery above and beyond standard. Vintage King Audio is definitely my go to for all of my audio and information needs.
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