Expressive E Osmose


Polyphonic Synthesizer

  • With multidimensional keyboard
  • New 49-key keyboard - each key can handle velocity, aftertouch and pitch bend individually
  • 24-Voice polyphony
  • Haken Audio EaganMatrix Sound Engine: freely programmable modular synthesizer with 5 oscillators, 5 multimode filters, 5 envelopes, noise generators, 2 filter banks, 4 delays and much more
  • Supports sound generation methods like physical modelling, FM, subtractive and additive synthesis and more
  • Built-in effects: Reverb, Delay, Compressor, EQ
  • Operation modes: standalone synthesizer, MPE MIDI controller and regular MIDI controller
  • Memory for 500 presets
  • MPE arpeggiator
  • LC colour display and 6 encoders
  • Pitch and modulation slider
  • Buttons for octave and preset selection
  • Stereo output: 2x 6.3 mm jack
  • Stereo headphone output: 6.3 mm jack
  • Pedal inputs: 2x 6.3 mm jack
  • USB-B port
  • MIDI in / out
  • Dimensions (W x D x H): 894 x 316 x 87.5 mm
  • Weight: 8.3 kg
  • Incl. external power supply (12 V DC, 1.5 A)
  • Matching bag available: art. no. 559487 (not included)
Available since January 2023
Item number 557647
Sales Unit 1 piece(s)
Number Of Keys 49
Touch-Sensitive Yes
Aftertouch Yes
Split Zones No
Modulation Wheel Yes
Number of simultaneous Voices 24
Sound Engine Digital
Storage Medium Internal
USB-port Yes
Effects Yes
Arpeggiator Yes
Number of Analog Outputs 2
Digital Output No
Display Yes
Pitch Bend / Modulation 1
Rotary Encoder 6
Fader 2
Pads 0
Sustain Pedal Connection 1
Mains Operation 1
Pedal Connections 2
Dimensions 894 x 316 x 87.5 mm
Weight in kg 8,3 kg
Weight 8,3 kg
Special Features Multidimensional Keyboard
Show more
The shipping costs are calculated on the checkout page.
In stock
In stock

This product is in stock and can be shipped immediately.

Standard Delivery Times

A new way to play

What good is the greatest sound engine if its functions can't be controlled dynamically and intuitively while playing? Conventional keyboards with velocity and aftertouch offer too few options to achieve this, and their reliance on knobs, hand wheels, pedals, or breath controllers means too much attention is taken away from actually playing. This is exactly where the Expressive E Osmose comes in: Its innovative keyboard design unlocks new ways to control sound with gestures (press, bend, shake, and more) that bring a level of control usually associated with acoustic instruments. Each key has an extended range of motion from its usual resting point, which allows for additional per-note modulation whose range and target parameters can be modified with each patch and sound. Aftertouch sensitivity profiles and response curves can be customised for later use, with each of the advanced EganMatrix onboard sounds tailored for use with the unique expressive controls of the Osmose. This gives the term "expression" a whole new dimension for keyboard players.

Expressive E Osmose

Synthesizer with 3D keyboard

The semi-weighted keys of the keybed are equipped with additional sensors that convert horizontal modulations and the position of the finger on the surface of the key into control signals. This allows for playing techniques such as shake, strum, and pressure glide that are otherwise not possible on conventional keyboards and means that pitch bend and dynamic sound changes can be generated simultaneously with the notes played. Aftertouch, pressure, and pitch bend can even be used polyphonically! The 24-voice sound engine is a version of Haken Audio's EaganMatrix specially adapted for the Osmose and can generate FM, virtual-analogue, or physical modelling sounds. The parameters of the Pitch Bend Slider and the Modulation Slider are programmed individually in each preset.

Expressive E Osmose, detailed view

Elevated expression

The Expressive E Osmose is aimed at experienced keyboardists who have reached the limits of their existing instrument. Supported by its advanced sound engine, the 3D keyboard opens up completely new modes of expressing musical ideas, and its dynamically playable tones can be used equally well for electronic music, Pop, Jazz, Fusion, or Hip Hop. Live on stage, keyboardists can play extremely expressive solos and in the studio, synthesizer parts can be worked on in unprecedented detail. The Osmose can also be used as a controller for other synthesizers and plug-ins.

Expressive E Osmose, Polyphonic Synthesizer

About Expressive E

Expressive E is a small and relatively young French manufacturer. Its flagship products are the Touché controller and the associated Lié software. Expressive E also makes a small series of plugins which emulate the physical vibrations of acoustic instruments, or model electronic circuitry. In addition, the manufacturer offers soundsets for various hardware and software synthesizers, most of which are free and designed to work in conjunction with the Touché controller.

Polyphonic synthesizer

For keyboard solos that truly stand out

With the Expressive E Osmose, experienced keyboardists can play highly expressive parts that rival the complexity and articulations of a virtuoso guitarist or passionate trumpeter. With the innovative 3D keyboard and flexible sound engine, keyboard passages on the Osmose can hold their own alongside acoustic instruments in a live performance without the need for additional equipment. While the Osmose requires a certain learning curve in order to master its unique capabilities, the ability to apply separate pitch bends or "pressure glide" with individual notes of a chord can elevate the interplay with other musicians to new heights. The Osmose can also be used as a MIDI controller in the studio, for example to play modern plugins that are designed for MPE and polyphonic aftertouch.

13 Customer ratings

4.8 / 5

You have to be logged in to rate products.

Note: To prevent ratings from being based on hearsay, smattering or surreptitious advertising we only allow ratings from real users on our website, who have bought the equipment from us.

After logging in you will also find all items you can rate under rate products in the customer centre.





10 Reviews

Game changer!
Martin475 02.02.2024
Love this keyboard!
It’ has a completely different action to the normal keyboard feel. But once you get used to it it’s extremely expressive.
The keys throw you at first because although it has a traditional look it’s not really a normal keyboard experience .
I love the overall sound. It’s organic but not brittle. Capable of sounding analog or real instruments but more interesting is somewhere in between.
The screen is extremely easy to navigate without a manual. The Macros give control over important elements in the sound.
Really well built with tight pots and keyboard action doesn’t feel it’s going to break anytime soon.
There is one thing to be taken into account at the moment.
I knew the software would be difficult to use but was shocked to find out there isn’t proper bidirectional communication between Osmose and editor.
When you change something in the editor it doesn’t update screen on Osmose.
When you turn Macros on Osmose they don’t turn in editor. This a major flaw at the moment. I’ve heard they’re aware of it but sync between editor and Osmose is an important feature.
Similar to the Nord Modular’s and every other editor I’ve used for 30 years.
But even with this problem I’d still highly recommend it.
Thomann as usual were extremely efficient and quick in shipping.
Number one selling synthesiser on Thomann!
Who would have thought.


5 months wait but definitely worth it
Pure Mint 17.12.2023
I cannot rate this high enough - only arrived yesterday and simply plugged in and played with the presets (first 4!) for about an hour and had already been inspired to write a new tune within minutes. That then sidetracked me whilst I tracked some other instruments. It is like playing a violin or a guitar after simple keyboards. I am a pianist by training so maybe this suits me but I didn’t find it too hard to play. Gentle polyphonic after touch swells and then bending notes individually or in chords. You end up drifting into the music - a truly revolutionary keyboard. I know programming will be a pain and hopefully sooner or later they will come up with an easier editor but I’ll leave that for another day. But it sounds lush. Recommended and definitely with the 5 months wait it took to get it


Very musical instrument
Nader 19.03.2024
This instrument is beyond anything I have experienced in keyboards. So musical instrument, feels like playing alive instrument. Overall it is very good instrument, I just hoped that the build quality was a bit more solid. It's fine nothing to be scared of but I feel the Keybed is a bit wobbly more than it should. Maybe I need to get used to it.
The sound and the library is high quality and plenty of good sounds at your finger tip.
The only thing I wasn't happy with was the shipping, it arrived luckily in two boxes and the outer box was damaged.
Thomann team were very helpful and immediately informed me to not accept the shipment. I suggested to have a look at the keyboard and to check for any damages, luckily everything was OK. I took it home and turned ON the Osmose and it was fully functional with no sign of any damage. Thank you Thomann for double boxing it.


google translate de
Unfortunately there was an error. Please try again later.
Einzigartige Neuheit
mayan 29.07.2023
Dieser Synth zeichnet sich nicht nur durch die fantastische Klangsynthese dank Haken Audio's Eaganmatrix, sondern auch durch das weltweit erste Keybed seiner Art aus.

Die Tastatur erkennt schon kleinste Berührungen, sodass sich die Sounds präzise kontrollieren lassen. Fast alle anderen Synths haben ein Menü zum Anpassen der ADSR Hüllkurve - so aber nicht das Osmose. Hier sind die Finger die Hüllkurve, da man direkt durch die Tiefe der gedrückten Taste die Lautstärke bzw Klangfarbe kontrolliert. Jede Taste ist hier bei Bedarf unabhängig voneinander ansteuerbar, sowohl in der Velocity als auch im Aftertouch und der viel umworbenen links-rechts Bewegung. Allein als Controller mit polyphonen Aftertouch lohnt sich Osmose schon. Der ausschlaggebende Grund für meinen Kauf war jedoch die Funktion, dass man Tasten auch nach links und rechts bewegen kann. Das fühlt sich sehr natürlich an und erlaubt es individuelles Vibrato auf die einzelnen Tasten zu legen. Sobald man wieder auf einer normalen Tastatur unterwegs ist, merkt man erst, wie sehr einem diese Funktion fehlt.

Osmose kann einerseits als Controller fungieren (in mehreren Modi: MPE, Polyphonic Aftertouch, Multichannel und Classic Keyboard), aber auch die interne Klangsynthese ansteuern, sodass es auch als eigenständiges Instrument stehen kann. Natürlich entweder mit Kopfhörern oder externen Lautsprechern - interne Lautsprecher hat das Gerät nämlich nicht.

Zu den Sounds: Osmose liefert hier eine gute Bandbreite an Presets, von Mallets ĂĽber Strings zu Orgeln und abstrakten Percussions ist so ziemlich alles vertreten. Man muss aber auch sagen, dass alle Sounds typisch Eaganmatrix sind - nach hyperrealistischen Abbildungen echter Instrumente sucht man hier vergebens.
Weiterhin ist die Bearbeitung der Sounds auf die Makros begrenzt, außer man verbindet Osmose mit einem Computer über USB. Dann steht einem der Haken Editor zur Verfügung, mit welchem man von Grund auf eigene Sounds basteln kann. Der Einstieg in den Editor ist aber bei Weitem nicht einfach - die Benutzeroberfläche wirkt nicht sonderlich professionell oder aufgeräumt und eher wie ein Programm, für welches man bei der Entwicklung dabei gewesen sein muss, um es zu verstehen. Viele Parameter sind unbeschriftet oder durch Abkürzungen nicht klar verständlich. Ohne das mitgelieferte Manual wäre ich hier aufgeschmissen.

Die Verarbeitung des Osmose ist grundsolide. Die Tasten fühlen sich wertig und die Oberfläche stabil an. Zwar hat man hier vergleichsweise wenig Oktaven (4 an der Zahl), allerdings stört das im Gebrauch eher selten, da auch Tasten zum Oktavenwechsel bereitstehen. Das Display könnte etwas kontrastreicher aus ungünstigen Blickwinkeln sein, allerdings ist das eher ein kleines Problem. Die Drehregler sind zeitweise etwas langsam, sodass man bei bestimmten Werten ziemlich kurbeln muss. Eine Transposition der Tastatur um Halbtöne, statt ganzen Oktaven, sucht man vergebens. Dies kann leider maximal über den Haken Editor am Computer für jedes Preset einzeln eingestellt werden.

Einige Funktionen sind in der Firmware noch nicht verfügbar, sollen aber demnächst nachgeliefert werden. Die Verpackung war einwandfrei - gleich 3 Kartons ineinander mit ausreichend Schaumstoff verpackt.

Abschließend lässt sich sagen, dass man hier für das Geld eine Weltneuheit bekommt, welche hoffentlich in der Zukunft auch bei anderen Firmen Anklang findet. Wenn man die derzeit lange Lieferzeit verkraften kann (bei mir waren es knapp 8 Monate), lohnt sich die Investition allemal.