Expressive E Osmose 61
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When you purchase this product between 15.07.2026 and 15.10.2026, you receive a free 30-day full trial of Syntorial, the interactive ear-training software for synth programming.
Instead of just watching videos, you recreate leads, basses, pads and more. Get instant feedback as you learn how oscillators, filters, modulation and effects work together to create real patches.
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Polyphonic Synthesizer
- With multi-dimensional keyboard
- Innovative 61-key keyboard – each key can individually process velocity, aftertouch and pitch bend
- 24-voice polyphonic
- Haken Audio EaganMatrix Sound Engine: Freely programmable modular synthesiser with five oscillators, five multimode filters, five envelopes, noise generators, two filter banks, four delays and much more
- Supports sound generation methods such as physical modelling, FM, subtractive and additive synthesis and more
- Built-in effects: Reverb, delay, compressor, EQ
- Operating modes: Stand-alone synthesizer, MPE MIDI controller and regular MIDI controller
- Memory locations for 500 presets
- MPE arpeggiator
- LCD colour display and six encoders
- Pitch and modulation sliders
- Buttons for octave and preset selection
- Stereo outputs: 2 x 6.3 mm jack
- Stereo headphone output: 6.3 mm jack
- Pedal inputs: 2 x 6.3 mm jack
- USB-B port
- MIDI input and output
- Dimensions (W x D x H): Approx. 1060 x 316 x 87.5 mm
- Weight: 9.5 kg
- Includes external power supply (12 V DC, 1.5 A)
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Available since November 2025
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Item number 619267
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Sales Unit 1 piece(s)
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Number Of Keys 61
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Touch-Sensitive Yes
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Aftertouch Yes
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Split Zones No
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Modulation Wheel Yes
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Number of simultaneous Voices 24
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Sound Engine Digital
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MIDI interface 1x In, 1x Out
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Storage Medium Internal
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USB-port Yes
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Effects Yes
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Arpeggiator Yes
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Number of Analog Outputs 2
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Digital Output No
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Display Yes
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Number of Keys 61
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Pitch Bend / Modulation Yes
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Rotary Encoder 6
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Fader (Amount) 2
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Pads 0
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Sustain Pedal Connection Yes
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Mains Operation Yes
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Pedal Connections 2
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Dimensions 1060 x 316 x 87.5 mm
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Width in mm 1060
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Height in mm 87
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Weight 9,5 kg
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Depth in mm 316
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Weight in kg 9,5 kg
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Special Features multidimensional Keyboard
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An expanded 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 61 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 in extraordinary depth, with each of the advanced EganMatrix onboard sounds tailored for use with the unique expressive controls of the Osmose. With its five-octave layout, the instrument is also better suited to two-handed playing than the 49-key version.
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3D keyboard with five octaves
The semi-weighted keys of the unique Osmose keybed are equipped with additional sensors that convert horizontal movements and the position of the finger on the key surface into control signals. This allows for playing techniques such as shake, strum, and pressure glide that are otherwise not possible on conventional keyboards. In turn, pitch bend and dynamic sound changes can be generated simultaneously with the notes being played. Aftertouch, pressure, and pitch bend can even be applied polyphonically. The 24-voice sound engine is a version of Haken Audio's EaganMatrix specially adapted for the Osmose. It can generate FM, virtual-analogue, and physical modelling sounds, with parameters freely assignable to the keyboard's various sensors. This allows performers to transport articulation and nuance with remarkable precision.
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Elevated expression
Expressive E's Osmose 61 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 musical expression. Its dynamically playable tones can be used equally well for electronic music, Pop, Jazz, Fusion, or Hip-Hop. Live on stage, keyboardists can perform unusually expressive solos; in the studio, synthesizer parts can be worked on in unprecedented detail. Despite the additional octave, the Osmose 61 weighs only around 1kg more than its predecessor and remains easy to transport. At the same time, the expanded keyboard better accommodates the playing styles associated with instruments such as electric pianos and polyphonic synthesizers. The Osmose can also be used with software instruments, including the Soliste series from Expressive E, releasing their full musical potential.
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About Expressive E
Expressive E is an innovative French company specialising in the development of cutting-edge interfaces that allow musicians to express their creativity to the fullest. The brand, whose mission statement is to enable a more intuitive, dynamic, and emotional interaction between humans and machines, first made its name with the Touché Controller, which allows users to control hardware and software-based synthesizers via hand gestures and is now accompanied by Expressive E’s proprietary Lié software as well as a whole palette of plugins with physical modelling and an ever-expanding selection of sound sets, some of which are also available free of charge. Expressive E brings together musicians, developers, and designers in a creative team with one common goal: To re-imagine musical expression for the digital age. Users can therefore (unsurprisingly) expect many more products from Expressive E in the future that continue to open up new creative possibilities beyond those offered by conventional interfaces.
More expressive than ever before
With Expressive E's Osmose 61, experienced keyboardists can perform highly expressive parts that rival the presence and complexity of a virtuoso guitarist or passionate saxophonist. Thanks to the combination of its innovative playing techniques and flexible sound engine, keyboard performances can hold their own alongside acoustic instruments in a live setting without the need for additional equipment. While the Osmose requires a certain learning curve in order to master its unique capabilities and techniques, the ability to apply separate pitch bends or glide on individual notes of a chord can elevate the interplay with other musicians to new heights. The Osmose 61 can also serve as an MPE controller in the studio, making it an excellent way to perform modern plug-ins that support advanced expressive control and polyphonic aftertouch.
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In the spotlight
EaganMatrix
The EaganMatrix, a modular digital synthesizer developed by Haken Audio, draws inspiration from classic analogue matrix synths like the ARP 2500 and EMS Synthi 100. Unlike those instruments, however, EaganMatrix replaces fixed pin connections with live formulas – allowing each connection in the matrix to carry a dynamic equation, letting a single gesture on the keybed reshape multiple parameters simultaneously rather than triggering one fixed response. The engine's module set includes summation oscillators, multimode filters, and time‑delay networks that also serve as the basis for waveguide physical modelling; biquad filter banks further extend its capabilities into granular and additive synthesis. Deeper editing is handled in the Haken Editor, where the full matrix – sources, destinations, and formulas alike – is exposed beyond the front panel's reach.
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