
Expressive E Osmose 49 – 49-Key Polyphonic Synthesizer and MIDI Controller
Keyboard ControllersSKU xpeosm49Out of stock. Enquire for availability and updated price.
Let us know you want this one
49-key Polyphonic Synthesizer with Haken Audio Digital Modular Sound Engine, 500+ Presets, 3D Aftertouch, FX, 2 Pitch/Mod Sliders, and Software Editor
Getting it to you
- Delivery — Our courier delivers to the address you give us (2-3 days)
- Collection — Collect from our Menlo Park store
Need a hand choosing? Call our team on 012 991 6077 or pop into the store - we are always happy to help.
Description
Expressive E Osmose 49 – 49-Key Polyphonic Synthesizer & MIDI Controller
After 10 years of painstaking research, Expressive E has emerged with a voltaic blend of historic craftsmanship and cutting-edge technology to revolutionize your approach to keyboard synthesis. Osmose is a 49-key synthesizer whose highly versatile sound engine is fueled by the powerful EaganMatrix, a digital modular engine developed by Haken Audio. Over 500 diverse presets, dazzling onboard effects, and deep editing features barely scratch the surface. What makes the Osmose such a hallmark of synthesizer engineering, however, is its uncompromising approach to total polyphonic aftertouch, enabling three-dimensional control of each key across multiple axes. You can even apply these via comprehensive MIDI controls for MPE use with your DAW or device of choice, and our synthesists couldn’t be more excited to take these compositional possibilities to their outer limits.
Three dimensions of play
Unlike other MPE-capable keybeds, Osmose retains the standard action and feel of a conventional MIDI controller or keyboard. MPE (MIDI Polyphonic Expression) is a MIDI protocol that gives notes independent channels, making it possible to apply pitch bend, modulation, or other expressive control messages to each individual note. Each key has an extended range of motion from its usual resting point, allowing for continued expression through an assigned value. The same applies to each key’s Y-axis, allowing 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 customized for later use, with each of the advanced EganMatrix onboard sounds tailored for use with the unique expressive controls of the Osmose. Plus, the keyboard can be used as an MPE MIDI controller, armed with Multichannel MIDI that will take any sound to a new dimension of play, onboard or otherwise.
Sonic architecture from Haken Audio
Known for its early innovations in multichannel expression with its Continuum Fingerboard, Haken Audio was the perfect partner to bring three-dimensional aftertouch to a new generation of synthesizers. Expressive E’s partnership integrates Haken Audio’s innovative EaganMatrix into the unique workflow of Osmose’s flexible keybed, loaded with more than 500 presets out of the box, with plenty of room to expand. The EaganMatrix digital modular engine perfectly manages the polyphonic aftertouch with each preset crafted to make full use of its unique expression curves and modulation parameters, covering numerous categories of FM synthesis, physical modeling, and more.
Unbridled control
Osmose’s sleek, minimalistic aesthetics are a welcome contrast to its immense sonic prowess. Its controls comprise a handful of ergonomically designed and arranged backlit buttons and textured, clickable knobs. These orbit a vivid, full-color LCD screen, while pitch and modulation sliders are comfortably placed nearby. Its streamlined layout affords deep, uncompromising navigation and editing of each patch, including effects, keybed sensitivity, velocity curves, expressivity, and envelope/EQ values, all with plenty of room to save your presets for later. Osmose also has two ports for continuous pedal use, assignable to sustain or whatever synth parameter you choose, adding another dimension of expression through all 24 voices.
Deep integration
Armed with DIN MIDI in, out, and thru ports, Osmose is an extremely capable controller. Take its uncompromising, multidimensional control to your preferred DAW. Multichannel MIDI lets you explore your favorite sounds like never before. Two 1/4-inch TS pseudo-balanced line outputs handle full stereo playback, while a 1/4-inch TRS headphone jack is front-mounted for convenient solo play with its own volume adjustment. Thoughtful design includes a lockable connector for the external power supply, too! While Osmose is an incredibly capable synth with a near-limitless depth of onboard control, the accompanying EaganMatrix editing software from Haken Audio allows you to dive even further into the uncharted depths of its unique synthesis architecture, creating and fine-tuning sounds to perfectly match your output.
Expressive E Osmose Features:
- 49-note keybed features 3D control for new modes of expressivity
- Polyphonic aftertouch includes extended vertical range and horizontal modulation per key
- Partnership with Haken Audio means EaganMatrix digital modular engine powers the onboard sounds, tailored for use with MPE and polyphonic aftertouch
- 500+ presets and 24 maximum voices enable versatile playing across any style
- Streamlined, minimalistic interface reduces clutter without compromising accessibility
- Pitch/modulation sliders, responsive buttons, a fine-tunable knobs provide tactile satisfaction with superlative control
- Deep onboard controls ensure patches are easily edited, saved, and recalled for personalized use
- Patches can be individually modified to customize velocity curves, sensitivity, expressivity, FX, and more
- DIN MIDI in/out/thru allows Osmose to be used as an MPE MIDI controller to revolutionize your sonic exploration with your preferred DAW or instrument
- Pseudo-balanced 1/4-in. TS outputs reduce noise with flexible stereo operation
- Front-mounted 1/4-in. TRS headphone output features a dedicated volume adjustment
- External PSU includes a lockable connector to avoid unwanted disruptions
- Accompanying Haken Audio software allows you to engage greater levels of depth, control, and fine-tuning of the EaganMatrix: Mac/Win
Tech 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.
Learn more about
View more at OneStopMusic
Why Buy From OneStopMusic
At OneStopMusic, we’re passionate musicians and audio experts dedicated to helping you find the perfect gear. We offer a massive selection of premium musical instruments, music technology, professional audio equipment, and accessories from the world’s top brands.
Get honest expert advice, competitive prices, fast delivery, and outstanding service from a team that truly understands music. Whether you’re buying your first guitar or building a professional studio, we make sure you get the right equipment at the right price — every time.
Shop with confidence at OneStopMusic — your trusted one-stop music store.
How it compares
You are viewingExpressive E Osmose 49 – 49-Key Polyphonic Synthesizer and MIDI Controller
- Brand — Expressive E
- Price — R35 915,00
- Category — Keyboard Controllers
Novation FLkey 37 Keyboard Controller for FL Studio- Brand — Novation
- Price — R5 295,00
- Category — Keyboard Controllers
Arturia KeyLab Essential mk3 61-key Keyboard Controller – Rose Quartz- Brand — Arturia
- Price — R5 359,00
- Category — Keyboard Controllers
Complete Your Order

Everything here is included. Untick anything you do not need — your saving follows the bundle into your cart.
Adding 4 items for R55 654,00 - you save R1 795,00.
OR
Build Your Own BundleYou may also like
Have any questions?
We've got answers.Get personalized product picks, technical advice and rig recommendations from a dedicated gear expert — entirely for free.

Join the OneStopMusic newsletter
Gear guides, new arrivals and members-only deals — straight to your inbox.
Express National Delivery
We deliver anywhere in SA.
Secure Payment
Card, Payflex or EFT — all secure.
Store Opening Hours
Mon-Fri 9am-5pm · Sat 9am-2pm · Sun closed
Expert Advice
Real musicians behind the counter.















