I am selling a brand new Expressive E Osmose 61 officially sourced from the factory. Feel free to contact me for inquiries and to place an order. Below are additional terms in my store and a description of the device.

• All products are officially sourced from the vendor or distributor.
• I provide a minimum 3‑year warranty on all products, or longer depending on the type of product.
• Most products are available for testing on demand in the showroom in Warsaw.
• Every customer in Europe is entitled to a 30‑day return policy. This option doesn’t cover customers abroad EU.

Expressive E Osmose 61 is a next‑generation 61‑note polyphonic synthesizer and MPE MIDI controller based on Expressive E’s multidimensional keybed with per‑note gesture sensing for velocity, press, aftertouch, pitch bend, pressure glide, and vibrato. It expands the range of the original model with a full five‑octave layout suited for two‑hand performance, complex arrangements, and deep expressive control.  

Powered by the EaganMatrix sound engine developed with Haken Audio, Osmose 61 supports up to 24 voices of polyphony and integrates physical modeling, FM, subtractive synthesis, and hybrid digital modalities with onboard effects including reverb, delay, compressor/drive, and EQ. The interface combines a large colour display, six encoders, pitch and modulation sliders, and dedicated octave/preset controls for direct editing and sound navigation.  

Osmose 61 functions as a standalone synthesizer or as an MPE/MIDI controller via DIN and USB connections, with two continuous pedal inputs for expression and performance modulation. Stereo line outputs and a dedicated headphone output provide flexible routing for studio and live setups. Factory libraries exceed 500 presets and support up to 2048 user slots, with ongoing firmware updates and expanding software ecosystem.  

Key features

• 61 full‑size, fully expressive multi‑dimensional keybed with per‑note gestures

• MPE and classic MIDI control modes with polyphonic aftertouch

• EaganMatrix sound engine by Haken Audio with hybrid synthesis

• Up to 24 voices of polyphony

• Built‑in effects: reverb, delay, compressor/drive, EQ, convolution engines

• Large colour LCD with tactile encoders and dedicated performance controls

• Two continuous pedal inputs (assignable)

• MIDI DIN In/Out/Thru and USB‑B for DAW/gear integration

• Stereo main outputs and headphone output

• 580+ factory presets, 2048 user preset slots

• Developed for expressive performance and deep sound design

Technical specifications

• Keys: 61 full‑size gesture‑sensitive

• Polyphony: up to 24 voices

• Sound engine: EaganMatrix (physical modeling, FM, subtractive, hybrid)

• Effects: reverb, delay, compressor/drive, EQ, post/pre effects routing

• Presets: 580+ factory, 2048 user slots

• Display: full‑colour LCD

• Controls: 6 encoders, pitch/mod sliders, octave/preset buttons

• Outputs: 2 × ¼″ TRS line, 1 × ¼″ TRS headphone

• MIDI: DIN In/Out/Thru, USB‑B

• Pedal inputs: 2 × continuous (assignable)

• Power: external 12 V DC, 1.5 A

• Dimensions: approx. 1060 × 316 × 87.5 mm

• Weight: approx. 9.5 kg

• Warranty: 3 years