UDO Super 6 Keyboard ST49 Synthesizer White

UDO Super 6 ST49 — 12-Voice Binaural Analog-Hybrid Synthesizer with Polyphonic Aftertouch

The UDO Super 6 ST49 is a 12-voice polyphonic analog-hybrid keyboard synthesizer that pairs FPGA-powered digital oscillators with a voltage-controlled analog filter and VCA stage. This ST49 edition ships with the SuperTouch 49 keybed factory-installed, giving the player full polyphonic aftertouch on every one of the 49 semi-weighted Fatar keys. Each key transmits its own independent pressure stream, so a held chord can be accented note-by-note rather than as a single global value. In binaural mode, the twelve voices twin into six stereo "super voices," assigning a complete synth voice to each ear for spatial movement that ranges from subtle detuning to extreme 3D width. A flagship instrument for hands-on players who want deep modulation and an unmistakably wide stereo image in a single keyboard.

Binaural Stereo Architecture and SuperTouch 49 Polyphonic Aftertouch

Two features set this instrument apart from conventional polysynths. The binaural analog signal path lets the left and right channels of each super voice be detuned, de-phased, and modulated independently — a routing rarely found outside UDO's own Super Series. The SuperTouch 49 keybed is a complete Fatar keybed replacement with weighted action and per-key polyphonic aftertouch, allowing expressive gestures impossible on a standard channel-aftertouch keyboard. Combined with the 7-core super-wavetable oscillator and the SSI2144 analog four-pole filter — the same chip used in Sequential's Prophet X — the architecture bridges modern wavetable power with classic analog character.

Sound Engine — FPGA Oscillators and Analog Filter

The hybrid voice architecture is the heart of this instrument. Two FPGA-based oscillators feed into an all-analog VCA and filter stage, giving the player both the precision of digital wavetables and the warmth of voltage-controlled analog processing.

• Polyphony: 12 voices (standard) / 6 super voices in Binaural mode — generous headroom for chords, with binaural mode trading voice count for true stereo imaging.
• Main Oscillator: 7-core Super-Wavetable with downloadable user waveforms — from classic analog shapes to the stereo super-saw engine.
• Second Oscillator: DDS with FM, sync, sub-oscillator, and X-Fade modes — classic tone-shaping for basses, leads, and bell-like timbres.
• Filter: SSI2144 analog four-pole low-pass — the same chip found in Sequential's Prophet X.

Performance — SuperTouch 49 Keybed and Polyphonic Aftertouch

The ST49 keybed is what makes this edition special. Each of the 49 keys reports its own pressure data, so the player can shape individual notes inside a held chord in real time.

• Keybed: 49-key semi-weighted Fatar with weighted action — a tactile, piano-like response under the fingers.
• Aftertouch: Full polyphonic aftertouch on every key — independent per-note pressure routing into the modulation matrix.
• Envelopes: One loopable/invertible HADSR + one classic ADSR — flexible for plucky sounds and evolving pads.
• Dual LFOs and an extensive modulation matrix — every panel control can be modulated simultaneously with unique amounts.

Sequencer, Effects & Connectivity

A multitimbral sequencer, stereo digital effects, and a deep I/O panel make this flagship polysynth ready for studio and stage use.

• Sequencer: 64-step sequencer + multimode arpeggiator with smart hold — for spiraling patterns and live performance.
• Effects: Stereo 24-bit / 192 kHz Roland-style chorus and delay — lush, vintage-flavored processing at the end of the signal chain.
• Patch Memory: 128 rewritable patch storage locations — plenty of room for personal sound design.
• I/O: MIDI In/Out/Thru (5-pin DIN), USB MIDI, stereo 1/4" audio input, Main L/R 1/4" outputs, headphone out, expression pedal input (0–5 V CV-compatible), sustain footswitch input — integrates with hardware and DAW rigs.
• Dimensions: 845 × 360 × 105 mm — compact footprint for a 49-key flagship polysynth.

Who Is the UDO Super 6 ST49 For?

The Super 6 ST49 is the right choice for serious sound designers, performing keyboardists, and studio producers who want polyphonic aftertouch, binaural stereo imaging, and deep hands-on control in a single instrument. Players who lean on MPE controllers, ribbon controllers, or expressive fingerstyle technique will find per-key aftertouch a major creative unlock, while sound designers will appreciate the FPGA super-wavetable, downloadable user waveforms, and the SSI2144 analog filter for sculpting everything from soft analog keys to otherworldly textural pads. The 128 patch slots, 64-step sequencer, and multimode arpeggiator with smart hold make it equally at home in a cinematic scoring setup, an electronic music studio, or a live keyboard rig. Anyone coming from classic Roland polysynths will feel immediately at home with the knob-per-function, no-menu layout.

UDO Audio — Bristol-Based Synthesizer Maker

UDO Audio is a synthesizer company based in Bristol, UK. The Super 6 was UDO's inaugural production synthesizer and the first instrument in the Super Series, designed to harmonize classic analog instrument design with modern FPGA-based synthesis. The binaural signal path — twin voices assigned to each ear — is a signature UDO concept that has since been carried into the larger Super 8 and Super Gemini instruments. The ST49 edition brings the SuperTouch 49 keybed, originally offered as an upgrade kit, into the factory build, making polyphonic aftertouch available out of the box.