UDO Super Gemini Synthesizer White

UDO Audio Super Gemini White — A Dual-Layer Analog-Hybrid Flagship Synthesizer

The UDO Audio Super Gemini White is a 20-voice polyphonic, bi-timbral analog-hybrid synthesizer built around an unprecedented dual-layer architecture. Each layer is a complete synthesizer in its own right, with its own oscillators, filters, envelopes, LFOs, modulation matrix, sequencer, arpeggiator and effects — so the player effectively commands two instruments from a single 61-key chassis. The white-finished flagship from the Bristol-based maker fuses FPGA digital oscillators with a true analog signal path, delivering the depth of classic polyphonic synths alongside modern flexibility.

What Makes the Super Gemini Stand Out

What separates this instrument from the field is its true Binaural analog signal path. In Binaural mode, the 20 voices are twinned into 10 stereo "super voices," with each ear receiving its own complete synth voice whose parameters can be independently controlled. The result is a sense of three-dimensional spatial positioning that ranges from subtle width to extreme movement — a feature unique to the Super series. Equally distinctive is the dual control panel layout, where every synthesis parameter is duplicated for both layers, eliminating menu-diving and keeping every knob, fader and switch within immediate reach.

Sound Engine and Oscillator Architecture

At the heart of each layer sit two FPGA-based digital oscillators offering sine, triangle, sawtooth, square and noise waveforms. The first oscillator includes a "super mode" with up to 64 user-definable waveforms, while the second provides pulse-width modulation, hardsync, ring modulation and a sine/square sub-oscillator. Cross-modulation covers FM sounds at the oscillator level, and a DDS modulator animates pitch and waveform movement. The signal then flows through an analog 24 dB low-pass filter with switchable two-stage drive, a downstream 6 dB high-pass filter, and an analog VCA.

• Polyphony: 20 voices standard, 10 stereo super voices in Binaural mode
• Oscillators per layer: 2 FPGA-based digital oscillators with 64 user-definable waveforms on OSC1 and PWM on OSC2
• Filter: Analog 24 dB low-pass with drive plus 6 dB high-pass
• VCA: Analog, modulated by envelope, LFO, velocity and aftertouch

Modulation, Sequencing and Effects Per Layer

Each layer carries two ADSR envelopes, two LFOs (LFO1 extends into the audio range and can act as a third oscillator), and an 8×8 modulation matrix with eight storable entries. A 64-step polyphonic sequencer with 16 patterns and a multi-mode arpeggiator with smart hold run independently per layer and sync to MIDI clock. Two 24-bit stereo effects — a Juno-style chorus switchable in three stages and a stereo delay with a dedicated freeze function — round out each layer's signal chain.

• Envelopes: 2 ADSR per layer
• LFOs: 2 per layer with extended audio-range frequency on LFO1
• Modulation matrix: 8×8 routings per layer
• Sequencer: 64 steps, 16 patterns per layer with MIDI sync
• Effects: Two 24-bit stereo effects per layer — chorus and delay with freeze

Keyboard, Controllers and Connectivity

The 61-note semi-weighted Fatar keybed is velocity-sensitive and supports polyphonic aftertouch, allowing individual notes within a held chord to be modulated independently. A custom-designed ribbon controller adds gestural expression for pitch, filter or any user-assigned destination. MPE support is built in. On the rear panel, players find MIDI In/Out/Thru, USB MIDI, four 6.3 mm pedal inputs (volume, expression, sustain and delay freeze), stereo layer outputs on four 6.3 mm jacks and a stereo mix output on two 6.3 mm jacks.

• Keyboard: 61-key semi-weighted Fatar with velocity and polyphonic aftertouch
• Controllers: Custom ribbon controller plus assignable joystick, bender, portamento fader and octave switch
• Memory: 256 patches, 256 performances, 64 user waveforms, 16 sequences
• Dimensions: 1047 × 443 × 130 mm
• Weight: 14.5 kg

Who the Super Gemini White Is For

The Super Gemini White is the right choice for professional synthesists, sound designers and serious studio players who need two independent synthesis engines in a single instrument — without sacrificing the immediacy of hands-on control. Its Binaural mode makes it especially compelling for cinematic scoring, immersive soundscapes and any production where three-dimensional stereo imaging matters. Live performers benefit from the split, dual and single keyboard modes, the per-layer arpeggiator and sequencer, and the tactile ribbon controller. Players who prefer to work by ear rather than menu-diving will appreciate the screen-free design where every function sits directly on the panel.

The UDO Audio Story

UDO Audio is a Bristol-based synthesizer maker building instruments entirely in Europe. The Super Gemini represents a quantum leap in the company's technology, building on the acclaimed sound pioneered by George Hearn with the Super 6. Adopting dual FPGAs, twin effects processors and a true-stereo Binaural signal path, Gemini carries the UDO ethos — "The Power of Play" — into a flagship instrument designed without compromise, with rugged folded aluminium and steel construction intended as an instrument for life.