Korg Opsix mkII (B-stock)

The Korg Opsix MKII Digital Altered FM Synthesizer is a 37-key velocity and release-velocity sensitive instrument with 64-voice polyphony, 40 algorithms, six-operator structure, 30 studio-grade effects, advanced modulation routing, step and motion sequencers, and an OLED display for instant sound-shaping feedback.

Altered FM Synthesis with Six-in-One Power

At the core of the Opsix MKII is Korg’s altered FM engine, expanding classic FM synthesis into a versatile platform with subtractive, semi-modular, analogue modelling, waveshaping, additive and traditional FM modes. With six operators controlled via dedicated faders and knobs, sound creation becomes intuitive and hands-on. Users can choose from 40 preset algorithms or design unique structures, unlocking everything from crystalline bells to complex evolving textures.

Enhanced Polyphony and Workflow

The Opsix MKII offers up to 64 simultaneous voices, providing richer layers and more intricate harmonies than its predecessor. A large OLED display ensures clear visual feedback during programming, while dedicated data entry knobs streamline parameter editing. The randomisation function instantly generates fresh sonic material, inspiring experimentation.

Analogue-Style Filters and Visual Tools

In addition to FM-based synthesis, the Opsix MKII includes analogue-style filter models such as the MS-20’s resonant low-pass/high-pass circuit and the PolySix’s warm low-pass filter. Eleven filter types in total, with two- and four-pole variations, provide deep tonal shaping. Built-in oscilloscope and spectrum analyser tools give real-time visualisation of sound design choices.

Sequencing and Motion Control

The integrated step sequencer supports up to 16 steps with six-note polyphony per step, including velocity, gate time and playback timing per note. A motion sequencer records up to six lanes of parameter automation, enabling evolving patterns and rhythmic shifts. An arpeggiator with seven modes adds further performance versatility.

Studio-Grade Effects

Thirty onboard effects, including reverb, chorus, phaser, compressor and delay, can be layered to craft detailed soundscapes. These high-definition processors add polish and depth, ensuring the Opsix MKII works as effectively in a production studio as it does on stage.

Comprehensive Modulation System

Three envelopes, three LFOs, 21 oscillator waveforms, 23 LFO waveforms and 12 virtual patch routings deliver vast modulation possibilities. This flexibility allows subtle modulation for evolving pads or complex routing for experimental textures.

Why Choose the Korg Opsix MKII

• Expanded polyphony with 64 simultaneous voices for complex arrangements

• Altered FM synthesis combining six different synthesis methods in one instrument

• Operator mixer with six faders and knobs for real-time control

• Large OLED display with oscilloscope and spectrum analyser for visual feedback

• Studio-quality effects with 30 processors for professional sound design

• Advanced step and motion sequencers for evolving, dynamic patterns

• Analogue-style filter models including MS-20 and PolySix emulations

• Extensive modulation with envelopes, LFOs and 12 virtual patches

• Compact 2.9 kg design ideal for stage and studio use