Korg opsix SE 61-Key Altered FM Synthesizer Keyboard

The Korg opsix SE is a flagship Altered FM synthesizer that combines an advanced digital sound engine with a premium 61-key Natural Touch keyboard, aftertouch support, expanded polyphony, and a robust all-metal chassis. Designed for professional musicians, producers, composers, and sound designers, it transforms traditional FM synthesis into an intuitive, hands-on creative platform capable of producing everything from vintage digital classics to cutting-edge cinematic textures and modern electronic sounds.

Building upon the acclaimed opsix architecture, the opsix SE significantly expands both performance capabilities and playability. Equipped with up to 80 stereo voices of polyphony, it provides the processing power required for richly layered pads, evolving atmospheres, expressive keyboard performances, and highly detailed sound design projects without compromising sonic clarity.

At the heart of the instrument is Korg's innovative Altered FM architecture, which goes far beyond traditional six-operator FM synthesis. Each operator can perform multiple functions—including frequency modulation, ring modulation, filtering, wave shaping, and additional synthesis modes—allowing users to explore subtractive, additive, analog-style, waveshaping, semi-modular, and classic FM techniques within a single integrated engine.

The premium 61-key Natural Touch keyboard with aftertouch delivers an expressive playing experience comparable to Korg's flagship workstation instruments. Factory programs have been optimized to take advantage of aftertouch performance, enabling musicians to dynamically control timbre, modulation, filters, and expressive parameters directly from their playing technique.

The distinctive Operator Mixer remains one of the defining strengths of the opsix platform. Six illuminated operator controls provide immediate visual feedback, clearly identifying carriers and modulators while allowing instant manipulation of FM structures. This intuitive interface dramatically simplifies programming and encourages experimentation without requiring deep menu navigation.

Housed in a premium metal enclosure with elegantly weighted metallic controls, the opsix SE is engineered for demanding studio sessions and professional touring applications. An included dedicated hard case offers secure transportation and additional storage space for essential accessories such as cables and sustain pedals.

Key Features

• Flagship Altered FM synthesizer with premium performance design
• 61-key Natural Touch keyboard with velocity sensitivity and aftertouch
• Up to 80 stereo voices of polyphony
• Six-operator Altered FM synthesis architecture
• Operator Mixer with illuminated visual feedback
• Supports subtractive, additive, analog-style, waveshaping, semi-modular, and classic FM synthesis techniques
• 40 preset algorithms plus user-definable algorithm creation
• Three independent high-definition effects processors with 30 effect types
• Powerful 16-step sequencer with motion sequencing capabilities
• Extensive modulation matrix with multiple envelopes, LFOs, and virtual patches
• Large OLED display with visual editing feedback
• Premium all-metal chassis with professional-grade construction
• Dedicated hard case included for transport and protection
• Compatible with opsix, opsix native, and compatible Korg sound libraries
• USB MIDI and standard MIDI connectivity for studio integration

Altered FM Synthesis Engine

Rather than limiting itself to conventional frequency modulation, the opsix SE introduces a dramatically expanded synthesis architecture where operators can function in multiple roles throughout the signal chain. This flexible design enables musicians to combine FM techniques with filtering, wave shaping, modulation processing, and analog-inspired sound creation, resulting in an exceptionally broad sonic palette.

From crystal-clear electric pianos and vintage digital bells to evolving cinematic textures, aggressive basses, analog-inspired leads, and experimental soundscapes, the opsix SE provides extraordinary creative flexibility within a unified synthesis environment.

Professional Performance Keyboard

The premium 61-key Natural Touch keyboard provides excellent tactile response and expressive playability for demanding performers. Integrated aftertouch enables direct performance control over numerous synthesis parameters, allowing sounds to evolve naturally through playing dynamics without requiring external controllers.

Most factory programs have been specifically enhanced to take advantage of aftertouch functionality, creating highly responsive performances suitable for both live concerts and studio recording.

Hands-On Sound Design

The illuminated Operator Mixer makes one of the most sophisticated synthesis methods remarkably approachable. Dedicated controls allow musicians to instantly reshape algorithms, adjust operator levels, and experiment with new sonic structures while maintaining constant visual awareness of the synthesis architecture.

Combined with the OLED display and direct-access controls, the interface encourages rapid experimentation and efficient workflow for both beginners and experienced synthesists.

Advanced Sequencing & Modulation

The integrated 16-step sequencer supports recording of multiple notes per step along with detailed editing of velocity, gate time, and playback timing. Motion sequencing enables parameter automation across multiple destinations, creating evolving rhythmic movement and continuously changing textures within every performance.

Multiple envelopes, LFOs, virtual patch routings, and extensive modulation options provide exceptional depth for advanced sound design while remaining easily accessible through the intuitive control surface.

Premium Effects & Studio Integration

Three independent high-definition effects processors offer a wide selection of modulation, delay, reverb, dynamics, and creative processing algorithms. These effects integrate directly into the synthesis engine, providing production-ready sound without requiring external processors.

Full USB MIDI and standard MIDI connectivity allow seamless integration with DAWs, software instruments, hardware synthesizers, and modern studio workflows, while compatibility with the broader opsix ecosystem enables easy sharing of sounds across hardware and software platforms.

Ideal For

• Professional keyboardists and touring musicians
• Electronic music producers and synthesizer enthusiasts
• Film, television, and game music composers
• Advanced sound designers exploring hybrid digital synthesis
• Studio professionals requiring expressive aftertouch performance
• Musicians seeking a flagship FM-based synthesis platform with modern workflow

The Korg opsix SE combines flagship hardware design, expressive performance features, expanded polyphony, and Korg's groundbreaking Altered FM architecture into a powerful synthesizer built for serious music production, advanced sound design, and inspiring live performance.