Opsix mkII is a digital synth like no other. The natural evolution of the 1st generation Opsix, it expands the number of simultaneous voices to 64. With a truly accessible approach to sound design, it’s perfect for studio or stage. Dive into fresh, innovative sounds, and explore further with powerful controls at your fingertips. From warm pads and deep basses to icy, sparkling chimes, Opsix unlocks new sonic possibilities and brings unique creative potential to your sound palette.

A vast array of sonic possibilities

Opsix starts with legacy synthesis and quickly evolves into something completely different. New sound components, waveforms, filters, shaping possibilities, effects, LFOs, envelopes, modulations, and more, underpin the Altered FM architecture - delivering sounds with more variety than any single synth has ever been able to achieve before.

Incredible real-time control

Whether you’re tweaking a preset or building a patch from the ground up, data entry knobs give you quick access to the parameters you need. A large OLED display provides a clear overview of your workflow which, combined with the mixer, makes creating new sounds quick, easy and fun. Opsix has a full range of analogue-style filters, including the radical Korg MS-20 low-pass/high-pass filter, and the powerful and smooth Korg PolySix low-pass filter. There are also two- or four-pole low-pass, high-pass, band-pass, and band-reject filters with resonance. There’s even a spectrum analyser and oscilloscope built in, giving you visual feedback and insight into the music you’re making. 

Specifications:

Keyboard
37 keys (velocity and release-velocity sensitive)

Sound generating system
Altered FM sound generator

Maximum Polyphony
64 voices (varies depending on the setting)

Structure
6 operators, 1 filter, 3 EGs, 3 LFOs, 3 effects, step sequencer, arpeggiator

Algorithm
40 presets + user algorithm (unique to each program)

Operator
5 modes (FM, Ring Mod., Filter, Filter FM, Wave Folder)

Oscillator waveform
21 waveforms (Sine, Sine 12bit, Sine 8bit, Triangle, Saw, Saw HD, Square, Square HD, Additive Saw3, Additive Sqr3, Additive Tri3, Additive 12345, Additive 1+2, Additive 1+3, Additive 1+4, Additive 1+5, Additive 1+6, Additive 1+7, Additive 1+8, Noise S/H, Noise White)

Filter
11 types (LPF 12, LPF 24, LPF MS-20, LPF POLY6, HPF 12, HPF 24, HPF MS-20, BPF 6, BPF 12, BRF 6, BRF 12)

EG
ADSR

LFO
23 waveforms (Triangle, Saw Down, Saw Up, Square, Sine, Sample&Hold, Guitar, Exp. Triangle, Exp. Saw Down, Exp. Saw Up, Step4 Triangle, Step6 Triangle, Step4 Saw Down, Step6 Saw Down, StepRnd:Time, StepRnd:Lvl&Time, StepRnd:Level, Random:Time, Random:Lvl&Time, Triangle + , Saw Down + , Saw Up + , Square +)

V.Patch
12 routings

Effect
30 types (Chorus, Unison Ensemble, Phaser, Phaser (BPM) , Auto Pan, Auto Pan (BPM), Flanger, Flanger (BPM) , Rotary Speaker, Auto Wah, Exciter, Enhancer, LFO Filter, 3-Band EQ, Distortion, Guitar Amp, Decimator, Grain Shifter, Master Limiter, Compressor, Delay, Delay (BPM) , Autopan Dly, Autopan Dly (BPM), Tape Echo, Tape Echo (BPM) , Early Reflection, Reverb, Shimmer Reverb, Spring Reverb)

Sequencer
Step Sequencer (up to 16 steps, up to 6 notes per step)

Motion Sequencer (up to 6 lanes)

Arpeggiator
7 patterns (MANUAL, UP, DOWN, ALT1, ALT2, RANDOM, TRIGGER)

Number of programs
500 (250 preset programs and 250 user programs as the factory-set default)
FAVORITE: 64 (16 Slots × 4 Banks)

Controllers
MODULATION wheel, PITCH wheel, RATIO OP 1–6 knobs, LEVEL OP 1–6 sliders, DATA ENTRY A–F knobs

Inputs/outputs
Headphone (6.3 mm stereo phone jack)
OUTPUT L/MONO and R (impedance-balanced 6.3 mm TRS phone jacks)
DAMPER (6.3 mm phone jack, half-damper not supported)
MIDI IN and OUT connectors
USB B port

Power supply
AC adapter (DC12V)

Power consumption
5 W

Dimensions (W × D × H)
565 × 338 × 90 mm

Weight
2.9 kg

Included items
AC adapter