Korg opsix mk II - Return (Condition: Very Good)

The Operator Mixer Brings Clarity

The heart of every sound on the opsix mkII is the unique operator mixer—a clear, approachable combination of six faders and knobs that invites sonic exploration. Each of the six parts is illuminated and gives visual feedback through its color: audible signals glow red, while modulators are highlighted in blue. Changing these controls instantly reshapes the current sound, injecting fresh energy into your musical ideas. This straightforward, easy-to-follow workflow is what makes the opsix mkII special—besides its extraordinary sounds, of course.

Everything Within Easy Reach

Whether you want to adapt a finished preset to your own needs or build completely original sounds from scratch—the six flexible data entry knobs give you lightning-fast access to all key parameters and work seamlessly with the large OLED display to provide a perfect overview at all times and enable an unrestricted creative workflow. In combination with the operator mixer, creating new sounds becomes child’s play—and a whole lot of fun!

Choose from a wide range of filters modeled on classic designs, such as the radical KORG MS-20 low- and high-pass filters or the powerful yet silky Polysix low-pass filter, which lends your sound a delightful vintage character. There are also resonant two- and four-pole low-pass, high-pass, band-pass and even band-reject filters to choose from. For instant visual feedback during sound design, a built-in spectrum analyzer and a classic oscilloscope are available in the display.

Everything's Different Thanks to Altered FM

What began as an idea to revive a classic synthesis method quickly evolved in a completely different direction. The basis of the opsix mkII sound engine is FM, but the similarities to that synthesis form practically end there. The Altered FM architecture delivers a huge palette of sounds—more versatile than almost any single synthesis method before it. With the additional waveforms, filters, waveshapers, effects, LFOs, envelopes, modulations and more, you can realize an almost endless variety of new and never-before-heard sounds.

Powerful Effects Processors

The opsix mkII offers three effect blocks that can be used simultaneously, each loaded with 30 high-resolution effects. These make it easy to further refine your sounds and take them to a new level. The rich effects selection mixes essential staples like Chorus, Phaser, Delay and Compressor with more specialized studio-quality tools such as shimmer reverbs that open entirely new dimensions for your sounds.

Polyphonic Motion Sequencing

The opsix mkII is equipped with an extremely versatile step sequencer whose flexibility and deep features can put many grooveboxes to shame. A single press of the PLAY button recalls complex sequences with constantly evolving sounds. Every sound program already includes its own sequence, but of course you are free to program your own sequences.

Up to six notes can be programmed per step, and for each note you can edit velocity value, gate time and playback timing. This produces long phrases or subtle timing shifts—useful for guitar-style picking patterns or drum rolls—that a conventional 16-step sequencer simply can't deliver. The opsix mkII's motion sequencer also allows recording automations for up to six different parameters, animating subtle tonal nuances or even creating complex rhythm patterns whose sound changes drastically per step.

Flexible Modulation Matrix

The modulation possibilities on the opsix mkII are truly extraordinary. With six different operator modes and 40 preset algorithms plus the ability to create entirely custom algorithms, the opsix mkII provides an almost inexhaustible arsenal of sonic tools. The synthesis is further fueled by processors at the end of the signal chain. The MOD section operates independently from the six operators and delivers three envelopes, three LFOs and twelve virtual patches for immense routing options. With this setup you can effortlessly create sprawling modulations for wavering soundscapes or sounds with pronounced rhythmic character.

Chance Comes Into Play

For special inspiration, the clever randomize function can help. By simply pressing the button marked with the dice symbol, the synth's sound parameters are literally "shuffled" at random, producing entirely new, unique sounds. This randomize function can be applied to all parameters at once or only to the operators, the algorithm, or the stored sequence. In this way, "happy little accidents" can yield fantastic new sounds—or at the very least useful starting points for further sound design.

Free Librarian Software

The opsix librarian software lets you manage sounds on a USB-connected opsix mkII from your computer and transfer individual sound data between the opsix mkII and the connected computer.