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Arturia KeyStep mk2 is a 32-key controller and polyphonic step sequencer with an OLED display, USB-C, MIDI DIN in/out, 3.5mm sync I/O and four assignable CV outputs (Pitch, Gate, Mod 1, Mod 2) for modular gear.
It fits producers and hybrid performers who want a backpack-size keyboard that speaks USB, MIDI and CV fluently.
At a Glance
| Keybed | 32 velocity-sensitive slim keys with aftertouch |
| Sequencer | 64-step polyphonic sequencer, up to 8-note polyphony, pattern chaining and unquantized recording |
| Arpeggiator | 16 arp types plus generative tools like Mutate |
| Display | OLED screen with clickable encoder, RGB feedback |
| Creative modes | Chord mode and Scale mode |
I/O and Connectivity
| CV outputs | 4 x 3.5mm: Pitch, Gate, Mod 1 and Mod 2, assignable to velocity, aftertouch, mod strip and more |
| MIDI | Full-size 5-pin MIDI DIN input and output |
| Sync | 3.5mm clock in and out with start/stop |
| Pedal | TRS input for sustain footswitch or expression pedal |
| USB-C | Class-compliant USB MIDI, bus powered, with a dedicated power switch |
Key Features
- Four CV outputs: the added Mod 2 output gives modular users two assignable modulation lanes
- Generative sequencing: Mutate and phrase tools evolve patterns live
- USB-C and power switch: modern connectivity upgrades over the first generation
- MIDI In to CV: play your modular from an external MIDI keyboard through KeyStep
Frequently Asked Questions
What is new versus the original KeyStep?
USB-C, a power switch, an OLED display with encoder, a second assignable CV Mod output and an upgraded sequencer with mutation tools.
How many CV outputs does it have?
Four: Pitch, Gate, Mod 1 and Mod 2. The Mod outputs are assignable to velocity, aftertouch, mod strip, random or pulse.
Does it have full-size MIDI ports?
Yes. 5-pin MIDI DIN in and out, plus 3.5mm sync I/O for pre-MIDI gear.
Can I use an expression pedal?
Yes. The TRS pedal input accepts a sustain footswitch or expression pedal.
Need help choosing?
Victory Musical Instruments can help compare models and configurations for your setup.