Arturia KeyStep 37 mk2 – 37-Key MIDI Controller & Polyphonic Sequencer

The Arturia KeyStep 37 mk2 is a compact yet powerful MIDI controller and polyphonic sequencer designed for modern hybrid music setups. Combining expressive playability with advanced generative sequencing and extensive connectivity, it gives musicians complete control over software instruments, hardware synths, and modular systems—all from a streamlined desktop controller.

At its core is a 37-note Slimkey keyboard with velocity sensitivity and aftertouch, offering expressive response in a small footprint. Pitch bend and modulation touch strips provide intuitive real-time control, while Chord and Scale modes make it easy to explore new harmonic ideas without breaking creative flow.

KeyStep 37 mk2 goes beyond traditional controllers with its built-in polyphonic step sequencer and 16-mode arpeggiator. Create evolving patterns using powerful creative tools like Mutate, Spice & Dice, pattern chaining, and real-time automation recording. Whether sketching ideas in the studio or performing live, it’s designed to keep inspiration moving forward.

Connectivity is where KeyStep 37 mk2 truly shines. Alongside USB-C MIDI and full-size MIDI DIN I/O, it features Sync I/O, pedal input, and four configurable CV outputs—Pitch, Gate, Mod 1, and Mod 2—making it equally at home controlling DAWs, analog synths, and Eurorack systems. Four assignable encoders and a clear OLED display ensure hands-on control with minimal menu diving.

Compact, versatile, and built for creative exploration, the Arturia KeyStep 37 mk2 is an ideal centerpiece for producers, performers, and synth enthusiasts who want deep control without complexity.