Arturia KeyStep 37 mk2 is developed by Arturia. It is a 37-key slimkey controller and standalone step sequencer, rebuilt around a high-contrast OLED screen, four mode-aware encoders, and a strip of LED key guides.
It is best for hybrid producers who want one small board to drive modular, hardware, and a DAW. The polyphonic 64-step sequencer, 16-mode arpeggiator, chord and scale modes, and generative Mutate, Spice, and Dice tools live on the unit, and four assignable CV/Gate outputs sit alongside full MIDI DIN and USB-C.
Honest limitations matter. The slimkey bed favors sequencing over expressive piano playing, and it costs a little more than the outgoing mk1. Verify current price, bundled software, and system requirements on the official product page before buying. See the full KeyStep 37 mk2 review for the scored breakdown.