Arturia Keystep 37 MKII MIDI Controller

The Arturia KeyStep 37 mk2 is a compact, 37 note MIDI keyboard controller and sequencer designed to sit at the heart of a modern hybrid setup. With its expressive Slimkey keybed, powerful generative sequencing tools and deep hardware and software connectivity, it gives you hands on control of modular rigs, desktop synths and DAWs alike, helping ideas flow quickly from your fingertips into finished tracks.

Whether you are sketching melodies on the sofa, clocking a Eurorack system in the studio or driving soft synths on stage, KeyStep 37 mk2 keeps everything locked together. Its polyphonic step sequencer, 16 mode arpeggiator and creative Mutate tools invite experimentation, while four assignable encoders and clear visual feedback make it easy to stay in the moment and perform.

Expressive Slimkey Keyboard

At the core of KeyStep 37 mk2 is Arturia’s 37 note Slimkey keybed, combining a compact footprint with a responsive, musical feel. The keys are velocity sensitive with aftertouch, so you can add dynamics, swells and vibrato without reaching for a mouse or menu. Two capacitive touch strips for pitch bend and modulation provide intuitive real time shaping, while dedicated chord and scale modes help you explore harmonies, stay in key and unlock progressions you might not normally play.

Generative Sequencing and Arpeggiation

KeyStep 37 mk2 is as much an ideas machine as it is a controller. Its polyphonic step sequencer offers up to 64 steps with 8 voice polyphony, letting you build rich patterns that go far beyond simple monophonic lines. The 16 mode arpeggiator ranges from classic up and down patterns to more adventurous generative styles, ideal for evolving textures and rhythmic hooks. You can quickly turn an arpeggio into a sequence, chain patterns together and keep performances moving without breaking your creative flow.

Mutate, Spice and Dice

Arturia’s Mutate, Spice and Dice tools give you instant variation at the touch of a button. Start with a simple riff, then use Mutate to generate new melodic twists while retaining the character of your original idea. Spice and Dice introduce controlled randomness and rhythmic changes, so you can explore fresh variations live without losing musicality. You can also adjust octaves, note lengths, rests and overdub extra notes, as well as record bend and modulation automation, keeping patterns evolving and performances feeling alive.

Deep Connectivity for Hybrid Rigs

KeyStep 37 mk2 is built to integrate with almost any setup. Alongside USB C MIDI for your computer or tablet, you get full size MIDI DIN in and out, 3.5 mm sync in and out and a sustain or expression pedal input. Four CV outputs – Pitch, Gate, Mod 1 and the new Mod 2 – can be assigned to velocity, aftertouch, mod wheel and more, giving you expressive control over modular and analogue hardware. With class compliant USB operation, low power consumption and an included software bundle featuring Analog Lab Intro and Ableton Live Lite, it is ready to drop straight into your studio or live rig.

• 37 Note Slimkey Keyboard with Aftertouch - A compact yet expressive keybed with velocity and aftertouch lets you play nuanced parts, control filters, vibrato and more directly from the keys, making it ideal for both studio composition and live performance.
• Polyphonic Sequencer and 16 Mode Arpeggiator - Create up to 64 step, 8 voice polyphonic sequences and explore a wide range of arpeggiator patterns, from classic to generative, so you can build complex riffs, pads and rhythmic lines without touching your DAW.
• Mutate, Spice and Dice Creative Tools - Instantly generate variations on your patterns, add controlled randomness and reshape rhythms on the fly, helping you break out of creative ruts and keep ideas evolving during jams or live sets.
• Extensive MIDI and CV Connectivity - USB C MIDI, full size MIDI DIN, sync I/O, pedal input and four configurable CV outputs mean KeyStep 37 mk2 can control modular systems, desktop synths and software instruments at the same time, acting as a central hub for hybrid production setups.

Keyboard

• Keys: 37 note Slimkey keyboard
• Key Size: Slim, compact profile
• Velocity: Velocity sensitive
• Aftertouch: Channel aftertouch
• Pitch Control: Capacitive touch strip
• Modulation Control: Capacitive touch strip

Sequencer and Arpeggiator

• Step Sequencer: Polyphonic step sequencer
• Maximum Steps: Up to 64 steps per sequence
• Polyphony: Up to 8 voice polyphony per step
• Arpeggiator: 16 mode arpeggiator with generative pattern styles
• Pattern Chaining: Yes
• Live Tools: Mutate, Spice and Dice for real time variation
• Chord Mode: Yes
• Scale Mode: Yes
• Automation: Record bend and modulation data into sequences

Controls and Display

• Encoders: 4 dedicated encoders plus Control button
• Mode Aware Editing: Hands on editing for Sequencer, Arpeggiator, Chord and Mutate parameters
• MIDI CC Control: MIDI CC button with 4 banks
• Assignable CCs: 16 assignable MIDI CCs available across all modes
• Display: OLED display with clickable encoder
• Visual Feedback: RGB LED feedback

Connectivity

• USB: USB C MIDI, class compliant, bus powered
• MIDI: Full size MIDI DIN In and Out
• Sync: 3.5 mm Sync In and Sync Out
• CV Outputs: 4 controllable CV and Gate outputs (Pitch, Gate, Mod 1, Mod 2)
• CV Assignments: Assignable to velocity, aftertouch, mod wheel and more
• Pedal Input: Sustain or expression pedal input (TRS)
• Power: Low power operation via USB
• Security: Kensington lock slot

Software Bundle

• Included Software: Analog Lab Intro (500 plus sounds)
• DAW Software: Ableton Live Lite

Box Contents

• Included Hardware: KeyStep 37 mk2 unit
• Cable: USB A to USB C cable