The controller that’s built to inspire

Overcome creative hurdles. Smash artistic barriers. Discover new musical horizons. A powerful tool that seamlessly controls your hardware and software instruments simultaneously. An exploratory device that encourages spontaneous creativity with its musical features. Surrender to the musical journey - where will KeyStep 37 take you?

37-note Slimkey keyboard

With velocity, aftertouch and real-time RGB LED indicators for a comfortable, responsive performance.

Creative sequencer and arpeggiator

Sequence up to 64-steps with 8-note polyphony and 8 pattern slots, or explore 8 modes of arpeggiation.

Supercharged Chord mode

Generate instant chord sequences that respond to your velocity, with 12 chord types, and an articulate instrument-like strum control.

Versatile connectivity

Connect to your computer, your desktop MIDI synths, or your CV & modular gear for simultaneous control over hardware and software.

Scale mode

Quantize the keyboard and never play a wrong note. Choose from 5 scales, including a user-defined scale, to set your own musical terms.

Assignable MIDI CC controls

Interact with your hardware and software with 16 assignable MIDI CC parameters across 4 switchable banks.

Connecting your musical ideas

KeyStep 37 goes beyond an easy-to-use sequencer and arpeggiator.

It's responsive, dynamic, and expanded in every direction to encourage musical exploration. Record, perform, and experiment with a compact, accessible keybed that’s familiar and enjoyable in equal measure. Unite your hardware and software with deep connectivity, offering seamless control over your setup.

Push the boundaries of your expression with real-time MIDI CC control and LED feedback. Unlock undiscovered creative potential with the inspiring and unique Chord and Scale functions.

KeyStep 37 isn’t just a keyboard controller - it’s your new source of inspiration.

More is more

The same velocity-sensitive 37-note keybed as the KeyStep Pro, complete with aftertouch and RGB LED feedback. A lightweight and compact keyboard that offers full and familiar creative flexibility, whatever your style or ability.

At the center of KeyStep 37’s interface we’ve added 4 new control knobs with a screen, giving you instant access to inspiring new expressive tools and MIDI tweaking - total control.

More is more

The same velocity-sensitive 37-note keybed as the KeyStep Pro, complete with aftertouch and RGB LED feedback. A lightweight and compact keyboard that offers full and familiar creative flexibility, whatever your style or ability.

At the center of KeyStep 37’s interface we’ve added 4 new control knobs with a screen, giving you instant access to inspiring new expressive tools and MIDI tweaking - total control.

Music made interactive

KeyStep 37’s unique & enhanced Chord mode takes your single note melodies and unfinished ideas and transforms them into musical stepping stones. Choose from multiple voicings, instrument-like strum effects, and velocity settings and make your music really sing.

Map out KeyStep 37’s 3-octave keyboard range with a scale of your choice using Scale mode. Any key you play will automatically quantize to the nearest note in the chosen scale - never play a wrong note again.

Tap into the inner workings of your MIDI hardware and software with assignable 16 MIDI CC parameters across 4 switchable banks. Use the 4 new controls to tweak settings on the fly for dynamic performances.

James Brown

Artists Corner

I've literally been using the new KeyStep 37 non-stop since I got my hands on the wonderful shiny white beast. It does absolutely everything I'd want from a MIDI controller/arpeggiator and a hell of a lot more. This has easily flown straight to the top of my must-have tool list right now.
James Brown
( Pulled Apart By Horses )
Anthony Tombling

Artists Corner

Love the sequencer, arp and the chord generator! Wow, this little thing has a ton of capabilities!
Anthony Tombling
( CUTS )

The core of your setup

KeyStep 37 is designed to be put in control. An accessible interface, a compact design and comprehensive connectivity make it the perfect centerpiece for your rig - whatever your needs.

Hook up your synth hardware with MIDI in/out. Control your favorite VST instruments with MIDI over USB. Use CV pitch, gate and mod connections for modular integration. Analog sync in/out keeps everything in time without hassle. The best bit? Use it all at the same time.

Ableton Live Lite included
An introduction to one of the most intuitive, popular production platforms around

Included is a free copy of Ableton Live Lite, an accessible music-making suite for your Mac or PC. Register KeyStep 37 for your free download and get creative right out the box - let the music flow freely.

Ableton Live Lite included
An introduction to one of the most intuitive, popular production platforms around

Included is a free copy of Ableton Live Lite, an accessible music-making suite for your Mac or PC. Register KeyStep 37 for your free download and get creative right out the box - let the music flow freely.

Sound Corner

Six Strums (Victor Morello)

A melodic breakbeat track making extensive use of the chord, and arpeggiator features to control sounds from Pigments and OBXa-V.

Drexciyan Windmills (Leo Battle)

A techno track exploring the combinations of the arpeggiator, the sequencer, and the strum/type settings of the chord, with sounds coming from the ARP 2600 V3.

Less Than One (Jean-Baptiste Arthus)

Space ambient track layering chords, an odd-length sequence, and a strummed lead.

KeyStep range comparison

Whether you’re looking for ease of use, creativity or absolute control, the KeyStep range delivers. Explore the features of the different models and find the right one for your needs.

KEYSTEP KEYSTEP 37 KEYSTEP Pro
Number of keys 32 37 37
Keybed Slimkeys Slimkeys Slimkeys
Velocity Yes Yes Yes
AfterTouch Yes Yes Yes
Keybed LED feedback No Yes Yes
Built-in sequencer tracks 1 1 4
Sequencer Polyphony 8 8 16
Sequencer pattern slots per tracks 8 8 16
Sequencer playing modes 1 1 3
Drum sequencer No No Yes
Pattern chaining No No Yes
Built-in arpeggiator Yes Yes Yes
Arpeggiator modes 8 8 7
Arpeggiator Octave range 5 +/- 3 octaves 5 +/- 3 octaves 5
Scale quantize No Yes Yes
Chord Mode Yes Yes Yes
Chord Strum/Velocity feature No Yes No
MIDI CC control No Yes Yes
MIDI CC automation No No 4
Display LED OLED
Metronome No No Yes
Project save No No Yes
MIDI I/O 1 In
1 Out
1 In
1 Out
1 In
2 Outs
MIDI over USB Yes Yes Yes
CV outputs 3 3 12
Drum gate outputs 8
Clock Sync I/O Yes Yes Yes
Sustain pedal input Yes Yes Yes

Box contents

  • KeyStep 37 unit
  • Anti-ground loop adapter
  • USB cable

Size & weight

  • Instrument size : 21.7 x 5.78 x 1.38 inches (550 x 147 x 35mm)
  • Instrument weight : 3.5 lbs. (1.6 Kg)

Main Features

  • Slimkey keybed with velocity and aftertouch
  • RGB LEDs on each key for instant feedback on your sequence, arp, scale
  • Arpeggiator mode: Up, Down, Inclusive, Exclusive, Random, Walk, Pattern and Order
  • Sequencer mode: 8 polyphonic step-sequences with Rest, Tie, and Legato note entry
  • Rate control and tap tempo: REC, PLAY, and STOP buttons for performance control over the sequencer and arpeggiator
  • Sustain HOLD button
  • Sustain pedal jack
  • Advanced Chord mode with pre-defined or user Chords and strumming capability
  • SHIFT button selection : MIDI Channel selection, Gate length, Swing, Sequence Edit, Scale quantization, CC Bank selection
  • DC power jack for standalone operation
  • USB MIDI and MIDI in/out ports
  • Sync i/o ports
  • Sync source switch : Internal, USB, MIDI, Clock
  • CV/Gate outputs with configurable pitch, gate and Modulation formats.
  • Capacitive pitch bend and mod wheel strips
  • Each sequence can have 64 steps with 8 notes of polyphony