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?

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