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KeyStep 37 Portable Keyboard Controller + Step Sequencer

SKU eq-1697

37 slimkey controller w/ 64 note sequencer to control your vintage gear, modular + software synths at once
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Lab Overview

Open Box / B-Stock Notes

  • item cosmetic note: n/a
  • item function note: ✔️ tested
  • item exterior packaging: original, may have cosmetic wear
  • note: all open box / b-stock items are final sale


  • 37 key USB MIDI controller w/ polyphonic step sequencer for analog + digital devices
  • Arturia’s custom slimkey keybed offers full-sized key feel across 37 narrow keys with velocity, aftertouch + color-coded LED feedback on triggered notes
  • MIDI control via USB, standard MIDI, CV/Gate/Mod outputs for vintage analog gear
  • 64 step sequencer with 8-note polyphony per step
  • 8-mode arpeggiator w/ 4-octave range
  • capacitive pitch bend + mod wheel touch strips
  • chord play mode (play a chord and reproduce it across the keybed)
  • sustain pedal input

“KeyStep 37 combines a flexible 37-note keyboard with intuitive sequencing, instant chord generation and creative real-time MIDI controls that let you discover and interact with music like never before. An accessible interface, a compact design and comprehensive connectivity make it the perfect centerpiece for your rig. 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.” - Arturia


  • 37-key slimkey keybed with velocity and aftertouch
  • arpeggiator modes: Up, Down, Inclusive, Exclusive, Random, Walk, Pattern + Order
  • sequencer mode: 8 polyphonic step-sequences with Rest, Tie, and Legato note entry (Each sequence can have 64 steps with 8 notes of polyphony)
  • rate control and tap tempo: REC, PLAY, and STOP buttons for performance control over the sequencer and arpeggiator
  • 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
  • power: 12V DC
  • dimensions: 21.7" x 5.78" x 1.38" / 550 x 147 x 35mm
  • weight: 3.5 lbs. / 1.6 Kg


  • USB cable
  • Anti-ground loop adapter
UPC: 3760033531540

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