The KeyStep has earned its place as one of the most versatile compact controllers on the market. Thirty-two slim velocity-sensitive keys with aftertouch, a 64-step polyphonic sequencer with eight-note polyphony per step, and a full-featured arpeggiator — all in a metal-base chassis small enough to fit in a backpack. The connectivity is what sets it apart from similarly priced options: USB MIDI, standard MIDI in and out, CV/gate outputs with 1V/oct and Hz/V modes, a separate assignable mod CV output, and sync I/O supporting Korg Volca, DIN sync, and more. Capacitive-touch pitch bend and mod strips, chord mode, sustain pedal input, and tap tempo round out a thoughtfully designed controller that bridges analog and digital setups without compromise.
This unit is in very good condition and fully functional throughout. There is one small mark on the surface; otherwise cosmetic wear is consistent with regular use. Photos show the condition accurately.
- Make: Arturia
- Model: KeyStep
- Year: 2016
- Type: 32-key MIDI controller and polyphonic step sequencer
- Keys: 32 Slimkey, velocity sensitive, aftertouch
- Sequencer: 64-step, 8-note polyphony per step, 8 sequences
- Arpeggiator: 8 modes including up, down, inclusive, exclusive, random, walk, pattern, order
- Controls: capacitive-touch pitch bend and mod strips, octave buttons, hold button, chord mode
- MIDI: USB MIDI, MIDI in/out (5-pin DIN)
- CV outputs: pitch CV (1V/oct or Hz/V), gate (5V or 12V), mod CV (assignable)
- Sync: sync in/out, supports 1PPQ, 2PPQ (Volca), 24PPQ, 48PPQ DIN sync
- Sustain pedal input: yes
- Power: USB bus-powered or DC adapter (not included)
- Dimensions: 19" x 5.75"
- Modifications: none
- Includes: original box
Ships carefully packed and insured for full value.
International buyers are welcome — please contact us for a shipping quote before purchasing.
About Mill River Music
Mill River Music is an independent, human-powered music shop located in downtown Northampton, MA, run by a team of players, enthusiasts, and certified repair technicians. Every piece of used gear we sell is personally inspected, tested, and set up before it ships — we don't list it until we'd be happy to play it ourselves.
As Martin and Taylor certified techs, we hold our guitar work to a high standard, and we're committed to full transparency about the condition of everything we sell. No surprises.
When you buy from Mill River, you're supporting an independent local business that genuinely cares — about gear, about players, and about doing things right. We're here every step of the way. Reach out anytime.
