- Arturia KeyStep Pro Chroma; USB/MIDI Controller Keyboard with Sequencer; 37 note slim keys, velocity and aftertouch sensitive; LED above each key for efficient visual feedback; 4-track Step Sequencer with 16 step buttons, up to 64 steps per Sequence and up to 16 notes of polyphony per Step; 24-Part Polyrhythm Drum Sequencer; Performance-oriented Sequencer; Melodic Sequencer with Real-Time recording, Step recording, Step editing (Pitch, velocity, gate length, time shift and probability for each note); Arpeggiator; Chord mode; Controller mode; OLED Display; Connectors: 4x CV/Gate/Mod outputs + 8 drum gate outputs 3.5mm Minijack, 1x MIDI-In, 2x MIDI-Out, USB, Clock synchronization, Metronome with included speaker and line output, Sustain pedal input 6.3mm Jack; incl. external Power Supply and USB Cable; Dimensions (W x H x D): 589 x 38 x 208mm; Weight: 2.7kg