The KeyStep 37 takes all the best features of the KeyStep and builds on it further. It sits in the middle of the Arturia Keystep Range and is one of the most feature-packed MIDI controllers available. If youre looking a MIDI Controller that is easy to use, robust and seamlessly integrates with your studio setup via USB or sync with your external hardware via MIDI/CV, the KeyStep Range is for you. The Arturia KeyStep Range all come with a free download of Ableton Live Lite, an accessible music-making suite for your Mac or PC. Just register your KeyStep to receive your free download and get creative right out the box and let the music flow.All Arturia KeyStep controllers have velocity-sensitive Slimkeys (32 keys on KeyStep and 37 on KeyStep 37/KeyStep Pro) with AfterTouch, a built-in Polyphonic Sequencer (8 note polyphony on the KeyStep/KeyStep 37 and 16 note on the KeyStep Pro) with 8 pattern slots (16 on KeyStep Pro) per track (1 track on KeyStep/KeyStep 37 and 4 on KeyStep Pro). Also