Quantize: DJs will never miss a beat again as the quantize function automatically synchronises the beat of rekordbox-ready tracks and effects.

ENGADGET: Pioneer's new WiFi-enabled XDJ-AERO controller says goodbye wires, hello dancefloor (video)

This is where we break out onto the outer black buttons, which (among other things) contain controls for quantize, delete and -- thankfully for us -- undo.

ENGADGET: Ableton Push review: a dedicated controller for the Live faithful