APC40 mkII is a hardware controller for the music production software Ableton Live. Designed to offer seamless integration with the software, the APC40 mkII provides a physical interface to launch clips, control device parameters, mix audio and much more.

This controller has been improved over its predecessor and features a smarter design, greater functionality, and smoother integration with Ableton Live. It also includes a series of music production add-ons, such as Ableton Live Lite, virtual synthesizers, and sample libraries.