Studiologic Numa X Piano GT Digital Piano with Hammer-Action KeysThe Studiologic Numa X Piano GT Digital Piano with Hammer Action Keys is designed and organized in an amazingly intuitive and effective way to offer the best feeling in performance, under every aspect, and in every context. With an incredibly powerful brand new sound engine, four parts easily assignable to internal sounds or external midi, a four track built in digital mixer, a USB audio interface, and the best touch ever, its the ultimate keyboard