 Clonewheel organs can be either electronic keyboard-based instruments such as the Korg CX-3 or the Roland VK-7; or keyboardless emulation devices, which include MIDI-compatible tone modules, such as the E-MU B-3 module and software-based "virtual synths" (such as the B4 by Native Instruments [discontinued]).To use keyboardless emulation devices, they need to be connected to a MIDI keyboard controller.The Hammond organ is an electromechanical organ that was designed and built by Laurens Hammond in 1934.