 Some include built-in sound card interfaces and others rely on the PC's internal sound setup or make use of a breakout box with a sound card.Some makers of controllers include Akai Professional, Numark Industries, Native Instruments, Novation, Vestax, Livid Instruments, Keith McMillen, Denon, Monome.Some DJ CD Players, such as the Pioneer Corporation CDJ800 and Numark MixDeck can also function as controllers.