Numark’s 4TRAK DJ mixer, interface and control surface sets out to be the ultimate control surface and interface for Native Instruments’ Traktor 2 DJ software. The 4TRAK is built around a four-channel analogue mixer, which can be used independently from a computer. Each channel has RCA inputs and there are four additional line-level inputs, with two switchable to phono and two switchable to mic-level. Connect turntables, CD-players, MP3 players, microphones, even synthesizers to the mixer to add them to your mix. Each channel can therefore switch from an analogue source to the signal coming from Traktor.