This unit supports the scratch function using Control CDs or Control Vinyls for TRAKTOR SCRATCH PRO 2/DUO 2 software versions 2.0.0 and later. Those using TRAKTOR SCRATCH PRO/DUO software versions 1.2.7 or earlier can use the scratch function with Control CDs or Control Vinyls by upgrading to TRAKTOR SCRATCH PRO 2/DUO 2 (for a fee). For details, see the Native Instruments website.