TRAKTOR PRO is the industry-leading DJ software ? four decks and a stunning range of creative features designed for professional DJs. Industry-leading 4-deck DJ software with unrivaled pro features. Innovative Stem decks for creative mixing with compatible hardware. Powerful looping, over 40 effects, plus 1-knob Macro control.

https://www.native-instruments.com/en/products/traktor/dj-software/traktor-pro-3/