http://www.youtube.com/watch?v=ScjJiGYawuM
German developer Native Instruments has long been regarded as the maker of some of the finest music and DJing software on the market and today they released Traktor DJ, a pro music mixing $19.99 iPad app that complements the desktop Traktor Pro software with bi-directional content synchronization and a host of other feature.
Unlike virtually all the other DJ apps that tap virtual turntables, Traktor DJ sports touchable waveforms and has two virtual decks, each with dedicated three-band equalizer and filter sections, including eight Traktor effects.
The app relies heavily on multitouch gestures: you can grab audio waveforms with two fingers to set a loop, perform scratches, mark cue points for live re-editing, and scrub, browse or navigate through tracks. Go past the break for additional tidbits and a hands-on video...