Rast Sound released Designer Drums, a dual layer intelligent rhythm engine for Kontakt that comes with smart dynamics technology.

We always wanted a more versatile and realistic sounding drum tool. One that could be used for any style, one that would result in much better dynamic behaviour when compared to typical velocity-volume systems and one with which creating unique timbres by combining (and cross mixing) different styles of kits is a breeze.

More info here: Rast Sound | Designer Drums