The interactive phrase synth or IPS, its been there since the Atari days, it lets you take midi patterns and loop them while modulating them by all sorts of differnt sources or triggers to create new ideas..

Its actually the sort of thing that could be knocked up in the Logic environment, I just haven't quit got that advanced yet..

Which is one of the reasons I chose Logic, I found I could customise it to my work habits far better than the Steinberg products.

The Logic Environment concept really does let you lift the lid on the inner workings of the audio/midi data and chew it and route it as you want