The 2015 NAMM video explains it very well. Just once, it would be nice to see an alternative controller sell in figures comparable to the boring “workstation” synthesizers.

http://www.sweetwater.com/store/detail/LinnStrument
http://www.musiciansfriend.com/keyboards-midi/roger-linn-design-linnstrument-midi-controller
http://www.samash.com/linnstrument-midi-controller-rlsnlxxxx-p