Instead of hitting one key and getting one note, Arnalds can hit one key and get a multitude of unanticipated notes. That does pose one problem, though: There's no way to replicate what the piano ...

Enter Lumi Keys. Lumi Keys from Roli is a keyboard contained in a foot-long block, with translucent keys that light up in various colors depending on which note is played.

There's not much difference in price, but then, there's not much difference between either model, really. Although 76 semi-weighted keys come out nearly 7kgs lighter than the flagship 88, ...