Synths are nothing new, of course -- so what makes Roli's digital piano so novel? The instrument has a patent-pending rubberized surface that lets you bend and twist the keys as you play, freeing you from fiddling around with knobs, so you can directly, physically affect the way it sounds. Think of it as the difference between bending a string on a guitar, rather than stepping on the wah-wah pedal. It's the sort of thing you really have to see in action to appreciate -- thankfully, we've got the instrument's creator Roland Lamb giving us a demo after the break.Gallery: