It's the Morrison Digital Trumpet, invented by an Australian trumpet player and trumpet-playing robotics boffin. Apart from perfectly matching a Moog Voyager, the best thing about it is that it's completely flat, so anyone playing it looks like they've walked into a cartoon. I strongly advise you to watch this [500k QT] of the inventor using it to trigger Reactor on a laptop (it sounds just like a squeaky trumpet to me, but what do I know?), and this [6.5mb QT] clip of a chap playing a load of different sounds. It's $2,495 from Patchman Music, or this one on eBay for $2,000: "I purchased it about two months... it wasn't used much."