I heard the same video and yes Peter Baartmans really knows how to make a good Sax improvisation on the Genos. Having said that the real goal at least in my opinion is that Yamaha and other keyboard manufacturers would create a Sax sound that more closely resembles a real Saxophone. They are getting better at it but they still have a ways to go if you ask me. To put it in perspective here is an mp3 file of a
real Saxophone being played that shows you what keyboards are still missing in the way of authenticity. Enjoy..
All the best,
Mike
PS: Don't get me wrong. If the keyboard Sax is played skillfully like Peter Baartmans does then it makes the sound of the keyboard Sax itself of less importance. But again the goal is authenticity and if keyboard manufacturers could achieve that goal (like the mp3 file I posted) then that's saying something and would be a real delight for professional musicians of all stripes. Until then we'll have to settle for what they give us or if you are unhappy with certain voices you can always hold on to your wallet until something more satisfying comes along.