It would be something like Vocaloid and other virtual singers, but with a more realistic sound. I'd love to know if you are interested in such a tool, what kind of features you'd like, etc. What would you use it for? We also have a demo. I'm not allowed to post links yet but googling "komponant SING" will take you straight to it. It's only a proof of concept (not actual demo of our app), and we hope to get a better result ultimately.