I dare anyone to record the same song as the demo in your keyboard and place on this forum.

Yes, if you have all the knowledge that the performers and engineers have, then you might be able to. That would include the ability to create special sounding instruments with effects that most of us do not understand and spending more time than we wish to give – it is their 9 to 5 five days a week job. They get paid to create demos.

IN my humble opinion, John C.