So sad to hear this!
He was a true natural. Someone once told me that he didn't exactly come from the usual CG background - and when asked to play a scale during his audition for a place at the Paris Conservatoire, he replied, "What's a scale?"
Obviously, the panel saw his immense natural talent! Thanks to them, we've been able to enjoy listening to a great musician and play his wonderful compositions.
“Do what you can, with what you have, where you are”. Theodore Roosevelt