no one knows for sure. i don t think we ll ever know for sure. reporter: and he is way more than a human ipod because ipods don t improvise. reporter: nick watt, abc news, london. huh. that kind of god-given talent is to me staggering. if you want to learn more about this guy, his mentor who you saw in the piece, he wrote a book derek s biography. in the key of genius. indeed. that is the news for this half hour. don t miss our updates on facebook. wnwnwnwnwnwnwnwnwnwnwnwnwnwnwnwe
play him a tune he has never heard before. he can play it right back. crazy in love with a flourish. yea! derek is continually reinventing the material. he is not an ipod at all. no, no, no. you re an ipod with a creativity chip, derek. reporter: unable to see or communicate at the age of 2 the, derek started banging a keyboard. and he hasn t stopped since. he is what i call an exceptional cognitive environment when the whole mind becomes focused on this one thing. reporter: you say you think? you don t know for sure.