I met a cat like that once. Though he wasn't blind. He had perfect pitch, and an amazing seemingly natural ability on any instrument.
he was a tenor sax player, 17 years old, already gigging full time(making his living off it) He decided he needed another instrument, to broaden the amount of gigs he could get.
He picked up DB, within a year of playing he was already impressing some of hte most venerable and amazing players I've ever known. And they told me(I haven't known him that long) that he was pretty much that good from the first time ever playing.
Supposedly, as he told me, he also had a perfect memory, and hte abilty to visualize things in his mind. Like, if he heard a piece of music being played, he was able to visualize a chart appear, then if he wished to play that piece, the chart would be in his mind, and he would be able to read it as if he was reading sheet music.
Musicians like this, are always very interesting to meet, I got very mixed feelings. He also was very socially immature, he showed respect to his elders, but that was it, very very crude sense of humor, and he was kind of a jerk to people that weren't musicians.(or people that considered themselves musicians, but didn't know anything about music or their instruments)
this kid's name was Tom catanzaro, he is going to the New school in NY, on a full ride.