I found this, http://www.kramerforum.com/forum/showthread.php?t=49908 , which has a some videos of guitarists doing "Flight of the Bumble Bee" at 320bpm...one setting a Guinness record. Interesting. I don't know what the playing equates to in npm.
Got any suggestions for a freebie, online metronome that does 600bpm?
"It takes a lot of devotion and work, or maybe I should say play, because if you love it, that's what it amounts to. I haven't found any shortcuts, and I've been looking for a long time."
-- Chet Atkins
-- Chet Atkins