#1
I am wondering what the thing Joe Satriani does when he put his picking hand towards the nut and leaves his fretting hand towards the lower frets like around 15-22. An example would be nice.
#2
That is called "String Dampening," which he uses in Mystical Potato Head Groove Thing
It eliminates the need for picking!!
#4
it is like tapping, but the overtones don't fire the other strings up and make the whole thing go to waste with excess noise.