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.
That is called "String Dampening," which he uses in Mystical Potato Head Groove Thing
It eliminates the need for picking!!
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.