Originally posted by lalimacefolle
As for the second answer, the long note you say is controlled feedback which you need to have volume and distortion to get. Sometimes, we make the guitar strings vibrate by facing the amp. This is the same principle, except this time, the note stays the same, and doesn't go in an harmonic one octave or a fifth higher, you might want to hear gary moore blues alive on parisienne walkways for a 20 seconds hold!!!

yeah i know this one...realy cool thing
thanks for all the people who replied this post

christoph how do you know all this theory stuff??
i noticed you answer almost every theory question on this board, so how do you know all those things?