Guitar lessons: Open chords and barre chords are great for acoustic strumming and big ringing sounds, but, for more focussed riff s and quicker changes, try playing only three or four strings from a ...

All you have to do is rapidly bend a string up and down with your fret hand. Not by much - just enough to create a fluctuating, warbling sound effect. Players such as BB King, Brian May, Slash, Eric ...