bear wrote:Brad appeared to have some kind of wire/string attached to either his guitar or pedal board that he moved up and down with his hand and it changed tones like a theremin....not really sure what was going on.
It's a long piece of sewing thread, tied to one of the strings near where the string meets the bridge. Brad pulls the thread to make it taut, then slides his fingers along it, which imparts a vibration (like that of a violin bow) to the string.