I know it's not the cord or amp, have tried multiple ones and not eliminated the sound. It does sound as if it could be a static discharge. The guitar does have a pickguard, I've read about the static thing and using dryer sheets, haven't had a chance to do that yet but plan to this weekend. The sound does seem to get more noticable and more frequent after the guitar has been plugged in with the amp on for a time. It only occurs when striking the strings and as weird as this sound seems to be related to my left-hand placement on the fret board.