The following content is related to the September 2012 issue of Guitar World. For the full range of interviews, features, tabs and more, pick up the new issue on newsstands now, or in our online store: http://store.guitarworld.com/?&utm_source=guitarworld.com&utm_medium=secondarynav&utm_campaign=store
A pedal point is a single note sustained (or repeatedly articulated) against a moving melody. It adds dimension to a melody by highlighting its "push and pull" against a central note, which is usually, not not exclusively, the tonic of the key or root note of a chord.