Utilised in genres as disparate as modern and traditional classical, folk, techno, Chicago blues and even heavy metal, the repetition of a single note or chord of fixed pitch - otherwise referred to as a "drone" - serving as permanent focus in a given opus, has graced as many compositions as it has influenced others. This compilation serves as a much anticipated but never before compiled guidebook to the finest examples of the use of drone throughout the age of magnetic tape, albeit in forms outside those loosely labeled "modern music".