Book excerpt: The origins and secrets of the Grateful Dead's magical sound are told! This book is the first in-depth examination of the Dead's technical side, including their recording methods. From the "Acid Tests" of the mid-'60s to the famous "Wall of Sound" PA setup in the '70s and on to their exceptional later touring systems, the Grateful Dead were always on the cutting edge of technological innovation and experimentation. This exhaustive study includes clear and concise explanations of the band's equipment technology, instrument design, and studio recording techniques, plus a history of the group. Features: more than 100 photos and diagrams, many never before seen; new interviews with band members and tech personnel; suggested listening for every era of the group's history; and more!