Amazon.com description: Product Description: Perpetual Frontier /The Properties of Free Music describes the way free music is constructed through the processes of synthesis, interpretation, and invention. With descriptive sections of four seminal methodologies Unit Structures, Harmolodics, Tri-Axium Theory, and European Free Improvisation, as well as sections on how specific properties are consistently used and re-formulated in the construction of free music. This material, which the author developed through years of performing and teaching, is concise and coherent, making it clear for listeners and musicians alike, and thereby setting a new standard for the understanding and study of the most inherently forward-seeking musical form of our time. Features contributions in the form of answers to a questionnaire by 15 renowned free music artists: Marilyn Crispell, Charles Downs (aka Rashid Bakr), Simon H. Fell, Agustí Fernández, Mary Halvorson, Katt Hernandez, Joe McPhee, Nicole Mitchell, William Parker, Jamie Saft, Matthew Shipp, Ken Vandermark, Alex Ward, Nate Wooley and Jack Wright.