Fact: Sound vibrations move and alter matter The purpose of sound has forever been used primarily for communication or entertainment, but the true benefits of sound are, also, known to be an ancient method of healing. The benefits are felt when people speak, sing, hum, chant and, as Laurel Elizabeth Keyes discovered and explained in her groundbreaking book, they are realised while toning. Toning is the process of realigning the balance of those energies through the vibrations created by the voice. One person who found life-changing results from TONING is Don Campbell, best-selling author of 'The Mozart Effect' who credits much of his success to the tools he acquired from TONING. In this new, updated edition, Don has shared his experience and enhanced the original work to show readers today how life can be changed by learning how to control life forces and reform life patterns through sound and thus stimulate healing in the body. The bonus CD contains original recordings of Laurel Keyes as she speaks about the powers of tone along with Don Campbell's comments and a Toning demonstration.