Strong, regular pulsed single tones used to open the mind for change by causing the brainwaves to synchronize to the tempo of the beat, a tempo that is known to have certain qualities. A modern technological version of listening to steady drumming.
Readers, please enjoy this guest blog post by Sandra Kynes, author of several books, including The Herb Gardener's Essential Guide, Plant Magic, and the new Witches' Encyclopedia of Magical Plants, among many others.
Although a few old books...