Human Plus recordings teach you how to activate the benefit of a particular selection whenever you wish without listening at the particular moment when you desire the intended effect. For example, the Human Plus title, Attention, exercise teaches you how to move into a highly focused state when not listening to the Attention exercise. Most Mind Food and Heart-Sync titles provide the experience/benefit while you are listening. For example, the Mind Food title, Concentration, helps your brain move into a highly focused state of concentration while listening. Metamusic® selections contain music and Hemi-Sync® with no verbal guidance.