The most powerful uses of binaural beats employ an entrainment strategy, in which a session begins at the likely current dominant frequency of the brain, and gradually adjusts it to the desired frequency.
Played through headphones, binaural beats have long been used to alter the dominant frequency of brain activity, with a variety of goals: deep sleep, hypnotic induction, meditation, conscious relaxation, concentration, cognition, and problem solving are the most common.
Binaural Beat Builder Pro can be used to produce any frequency of binaural beat, from simple single-frequency playback, to complex entrainment sessions.