Hemi-Sync® can help you experience and enhance mental, physical, and emotional states, by combining verbal guidance, music, pink sound and/or other audio effects with the binaural beats. The particular elements for each recording are carefully selected and integrated with the appropriate Hemi-Sync® sound frequencies to enhance the desired effect. These CDs incorporating Hemi-Sync® are applied in various ways. Many titles feature special blends of Alpha, Delta, and Theta frequencies to slow excess mental activity in order to facilitate meditation or support relaxation. Other selections feature a predominance of Beta frequencies for focus and concentration or Delta frequencies for sleep enhancement.