Stereo Headphones are required to experience the benefits of the brain wave frequencies. One half hour to an hour is recommended. Personal experience is different for everybody.
Some people have profound experiences the first listening.
There is usually immediate results with the guided tapes. Since the tapes do have a cumulative effect, we recommend you listen daily for the first 6 weeks, then as needed to achieve desired states of mind. Experiment with tapes to find what works best for you. Guided Meditation, Guided Relaxation, Healing Meditation, Inner Fitness, Slim Naturally, Total Fitness-Yoga, Breakthrough Training, Power Training, Running Meditation, Walking Meditation, Arthritis, Chronic pain, Depression, Headaches, High Blood Pressure, and Insomnia. Not on this series of tapes.