Jan1, 2021 - 8 Hours Deep Sleep without music. There is about 2 minutes of music at the beginning to enable you to set the volume correctly for easy listening. After the music fades out, do not adjust your volume.  If you need to stop and readjust for loudness, please return to the beginning. All other sounds are subliminal Entrainment Tones, which you cannot hear with your ears, however, you brain is aware of these frequencies and by matching them will help you get to sleep quicker and easier and stay asleep longer. Sound Sleep is essential to Good Health as well as to our ability to function effectively in all aspects of our life.  Sleep deprivation complications over time may include such things as Increased risk for depression and mental illness - Increased risk for stroke, heart disease, and asthma attack - Increased risk for potentially life-threatening complications, such as car accidents, and untreated sleep disorders like insomnia, sleep apnea, and narcolepsy Hallucinations Severe mood swings.