Hemi-Sync CD metamusic 【Ascension】 What is Hemi-Sync? Hemi-Sync is an audio technology developed by the Monroe Institute in the United States. It uses different frequencies played in each ear to adjust brainwaves, thereby guiding the state of consciousness. It can lead to various states of consciousness, such as meditation, concentration, and relaxation. Effects vary from person to person. Please contact me if you are purchasing with other CDs. A small discount is possible.