Hemi-Sync Metamusic [Sampler] 2-disc set What is Hemi-Sync? Hemi-Sync is an audio technology developed by the Monroe Institute in the United States. It uses different frequencies 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. Individual results may vary. Please contact me if you wish to purchase this with other CDs. A small discount is possible.