Hemi-Sync CD "The Visit" Japanese guidance included. Sound technology for altered states of consciousness. The CD has no scratches, but the case is cracked and has a hole (see photo). What is Hemi-Sync? It is an audio technology developed by the Monroe Institute in the United States that 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 meditative states, focused states, and relaxed states. Individual results may vary. Please contact me if you wish to purchase this with other CDs. A small discount is possible.