Pure 432 Hz tone. Other useful frequencies here: https://www.youtube.com/playlist?list=PLcxakDWTy--FMpvWk640MlCWX5hXz0aui https://www.youtube.com/playlist?list=PLcxakDWTy--GAqbn5ci0jEvqTDHYLcukN Please, use low volume while listening. Listening to this frequency is not a substitute for psychological or medical treatment.