(Nāda): Sound. This term is derived from the Sanskrit root nad, meaning “to flow.” It is a subtle sound that brings the flow of the dissolution of the individual consciousness, a state in which the mind is constantly focused on and fascinated by the subtle sound. The term nada is also used in Hindu musical theory to denote the subtle aspects of musical sound. There are two kinds of nada:

  1. Ahata is sound as it is normally perceived. In other words, it is the conscious realization of musical sound by human beings.
  2. Anahata is the subtle and mystical essence of sound. Anahata is heard by yogis in meditation and is not only related to anahata chakra, but can be experienced in connection to each chakra. In a yogic context, nada refers mainly to anahata nada, that subtle, ineffable sound.