(Nāda Yoga): The practice of listening to the subtle inner sound through which a unified consciousness is revealed. Nada Yoga was closely associated with the original Hatha Yoga, representing for some of the great Hatha Yoga masters its very coronation. Svatmarama, the author of the Hatha Yoga Pradipika, speaks of Adinatha, the primal master (i.e., Shiva) as having taught innumerable ways to achieve laya (the dissolution of the mind). However, the text particularly recommends nada anusandhana (the awareness of the inner sound): “Adinatha (Shiva) propounded innumerable paths to laya (absorption of the mind), and they are all extant. Of these, the practice of nada anusandhana (listening to anahata nada, the inner transcendental sound) is the best of them all, in my opinion.” (4:66)