The hamsa yoga or soham is crowned in the Indian scriptures as the paramount spiritual endeavor that enables natural conjunction of the individual consciousness and the Bramha . Despite being superior in terms of its culminated effects, this Sadhana is easiest and free from the ascetic disciplines and difficult practices of yoga that are associated with other higher level spiritual Sadhana . The treatise of Sabda bramha-Nada Bramha (volume 19 of Pt. Shriram Sharma Acharya Vangmayaâ€ Series) devotes one full chapter to this important topic. The present book is compiled from the English translation of this invaluable text.