Often translated as "The Rising of the Sound of Shiva," this text is a seminal treatise on Swar Shastra (the science of breath). It is a dialogue between Lord Shiva and his consort, Goddess Parvati, where Shiva reveals the hidden mechanics of the universe through the rhythm of the breath.
Active when both nostrils flow equally. It is considered "cruel" for worldly matters but ideal for meditation and spiritual realization. Practical Guide to Swara Activity shiva swarodaya pdf