Hatha Yoga Pradipika gives the following variant titles, gleaned from different manuscript colophons: "Haṭhayogapradīpikā", "Haṭhapradīpikā", "Haṭhapradī", "Hath-Pradipika". The "Hatha Yoga Pradīpikā" was composed by Svātmārāma in the 15th century CE. as a compilation of the earlier hatha yoga texts. Svātmārāma incorporates older Sanskrit concepts into his popular synthesis. In the "Hatha Yoga Pradīpikā," Svātmārāma introduces his system as preparatory stage for physical purification that the body practices for higher meditation or yoga. It is based on asanas (postures) and pranayama (breathing techniques). "Hatha Yoga Pradīpikā" lists thirty-five earlier Haṭha Yoga masters (Skt. siddha), including Ādi Nātha, Matsyendranātha and Gorakṣanātha. The work consists of
Ashtanga vinyasa yoga asana practice, but also stated that the breathing should be deep breathing with sound. He reiterated this notion in a conference in 2013 stating, "You do normal breath, inhalation and exhalation with sound. Ujjayi breath is a type of prāṇāyāma. This is just normal breath with free flow". In 2014 published on YouTube, Manju Jois dodged the question, "What is the difference between Ujjayi breathing and free breathing?" by saying that "the breathing in Ashtanga should be long and deep with the sound like the ocean". He also states that if you don't make sound, that is okay, too. However