Hindu texts "Śruti" refers to the body of most authoritative, ancient religious texts, believed to be eternal knowledge authored neither by human nor divine agent but transmitted by sages ("rishis"). These comprise the central canon of Hinduism. It includes the four Vedas including its four types of embedded texts - the Samhitas, the Brahmanas, the Aranyakas and the early Upanishads. Of the "Shrutis" (Vedic corpus), the Upanishads alone are widely influential among Hindus, considered scriptures par excellence of Hinduism, and their central ideas have continued to influence its thoughts and traditions. The "Smriti" texts are a specific body of Hindu texts attributed
Shiksha musical performance. Individual sounds in the Sanskrit have independent personalities, and the reciter helps develop their character and their timbre, state Wilke and Moebus. Naradiya Siksa, a phonetics treatise on the Sama Veda explains this aspects of phonology with various similes, such as, Pratisakhyas are the oldest "Siksa" textbooks of each branch of the Vedas. Later Siksa texts are more specialized and systematic, and often titled with suffix "Siksa", such as the Naradiya-Siksa, Vyasa-Siksa, Pari-Siksa and Sarvasammata-Siksa. The Pratishakhyas, which evolved from the more ancient Vedic Texts padapathas (") around 800 BCE, deal with the manner in which the Vedas