The prime nuances of Vedic grammar, accent and articulation are preserved in the Shiksha and Pratisakhya texts, which pertain to the Vedangas (Vedic auxiliaries). The Siksha texts on phonetics clearly depict the manner of articulation of speech, sounds, their number and classification. The place of articulation of each sound and the effort involved in pronunciation are as clearly specified as in a modern work on linguistics. Indeed, these texts have proved to be the real instrument in preserving the Vedic lore intact in the matter of pronunciation and group chanting.
The different sakhas (recensions or schools) of Vedas present different modes of articulation, for which reason each (prati), sakha (recension) may have its own prati-sakha text, clearly specifying its own mode of articulation, something not present in the literature of any other ancient civilization. Thus, for Rig Veda, we have Rig Veda-pratisakhya; for Yajur Veda of Krishna rencension, there is Taittirya-pratisakhya; for Yajur Veda of Shukla recension, we have Vajasaneyai-pratisakhya; for Sama Veda, we have Pushpasutra; and for Atharva Veda, we have Atharva Veda pratisakhya. All the sakhas do not have their pratisakhya.