Shakala Shaka (Sanskrit: à ¤¶à ¤¾à ¤Âà ¤² à ¤¶à ¤¾à ¤Âà ¤¾; IAST: à ÂÃÂkala à ÂÃÂkhÃÂ), is the oldest shakha (from skt. à ÂÃÂkhàf. "branch" or "recension") of the Rigveda. The à ÂÃÂkala tradition is mainly followed in Maharashtra, Karnataka, Kerala, Odisha, Tamil Nadu and Uttar Pradesh. The MahÃÂbhÃÂá¹£ya of Patañjali refers to 21 à ÂÃÂkhÃÂs of the Rigveda; however, according to à Âaunaka's Caraá¹Âa-vyuha there are five à ÂÃÂkhÃÂs for the Rigveda: the à ÂÃÂkala, BÃÂá¹£kala, Aà Âvalayana, à Âaá¹ khÃÂyana, and MÃÂá¹Âá¸ÂukÃÂyana, of which only the à ÂÃÂkala and BÃÂá¹£kala and few of the Aà Âvalayana are now extant. The only complete recension of Rigveda known today is of the à ÂÃÂkala School. There is a claim that à Âaá¹ khÃÂyana à ÂÃÂkhàis still known to a few Vedapathis in Uttar Pradesh and Gujarat but this is not certain.
The main saá¹Âhitàfor à ÂÃÂkala SÃÂkhàis the à ÂÃÂkala Saá¹Âhitàand the corresponding brahmana is Aitareya BrÃÂhmaá¹Âa. The main Upaniá¹£at of the à ÂÃÂkala à ÂÃÂkhàis Aitareya Upaniá¹£at. The à Ârauta Sà «tram for à ÂÃÂkala ShÃÂkhàis ÃÂà ÂvalÃÂyaá¹Âa à Ârauta Sà «tra and the Gá¹Âhya Sutra is ÃÂà ÂvalÃÂyana Gá¹Âhya Sà «tram. The ÃÂraá¹Âyaka of à ÂÃÂkala à ÂÃÂkhàis Aitareya ÃÂraá¹Âyaka.
à Âikṣàas a term for phonetics, is first used in Taittirëya Upaniá¹£ad, which gives its various components which include Varna (individual sounds) and Svara (accent). The Pratishakhyas are among the earlier texts of Shiksha. Pratià ÂÃÂkhya literally means " belonging to each à ÂÃÂkhÃÂ". In the Rigveda the Pratishakhya available today is ascribed to Shaunaka. This is also known as à ÂÃÂkala Pratià ÂÃÂkhya and belongs to à Âaià Âirëya à ÂÃÂkhÃÂ, a branch of "à ÂÃÂkala à ÂÃÂkhÃÂ".
The major ÃÂchÃÂryas who belonged to the à ÂÃÂkala à ÂÃÂkhàincluded: