Dattilam
Dattilam (दत्तिलम्) is an ancient Indian musical text ascribed to the sage (muni) Dattila. It is believed to have been composed shortly after the Natya Shastra of Bharata, and is dated between the 1st and 4th century AD. But Bharathamuni had given reference of the treatise " Dattilam" in his celebrated work "Natyashastra"(1-26) so there is a belief that Dattilam may be a work composed before Bharata Muni.