Musicological Texts

The treatise Sangeetha Ratnakara, composed by Sarngadeva in the 13th century, is one of the most authoritative texts on Indian classical music, bridging both Carnatic and Hindustani traditions. Chapter on Tala:

The chapter that deals with Tala is called “Tala Adhyaya”.
It describes the structure of talas, angas (components), laya, and various tala classification systems including the Shadangas.
Other Name for the Treatise:

The Sangeetha Ratnakara is also referred to as the “Ocean of Music” or “Music's Jewel Mine”.
Sometimes simply known as the "Ratnakara" in scholarly references.
Importance:

Acts as a crucial link between ancient and modern Indian music.
Forms the basis for later works and commentaries in both systems.