In order to learn complex rhythms, over the centuries South Indian musiciansdevised a system of rhythm language called solkattu.The word Solkattu literally means bunch of syllables,and in Tamil words bound together,and form the foundation for all musicalconcepts in the Indian musical system. One conceives musical ideas and expresses them in termsof metric-syllabic structure. Originally the syllables were probably meant to mimic the sound of the drum, but over the centuries the syllables and articulation became more complex, and becamean art unto themselves.

Source: academia.edu//

Konnakol (also spelled Konokol, Konakkol) (Tamil: ) is the art of performing percussion syllables vocally in South Indian music, the Carnatic music - South Indian classical - performance art of vocal percussion. Konnokol is the spoken component of solkattu, which refers to a combination of konnakol syllables spoken while simultaneously counting the tala (meter) with the hand.[1] It is comparable[citation needed] in some respects to bol in Hindustani music, but allows the composition, performance or communication of rhythms. Sri Thetakudi Harihara Subash Chandran is a well-known exponent.

Source: wiki

.. Solkattu swaras A passage of Chitta swaras embedded with Jatis