Sharngadeva's , the encyclopedic magnum opus on Indian music. It was about dancing and aesthetics of the thirteenth century. In the work, Kallinatha meticulously annotated, explicated, criticised and emphasised all the central issues of the ; he also illumined it through comparison with contemporary practices, theories and norms of music and dance. He anticipated many developments in these arts. Bhandaru Vittaleshwara's commentary A Telugu commentary by Bhandaru (-ri?) Vittaleshwara on the in the last quarter of the fifteenth century forms the fourth of the navaratnas. Sangitasuryodaya In 1525, Vittaleshwara's son Bhandaru (ri?) Lakshminarayana composed the fifth treatise, the , under the patronage of king Krishnadevaraya of Vijayanagara. Talakalabdhi/Talakalavriddhi In the generation that immediately followed, Achyutadevaraya's was written. This was an important treatise on . This work organizes for the first time the theory and practice of the of the Haridasas in terms of the . In the work, he also compiles views from several earlier works on such as Talakalavilasa, Sangitavidyavinoda, Jainamata, Sangitamarga, Chaturasabhavilasa, Sangitachudamani, Anjaneyamata, Nrttachudamani, Sangitamanidarpana, Katyayaniya, Sangitarnava, Rangaraja Bharatabhashya, Kapardi, and Parameshvara (all of them non-extant), and refutes them. Further, Achyutaraya applies all the five to each and thereby expands the scope and function of the . Around the same time, Ashtavadana Somabhatta composed the or under the guidance of his guru Sitarama and probably under Achyutaraya's patronage. This work is now available only in fragments. Swaramelakalanidhi The final 'gem' in the series is the much celebrated authored by the illustrious Kallinatha's grandson, Ramamatya ca. 1550. Ramamatya was the royal composer and architect in the court of de facto king Aliya Rama Raya. He described himself as and (meaning "the hero" (malla) who wears the honorific anklet()). The last epithet however, is usually interpreted by scholars as alluding to the Todarmal, a minister in Akbar's court, the anachronism notwithstanding. The Kannada term, in fact translates to 'the hero (malla) who wears the honorific anklet (todar)'. importance lies in the fact that it is more relevant and related to modern practice than the books written prior to it. The work, spread over five chapters deals primarily with and preliminary to it, describes the for the classification of - and the different and constituting the . Similar works by other celebrated contemporaries like Pandarika Vitthala and Somanatha project a common theme, namely the description of , classification under and the enumeration of the and constituting the . Minor ideological