Sangita Ratnakara
The Sangita-Ratnakara, संगीतरत्नाकर, (IAST: Saṃgītaratnākara), literally "Ocean of Music ", is one of the most important musicological texts from India. Composed by Śārṅgadeva (शार्ङ्गदेव) in Sanskrit during the 13th century, both Carnatic music and Hindustani music traditions of Indian classical music regard it as a definitive text.