William Forde Thompson (2014)۔ Music in the Social and Behavioral Sciences: An Encyclopedia۔ SAGE Publications۔ صفحہ: 1693–1694۔ ISBN978-1-4833-6558-9; Quote: "Some Hindus believe that music is one path to achieving moksha, or liberation from the cycle of rebirth", (...) "The principles underlying this music are found in the Samaveda, (...)".
Forster 2010, pp. 564–565, Quote: "In the next five sections, we will examine the evolution of South Indian ragas in the writings of Ramamatya (fl. c. 1550), Venkatamakhi (fl. c. 1620), and Govinda (c. 1800). These three writers focused on a theme common to all organizational systems, namely, the principle of abstraction. Ramamatya was the first Indian theorist to formulate a system based on a mathematically determined tuning. He defined (1) a theoretical 14-tone scale, (2) a practical 12-tone tuning, and (3) a distinction between abstract mela ragas and musical janya ragas. He then combined these three concepts to identify 20 mela ragas, under which he classified more than 60 janya ragas. Venkatamakhi extended (...).". sfn error: no target: CITEREFForster2010 (help)