The Raga system is both a musical theory and a philosophy of time, emotion, and the sacred. The tradition associates specific Ragas with specific times of day (Bhairav at dawn, Yaman at dusk, Bhairavi at sunrise), seasons (Malhar Ragas with monsoon, Hindol with spring), and emotional states (Bhairav: devotion and pathos; Bhimpalasi: longing; Desh: romantic; Durga: power). This is not decoration: the tradition holds that performing a Raga at the wrong time is artistically and spiritually dissonant — the Raga's emotional character is linked to the cosmic moment.
The parent scale system: both Carnatic (South Indian) and Hindustani (North Indian) music organise Ragas into parent scales. Carnatic: 72 Melakarta scales (parent scales from which all Ragas are derived). Hindustani: 10 Thaats (parent scales identified by Vishnu Narayan Bhatkhande in the early 20th century). The total number of named Ragas in both traditions combined runs into the thousands; the most commonly performed are perhaps 100-200. Source: Bor (1999).
Nada Brahman — sound as ultimate reality
Indian classical music rests on the philosophy of Nada Brahman — Brahman as primordial sound. The universe arises from Nada (sound vibration), and music is the most direct human engagement with that primordial vibration. The Sama Veda — one of the four Vedas — is entirely set to music: its 1,875 verses are Rig Vedic mantras rearranged and sung in specific melodic patterns (Samans). The Sama Veda singers (Udgatri priests) are the original classical musicians of the tradition. The link between Vedic chant and Raga-based classical music runs directly through the Sama Veda's melodic systematisation. Source: Bor (1999).
Dhrupad — the oldest surviving classical form
Dhrupad (from Dhruva-pada: fixed verse) is the oldest surviving form of Hindustani classical music, dating to the medieval period. It was the primary court form of the Mughal period: Tansen (c.1506–1589), the most celebrated musician in Indian history, was a Dhrupad master at Akbar's court. Dhrupad is characterised by its gravity, its long Alap (unaccompanied Raga exposition), and its use of the Pakhawaj drum. The tradition of performing Dhrupad as a spiritual practice — the music as a form of devotion rather than entertainment — remains alive in the Dagar, Gundecha, and Mallick gharanas (lineages). Source: Bor (1999).
Bor (1999). Ghosh (1967).
The Raga-Ragini system — the musical cosmology
Medieval music theory personified Ragas as male and female: 6 principal male Ragas (Ragas) each with 5 female companions (Raginis) and 8 sons (Putra Ragas) — producing 126 total forms in the most common enumeration. The Ragamala paintings (Raga-garland) — a major genre of Rajput and Mughal miniature painting — depicted each Raga and Ragini as a specific scene or figure. The paintings linked music, poetry, season, time of day, and visual art in a single cosmological system: each Raga had its moment in cosmic time, its emotional character, and its visual embodiment. The Ragamala tradition is one of the most cross-disciplinary artistic achievements in any culture. Source: Bor (1999).