Owing to Persian and Islamic influences in North India from the 12th century onwards, Indian classical music began to diverge into two distinct styles, being Hindustani music and Carnatic music.Commentaries and other works, such as Sharngadeva's Sangita Ratnakara, further elaborated on the musical concepts found in Indian classical music.By the 16th and 17th centuries, there was a clear demarcation between Carnatic and Hindustani music; Carnatic music remained relatively unaffected by Persian and Arabic influences. It was at this time that Carnatic music flourished in Thanjavur, while the Vijayanagar Empire reached its greatest extent.Purandara Dasa, who is known as the father (Pitamaha) of Carnatic Music, formulated the system that is commonly used for the teaching of Carnatic music.Venkatamakhin invented and authored the formula for the melakarta system of raga classification in his Sanskrit work, the Chaturdandi Prakasika (1660 AD).Govindacharya is known for expanding the melakarta system into the sampoorna raga scheme - the system that is in common use today.

Carnatic music was mainly patronized by the local kings of the Kingdom of Mysore and Kingdom of Travancore in the 18th through 20th centuries. The royalty of the kingdoms of Mysore and Travancore were noted composers and proficient in playing musical instruments, such as the veena, rudra veena, violin, ghatam, flute, mridangam, nagaswara and swarabhat. Some famous court-musicians and royalty proficient in music were Veene Sheshanna (1852–1926) and Veene Subbanna (1861–1939), among others.

With the dissolution of the erstwhile princely states and the Indian independence movement reaching its conclusion in 1947, Carnatic music went through a radical shift in patronage into an art of the masses with ticketed performances organized by private institutions called sabhās. During the 19th century, the city of Chennai (then known as Madras) emerged as the locus for Carnatic music.

Nature of Carnatic music :

The main emphasis in Carnatic music is on vocal music; most compositions are written to be sung, and even when played on instruments, they are meant to be performed in a singing style (known as gāyaki).Like Hindustani Music, Carnatic music rests on two main elements: raga, the modes or melodic formulæ, and tala, the rhythmic cycles.

Sruthi

Sruthi commonly refers to musical pitch. It is the approximate equivalent of a tonic (or less precisely a key) in Western music; it is the note from which all the others are derived. It is also used in the sense of graded pitches in an octave. While there are an infinite number of sounds falling within a scale (or raga) in Carnatic music, the number that can be distinguished by auditory perception is twenty-two (although over the years, several of them have converged). In this sense, while sruti is determined by auditory perception, it is also an expression in the listener's mind.

Swara Swara refers to a type of musical sound that is a single note, which defines a relative (higher or lower) position of a note, rather than a defined frequency. Swaras also refer to the solfege of Carnatic music, which consist of seven notes, "sa-ri-ga-ma-pa-da-ni" (compare with the Hindustani sargam: sa-re-ga-ma-pa-dha-ni or Western do-re-mi-fa-so-la-ti). These names are abbreviations of the longer names shadja, rishabha, gandhara, madhyama, panchama, dhaivata and nishada. Unlike other music systems, every member of the solfege (called a swara) has three variants. The exceptions are the drone notes, shadja and panchama (also known as the tonic and the dominant), which have only one form; and madhyama (the subdominat), which has two forms. A 7th century stone inscription in Kudumiyan Malai in Tamil Nadu shows vowel changes to solfege symbols with ra, ri, ru etc. to denote the higher quarter-tones. In one scale, or raga, there is usually only one variant of each note present. The exceptions exist in "light" ragas, in which, for artistic effect, there may be two, one ascending (in the arohanam) and another descending (in the avarohanam).

Raga system

A raga in Carnatic music prescribes a set of rules for building a melody - very similar to the Western concept of mode.It specifies rules for movements up (aarohanam) and down (avarohanam), the scale of which notes should figure more and which notes should be used more sparingly, which notes may be sung with gamaka (ornamentation), which phrases should be used or avoided, and so on. In effect, it is a series of obligatory musical events which must be observed, either absolutely or with a particular frequency.

In Carnatic music, the sampoorna ragas (those with all seven notes in their scales) are classified into a system called the mekakartha, which groups them according to the kinds of notes that they have. There are seventy-two melakarta ragas, thirty six of whose madhyama (subdominat) is sadharana (perfect fourth from the tonic), the remaining thirty-six of whose madhyama (subdominant) is prati (an augmented fourth from the tonic). The ragas are grouped into sets of six, called chakras ("wheels", though actually segments in the conventional representation) grouped according to the  supertonic and mediant scale degrees. There is a system known as the katapayadi sankhya to determine the names of melakarta ragas. 

Ragas may be divided into two classes: janaka ragas (i.e. melakarta or parent ragas) and janya ragas (descendant ragas of a particular janaka raga). Janya ragas are themselves subclassified into various categories.

Tala system Tala refers to a fixed time cycle or metre, set for a particular composition, which is built from groupings of beats.Talas have cycles of a defined number of beats and rarely change within a song. They have specific components, which in combinations can give rise to the variety to exist (over 108), allowing different compositions to have different rhythms. Carnatic music singers usually keep the beat by moving their hands up and down in specified patterns, and using their fingers simultaneously to keep time. Tala is formed with three basic parts (called angas) which are laghu, dhrtam, and anudhrtam, though complex talas may have other parts like plutam, guru, and kaakapaadam. There are seven basic tala groups which can be formed from the laghu, dhrtam, and anudhrtam: Dhruva tala Matya tala Rupaka tala Jhampa tala Triputa tala Ata tala Eka tala A laghu has five variants (called jaathis) based on the counting pattern. Five jaathis times seven tala groups gives thirty-five basic talas, although use of other angas results in a total of 108 talas. Free Download Saptha Thala Alankaras Saptha Thala Alankaras