|   INTRODUCTION:                         The  origin of Carnatic music , or the South Indian classical music can be  traced back to the age of  vedas . Bharata's Natya Sastra , from around  the 5th century A.D. , and Saranga Deva's Sangita Ratnakara , from the  early13th century A.D. , are considered the to be the earliest recorded  documents available on the theory and performance of Indian classical  music . The history of Carnatic music is incomplete without stating  about the contributions made by the saints Sri Purandharadasaru ( 15th  century A.D.) , Sri Thyagarajar , Sri Shyama Sastri ( all of 18th  century A.D.) , and left an enduring legacy of compositions. This  tradition has a rich heritage and is perfectly attuned with Indian  culture and religion. Carnatic music is based on a 22 scale note  (swaras) on contrary to the earlier 12 note scale that is used in the  western classical music. But in all its practical aspects and puposes,  not more than 16 notes are generally used. A unique combination of these  notes , or swara as they are said to evolves separate  ragas. The  features and the constraints of a raga will be clearly defined in the  arrangement of the notes in its arohanam ( ascending notes ) and  avarohanam ( descending notes ). Thus , in Carnatic music , the raga  connotes a mood or a route in which the music is supposed to travel. .  Different combinations of the notes gives rise to different raga . Thus ,  there are thousands of unique raga as per theory though very few of  them are being used for performances in the present day. gamaka and  brighaa are the two most important features of the ragaa. The former  refers to the modulation of the frequency of a particular swara and the  latter refers to the speed with which the musician performs a set of  swaras or notes. Both the gamaka and the brigha helps to improve the  appeal of the composition that is rendered . Western music is often  based ona pattern of flat notes, on the contrary, here , the swaras are  performed using various modulations . The brigha could be often 8 , 16  or so on . Another very important aspect of the Carnatic music is the  thalam or the rhythm. The thalam is the rhythm of the piece that is  being performed . Today, there exists more than hundred thalams , but  here also, very few of them are in use . The most popular thalam have  three , four , five, seven or eight beats in them. The Melakarta Ragams The Melakarta Ragams refers to the basic 72 Janaka (parent) ragams for all of the infinite number of other ragams in Carnatic Music. All of these ragams have seven notes saptaswaras, that is that they have all seven swaras which are- Sa, Ree, Ga, Ma, Pa, Da, Ni, and Sa. The system is further divided into two sets of 36 ragams each - The first set with the first Ma and the second with a sharper Ma . This is very similar to the Western concept of scales and the circle of flats. Sapta Talas This system of talams is the rythmic basis for Carnatic music. It is based on 7 core talas whcih use only 3 of the 6 possible components of an Indian talam - Anudrutam, Drutam, Laghu, Guru, Plutam, and Kakapadam. The Seven Talams are Dhruva, Matya, Rupaka, Jhampa, Triputa, Ata, and Eka Talams. Using these sapta talas all of the 150 Carnatic talams can be derived. 12 Chakras of music the mind, body and soul Indian classical music, philosophy, yogic teachings - many of these are attributed to have its roots in the four vedas. In the human endeavour of our self-realization and awakening towards the oneness with the nature and the creator, classical music, philosophy and yogic teachings are all considered as the experiential tools. For centuries, we have excelled in exploring various aspects and are constantly redefining with every passing phase of time and years. But at the core of it are these ever so relevant well-defined principles and tenets – principles that provide the unity and the synergy of power. Be it in the form of millions of musical notes that cast a magic spell, or the control of our body and mind to lead us to greater heights. These do lead us to the path of happiness... utter bliss. These have no geographic barriers and transcend across all nations and culture. Larsen and Toubro Limited, India’s largest engineering and construction major recognizes and cherishes these Tenets and Principles that live beyond time. Principles and Values that never change but get to redefine its relevance within modern times, thereby making it stay for ever - as a classic beyond time and ages. BRIEF SUMMARY: | 
Sruti
| Shrutis | 12-TET Notes | ||||
|---|---|---|---|---|---|
| Name | Ratio | Cents | Frequency (Hz) | Name | Frequency (Hz) | 
| Kṣobhinī | 1 | 0 | 261.6256 | C | 261.6256 | 
| Tīvrā | 256/243 | 90 | 275.6220 | C♯ | 277.1826 | 
| Kumudvatī | 16/15 | 112 | 279.0673 | ||
| Mandā | 10/9 | 182 | 290.6951 | D | 293.6648 | 
| Chandovatī | 9/8 | 203 | 294.3288 | ||
| Dayāvatī | 32/27 | 294 | 310.0747 | D♯ | 311.1270 | 
| Ranjanī | 6/5 | 316 | 313.9507 | ||
| Raktikā | 5/4 | 386 | 327.0319 | E | 329.6275 | 
| Raudrī | 81/64 | 407 | 331.1198 | ||
| Krodhā | 4/3 | 498 | 348.8341 | F | 349.2282 | 
| Vajrikā | 27/20 | 519 | 353.1945 | ||
| Prasāriṇī | 45/32 | 590 | 367.9109 | F♯ | 369.9944 | 
| Prīti | 729/512 | 612 | 372.5098 | ||
| Mārjanī | 3/2 | 702 | 392.4383 | G | 391.9954 | 
| Kṣiti | 128/81 | 792 | 413.4330 | G♯ | 415.3047 | 
| Raktā | 8/5 | 814 | 418.6009 | ||
| Sandīpanī | 5/3 | 884 | 436.0426 | A | 440.0000 | 
| Ālāpinī | 27/16 | 906 | 441.4931 | ||
| Madantī | 16/9 | 996 | 465.1121 | A♯ | 466.1638 | 
| Rohiṇī | 9/5 | 1017 | 470.9260 | ||
| Ramyā | 15/8 | 1088 | 490.5479 | B | 493.8833 | 
| Ugrā | 243/128 | 1110 | 496.6798 | ||
| Kṣobhinī | 2 | 1200 | 523.2511 | C | 523.2511 | 
                                   Śruti   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
The swaras in Carnatic music are slightly different in the twelve-note system. There are three types each of Rishabha, Gandhara, Dhaivatha and Nishadha. There are two types of Madhyama, while Panchama and Shadja are invariant.
| Position | Swara | Short name | Notation | Mnemonic | 
|---|---|---|---|---|
| 1 | Shadja | Sa | S | sa | 
| 2 | Shuddha Rishabha | Ri | R1 | ra | 
| 3 | Chathusruthi Rishabha | Ri | R2 | ri | 
| 3 | Shuddha Gandhara | Ga | G1 | ga | 
| 4 | Shatsruthi Rishabha | Ri | R3 | ru | 
| 4 | Sadharana Gandhara | Ga | G2 | gi | 
| 5 | Anthara Gandhara | Ga | G3 | gu | 
| 6 | Shuddha Madhyama | Ma | M1 | ma | 
| 7 | Prati Madhyama | Ma | M2 | mi | 
| 8 | Panchama | Pa | P | pa | 
| 9 | Shuddha Dhaivatha | Dha | D1 | dha | 
| 10 | Chathusruthi Dhaivatha | Dha | D2 | dhi | 
| 10 | Shuddha Nishadha | Ni | N1 | na | 
| 11 | Shatsruthi Dhaivatha | Dha | D3 | dhu | 
| 11 | Kaisiki Nishadha | Ni | N2 | ni | 
| 12 | Kakali Nishadha | Ni | N3 | nu | 
              As you can see above, Chathusruthi Rishabha and Shuddha Gandhara   share  the same pitch (3rd key/ position). Hence if C is chosen as   Shadja, D  would be both Chathusruthi Rishabha and Shuddha Gandhara.   Hence they  will not occur in same raga together. Similarly for two   swaras each at  notes 4, 10 and 11.
| 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.[22] 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 subdominant), which has two forms. A 7th century stone inscription in Kudumiyan Malai[24] 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). | 
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| Raga system | 
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