Capital letters stand for higher / tivre / sharp notes.
Small letters stand for lower / komal / flat notes.

Table below shows complete index for the notes.

Symbol	Carnatic Equivalent	Western Equivalent	Hindustani Equivalent
S	Shadja	C	Shadja
r	Suddha Rishabha	D Flat	Ri Komal
R	Chatusruti Rishabha	D Sharp	Ri Tivre
g	Sadharana Gandhara	E Flat	Ga Komal
G	Antara Gandhara	E Sharp	Ga Tivre
m	Suddha Madhyama	F Flat	Ma Komal
M	Prati Madhyama	F Sharp	Ma Tivre
P	Panchama	G	Panchama
d	Suddha Dhaivata	A Flat	Da Komal
D	Chatusruti Dhaivata	A Sharp	Da Tivre
n	Kaisiki Nishadha	B Flat	Ni Komal
N	Kakali Nishadha	B Sharp	Ni Tivre

For the higher octave the notes is succeeded by a + sign and for the lower octave the notes is followed by a - sign. The notes present within flower brackets '{}' must be played at a higher speed than the other notes. If there is only one note present in the bracket then just give a touch of the note (don't prolong the note for a long time). That note is present to give better effect to the song. The notes present inside simple brackets '()' stand for the intrumental sounds which sometimes forms an integral part of a song. Usually if a note has to be prolonged it is followed by a series of dots. But the number of dots don't signify the duration of the note. That you can get by trying out for yourself. Note that these notes gives you only an outline of the song. You can perfect the song by experimenting with these notes. Checkout hindi songs notations table.