A raga is a complex structure of musical melody used in the Indian classical music. It is a set of rules of how to build a melody which can ignite a certain mood in the reciter and listeners. The Sikh holy book, Guru Granth Sahib, is composed in and divided by 31 ragas. Each raga is a chapter or section in the Guru Granth Sahib starting with Shree raag, and all the hymns produced in Shree raag are found in this section ordered chronologically by the Guru or other Bhagat that have written hymns in that raga.
The following are the ragas that are used in the Guru Granth Sahib:
Ragas have a direct relationship to human moods and the following are the connections between Ragas and feeling:
In addition to raag names, there exists an indication in the titles of hymns called ghar. The precise meaning of ghar is not fully understood, although recent research proposes it refers to raag variants.