Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.R ga (Sanskrit, lit. "colour" or "mood") refers to melodic modes used in Indian classical music. It is a series of five or more musical notes upon which a melody is made. In the Indian musical tradition, r gas are associated with different times of the day, or with seasons. Indian classical music is always set in a r ga. Non-classical music such as popular Indian film songs or ghazals sometimes use r gas in their compositions.