Ragas are patterns of notes but are different to a Western scale or melody. They are really a combination of both. Each rag:
Rag Desh is a late evening rag associated with the monsoon season. In Indian music a system known as sargam is used for naming the notes: Sa, Re, Ga, Ma, Pa, Dha, Ni, Sa. The tonic, or ground note, is Sa (this is heard in the drone). Two other important notes in Rag Desh are Pa and Re.