Swara is the South Asian concept of a musical note. There are seven principal swaras, named Sa, Re, Ga, Ma, Pa, Dha, Ni — abbreviations of the Sanskrit Shadja, Rishabh, Gandhar, Madhyam, Pancham, Dhaivat, Nishad. Sung as solfège, this sequence is the sargam.
Five of the seven can be flattened (komal) or, in Ma's case, sharpened (tivra); Sa and Pa are fixed (achal). The particular selection and treatment of swaras is exactly what distinguishes one raag from another, and which swara is the vadi (most prominent) colours its mood.
Unlike Western fixed pitch, Sa is a movable tonic: the singer chooses a comfortable Sa and every other swara is tuned in relation to it.
