The swara differs from the shruti concept in Indian music. A shruti is the smallest gradation of pitch that a human ear can detect and a singer or instrument can produce. A swara is the selected pitches from which the musician constructs the scales, melodies and ragas. The ancient Sanskrit text Natya Shastra identifies and discusses twenty two shruti and seven swara. The swara studies in ancient Sanskrit texts include the musical gamut and its tuning, categories of melodic models and the raga compositions.
Source: Svara – Wikipedia