In total how many Shrutis are there in Hindustani Sangeet?

Shruti is the smallest audible interval of pitch recognised in Indian classical music theory. Classical Indian musicology divides one octave (saptak) into a fixed number of these microtonal intervals, and this division underlies the placement of the seven basic swaras (Sa, Re, Ga, Ma, Pa, Dha, Ni) and their variants.

Applying this framework to Hindustani Sangeet specifically: the octave is conventionally held to contain 22 Shrutis in total, a count established in classical Indian musicological texts (going back to Bharata's Natya Shastra) and used consistently across Hindustani music theory. So the correct total asked for here is 22.

• 12 refers to a different, coarser measure — the number of svara-sthanas (semitone-equivalent note positions within an octave, comparable to the 12 keys of an octave on a harmonium) — not the finer microtonal shruti count.

• 13 does not correspond to any standard count used in Hindustani Sangeet theory — it matches neither the basic swara count, the note-position count, nor the shruti count.

• 9 is more commonly associated with the Navarasa — the nine principal aesthetic sentiments described in the Natya Shastra — a related but distinct classical concept from the shruti count of Hindustani Sangeet.

Cross-checking against the classical framework — 7 basic swaras, 12 note-positions (svara-sthanas), and 22 shrutis — confirms that the total number of Shrutis in Hindustani Sangeet is 22.