Dhaka, March 16 -- Inside his shop in Srinagar, tailor Farooq Ahmad Shaksaaz presses a button on his vintage 1970 Sharp cassette player. With a familiar clack, the machine comes to life, crackling for a moment before the soulful voice of Ghulam Ahmad Sofi fills the air, singing about divine love and longing for the creator.

Shaksaaz inherited his deep appreciation for Kashmir's Sufi music from his grandfather, along with a carefully preserved collection of cassette tapes from the 1970s. As he sews, he immerses himself in the melodies, belonging to a niche yet devoted group of listeners who insist that cassette tapes offer the purest experience of Kashmir's spiritual music.

In Indian-controlled Kashmir, Sufi music-rooted in the teachings...