Nusrat Fateh Ali Khan's long-lost recordings have been rediscovered and compiled into a new album, Chain of Light. The album was released for the first time in September this year, 27 years after Khan died. BBC Urdu’s Ahsan Mahmood and Rubab Batool met with the team behind the discovery to explore how the album was found and the journey that led to its release. Archive Footage: Real World Records Extra Footage: Saiyna Bashir Studios Stock Footage: Getty Images Chain of Light "Ya Gaus Ya Meeran"