Veteran filmmaker Singeetham Srinivasa Rao, at 94, directs ‘Sing Geetham’, a unique musical fantasy where characters communicate solely through song. Producer Nag Ashwin highlights the challenge of executing this unprecedented concept, which took a year to develop with composer Devi Sri Prasad. The film, a nearly 40-year-old dream, prioritizes Singeetham’s signature humor and humanity.