National Award-winning music director D Imman, known for his super hit rural music, has scored music for superstar Rajinikanth's Annaatthe. The signature song in the film introducing Rajinikanth was sung by late singer S P Balasubramaniam, who died of Covid-19 in September last year. This happened to be his last number. In a conversation with NDTV's Sam Daniel, D Imman opened up about working with Rajinikanth, S P Balasubhramanyam's last track and engaging a team of talented visually challenged singers.