Composing duo Salim-Sulaiman have stayed in touch with a mass audience by performing at the FIFA World Cup and judging “Indian Idol”, but the brothers are also revered by their fellow musicians thanks to a collection of filmi tracks and background scores. In this collection of their lesser-known songs, the pair set intricately strummed guitar and delicate piano against up-to-the-minute electronic dance rhythms to dramatic, emotional effect.