Ilaiyaraaja has this notorious luck – some of his brilliant compositions never made it to the screen or public viewing. The most important one is his Symphonic Work in 5 movements with the Royal Philharmonic Orchestra (wish it gets released some day). He scored music for a documentary titled India 24 hours in 1995. There are themes from this album that are scattered around YouTube and complete album is up for download in some illegal websites. But I have no other information from this documentary, it has some scintillating themes. I have tried to compile a few here. Wish I could see the documentary.
Listen to the complete album in the following link