MUMBAI: Megastar Amitabh Bachchan is spending his free time composing music. "I have been busy with yes, music. And once it starts it’s a different world. Singing, composing, arranging and providing instrumentation all by myself can be arduous, but so fulfilling," Amitabh tweeted.

The 69-year-old has been off work for sometime after undergoing abdominal surgery last month. Although the actor says he is recovering well, he is still in pain. "All is well… I repair well, and gradually… but had to miss gym… urgh ! hate it when that happens… one surgical pain reappeared !" he said.