Nothing special about my voice,says Amitabh Bachchan

'Shamitabh' revolve around an ego clash between two artistes but the actor does not believe in ego."I keep pestering Balki in the night. I will call him andsay, 'Balki, I don't think I did good, can we do it again'. Balki is like, 'No, no, you have done fine.' When you step back and see the whole vision that only the director knew, you realise that he was right because he was thinking about the whole film while you were thinking about only yourself."