If I get an idea for a song, I have a melody for it. I'm a musician first. I'm not limited by the fretboard.
Mainstream Bollywood music has fallen into some sort of a rut where melody, which was very important 'till the '90s, is out of favor.
In 'Barfi,' we have departed from regular commercial stuff and used the melody 'Bare Bare,' sung by Sonu Nigam as the introductory song for Diganth.
With Rage, we wrote riff rock and had rap vocals, so we didn't really concern ourselves with melody for the most part.