One of the most beautiful intros of any Hindi song I've ever heard. The use of the strings, followed by acoustic guitar and then with Kavita Baliga's sweet operatic tones is just one of the most beautiful openings that anyone could come up with for a song. I bow to thee, AR!
The combo of brass, strings, and guitar throughout the song is just outstanding! Around the 4:47 mark, when Rashid is humming, there appears to be a choir type sound along with his humming that is softly heard.

