In this song from Romantic India, sung by Noor Jehan (Sr) who later character-acted in such films as Anarkali (1953), after the dialog I am hearing Piano, the earliest song in which I clearly can recognize it.
Listen to 1936_Romantic-India_sunaa-do-prem-kee-meeThee-taan.mp3
Now you know!
Listen to Chhaila Babu (1967)









