Suddenly, there was a lot of subtlety in films then. Many people say that Lata Mangeshkar was partly responsible for this change because she had a softer voice. Lata ji was rejected initially when she came to the industry. S Mukherjee, who was a big producer and a partner with my grandfather, had said she would never succeed because her voice is too thin. At that time, people didn't see the future with a microphone.
People sound different when they sing into the microphone.
Rafi's voice too, was soft. He would talk in whispers. But he sang the Yahoo kind of songs too. Lata ji completely overshadowed every other singer those days. Gradually, it was only her.