Add a sound whenever we need to refill otp.

[jujhar18]

Or maybe its already there and not working for me?

[kapil-15]

I am facing the same problem

[sushrut111]

Seems like a useful suggestion.

[AshishNamdev]

Seems like a useful suggestion.

This doesn't seems to be a major change.

@sushrut111 let me try to implement this one.

You can upload the proper audio file on your gh-pages link, where you have uploaded other audio files and just share me the link.