The World of Salil Chowdhury

I have nothing against Yesudas. He is an exceptionaly gifted and highly trained singer and everybody knows Salil's weekness or rather preference for Yesudas in his Hindi and other language films. But what I can't understand is why Salil used Yesudas to sing this beautiful Bengali song and completely murder it with his atrocious Bengali accent. I haven't seen the film but it sounds like a sad song. I wonder how many people in the audience didn't laugh. Salil could easily have used Sagar Sen who already sang one song in this film with Sabita.
Incidently, Antara re-recorded Song# DB4 later in the 90's with wonderful arrangement.