Even though the title is unbiased, post concentrates on the effort of Dr. Kamala Hassan's flick Manmatha Ambu. The movie revolves around Love and Kamal, he sang a beautiful song "Neela Vanam" for the same. Music direction is done by Devi Sri Prasath, who never leaves his ugly band, "Petta" drum beats.
This song is dominated by Kamal's voice (I suspect his hand on music too), to say it will have no "thara", "thapetta", "band music" or "unlawful drum beats" simply no stains of DSP. Kamal's voice rule that 5 minutes with calming violin background.
Have you noted the specialty of this "reverse" picturising, the lip movement matches the song(even when is reversing). So what is it? they walked back or did he spelled back! You choose the answer by again watching it. Watch for the 3:00min portion till the end