Listen to Vignanathai - 1949 online. Vignanathai - 1949 is a Tamil language song and is sung by N. S. Krishnan and T. A. Madhuram. Vignanathai - 1949, from the album Nallathambi, was released in the year 1949. The duration of the song is 3:17. Download Tamil songs online from JioSaavn.