Listen to Petra Thai Thanai - Viruttam online. Petra Thai Thanai - Viruttam is a Carnatic language song and is sung by M.S. Subbulakshmi and Radha Vishwanathan. Petra Thai Thanai - Viruttam, from the album Suswara Manjari, was released in the year 1979. The duration of the song is 6:28. Download Carnatic songs online from JioSaavn.