Listen to Petra Thai Thanai online. Petra Thai Thanai is a Carnatic language song and is sung by M.S. Subbulakshmi and Radha Vishwanathan. Petra Thai Thanai, from the album Guru Samarpanam, was released in the year 2005. The duration of the song is 6:24. Download Carnatic songs online from JioSaavn.