Listen to Otaa Naba Premer - Biswamangal online. Otaa Naba Premer - Biswamangal is a Bengali language song and is sung by Dr. Devajit Bandyopadhyay. Otaa Naba Premer - Biswamangal, from the album Bangla Theaterer Gaan, was released in the year 2005. The duration of the song is 1:19. Download Bengali songs online from JioSaavn.