Listen to Oo Mridule online. Oo Mridule is a Malayalam language song and is sung by Sathyan Anthikad and K.J. Yesudas. Oo Mridule, from the album Njan Ekananu (Original Motion Picture Soundtrack), was released in the year 1982. The duration of the song is 3:11. Download Malayalam songs online from JioSaavn.