Listen to Biraha Modhur Holo Aaji online. Biraha Modhur Holo Aaji is a Bengali language song and is sung by Unmana Dutta and Rabindranath Tagore. Biraha Modhur Holo Aaji, from the album Arup Bina Unmana Datta, was released in the year 2010. The duration of the song is 4:54. Download Bengali songs online from JioSaavn.