Listen to Kal Raater Bela Gaan Elo-Swapan online. Kal Raater Bela Gaan Elo-Swapan is a Bengali language song and is sung by Swapan Dasgupta. Kal Raater Bela Gaan Elo-Swapan, from the album Gaan Elo, was released in the year 2009. The duration of the song is 5:36. Download Bengali songs online from JioSaavn.