There is a very nice FTP server viz
bangla.homeip.net:2121 for downloading bengali songs.
All you need to do is to open the website www. UltimateBangla.com create an account. (I mean register).
Then in Linux, select Connect to Server.
Select FTP (with login)
In server name, type bangla.homeip.net
user name: your username
Click on connect. You will be asked for the password. Type the password. You will find the newly mounted location in Places.
Open it and browse for the song. Alternatively, you can open www. ultimatebangla.com and goto "search" to find the song.