Song download link extraction from the web (how it works)

Hey. I stumbled upon this website which lets you search for a song by its name, and then displays its download link. It's cool, but I wanted to know how it worked. Sure, this guy did a lot of work, but when asked, he refused to answer.

Okay, so breaking it down. I did a check. First, the search sends a request to search.php?item=variable which throws data in JSON format ( http://cdn2.mysong.ga/search.php?term=test ).

The way it is set up : the variable names, etc. it looks like he's using some API to search, after that the download link is ( http://cdn1.mysong.ga/get.php?which=1&tt=yo&source=b ), which directly downloads the song. the 'which' here is the song listing in the search.

And, I found out that there are two sources : source 'a' and 'b', songs in source a are hindi/bollywood songs, and source b are 'world music'.

If you guys can find out which API / how this whole thing is working.

P.S. : I need a similar functionality in one of my project.

API Availability : Spotify / Rdio / other APIs aren't available in India, in addition to that, the websites allows you to download music for free.

Website URL : http://mysong.ga/