What are these? Or rather, more importantly, how did we get these?

[audio:http://www.boiledbeans.net/wp-content/uploads/2012/01/bd3aeaf14e8485828337dfe75c498b69.mid] (link)

[audio:http://www.boiledbeans.net/wp-content/uploads/2012/01/13a1be29dce845c3e45a72da10930558.mid] (link)

[audio:http://www.boiledbeans.net/wp-content/uploads/2012/01/26e57cfc37fcc87ecf07009b79d7e50b.mid] (link)

Here’s a clue:

(This question will be modded on the 24th)
Cracked by: Bharath, rickde, Rogi, jowens, Manish Achuth, Raghuvansh, shrik, Ananth and Shwetha Maiya