http://www.melaman2.com/cartoons/looney/themes/looney_tunes_opening3.mp3
This is the original file, I suppose.
Even the checksums match lol, so the file on the contest Web is untouched from this file.

The Web design with changing colors and Jons obsession with pigs (the opening is from Porky Pork, in GitHub he quotes Spider pig from Simpsons) clearly refers to a tool called Spek (spectogram analyzer) which also has the .cc domain (spek.cc) and is also from Germany as Jon is.
However, you can find nothing as the file is clearly untouched from the source file found in the web.

I suppose that you should focus at the .png file but "dont for get the music" as the contest Web states.