For those of you who don't kn0w, the TB 303 is a well-renowned synth used almost everywhere. Some examples of where this synth is found are
Daft Punk-Da Funk
Skrillex- My Name Is Skrillex
...That's all I could find. For more information you'd probably want google.
This song was mostly experimental, checking out some sounds. This isn't the first time a 303's been used in dubstep, but damnit, I wanted to. This song was really inspired by Midnight Request Line, and a few of Skrillex's songs, and the 303 itself, what a big impact it had, blah blah blah.