Darren Korb sampled a song for that particular track on the Bastion soundtrack. This is the thing he sampled. It's called Hipstra.
This song has other elements that I recognized during the stream. The violin sounds super familiar. I feel like its some anime or video game. Anyone know what it is?
EDIT: I'm no music expert, why does that violin remind me of the violin in Madoka? I felt like I knew what it was going to sound like during the stream when it first started. That 0:37-0:50 on that Hipstra track is killing me right now.