Today I wanted to download something from Soundcloud, but the download link was disabled. What I used to do is view the source, and then find the link to the stream, and just download that. However, these days they've hidden it behind a pile of Flash and Javascript. I spent a while dicking around with the code behind it and eventually decided I'd see if someone else did it, and of course, a million people already did it a million different ways.
If I wanted to figure out how to do it from scratch, though, where would I start.