These were recorded off the videos, so sound-effects were unavoidable.
Just in case people wanted MP3s of the songs, and didn’t want to wait until they (hopefully) release a soundtrack.
To the ones not "in the know": Dr. Horrible’s is 40 minute musical about Dr. Horrible (Neil Patrick Harris) who aspires to be in the evil league of evil, his rivalry with his arch-nemesis: Captain Hammer (Nathan Fillion), and also about his secret love for a girl from his laundromat.
It was helmed by Joss Whedon, whom I know you all know from Buffy and Firefly fame, and had done the "Buffy the Musical" special Buffy episode.
The music in this? Even better than Buffy the Musical…and I loved Buffy the Musical.
I really hope they make a soundtrack. I’d be first to preorder, man.