What if real bats sang the old Batman theme song? Well, their "Nana Nanas" would fall outside the range of human hearing. But Ulrich Seidel and his Bat-organ give us something close.
Seidel reduced actual bat noises to human-audible frequencies, and then assigned the different bat notes to different keys on his keyboard (which he dubbed the Bat-organ). Then he arranged it into a theme sure to strike fear into the hearts of superstitious criminals.
The video was compiled by Sándor Seuntjens.
[via Improbable Research]