Dun Dun Dun is dramatic sound right before something
major happens. urbandictionary.com: Used immediately
after a shock revelation, in the style of a 1940's
or 50's movie.
The file includes 7 different "Dun Dun Dun" sounds.
Format: Wav, 44.1 KHz, 16 bit.
License: free for commercial use under "Creative
Commons Attribution 4.0 International Licens".