now that you know the technical details...
take a track from a recording you've done (or any sound file, it doesn't matter), and put two copies of it on two tracks of a multitrack program. center them both. now offset one of the files anywhere from 1 to 50 milliseconds, and listen to the two tracks together. mute one of the files and listen again, to remind yourself of the original.
depending on the offset you choose, the sound will be mangled at different frequencies. sometimes it won't sound *bad*, just *different*. and sometimes it will be brutal.