Vuvuzela Filter

If you're into digital audio processing and World Cup soccer, this is the link for you.  I had to hear about a half dozen different commentators say "vuvuzela" before I figured out what they were saying.  Also, is the vuvuzela related, etymologically or otherwise, to the manzello?

Update: this answers the question, "what would it be like to watch a World Cup match via Twitter?"