short snippet from an email I received today
Vuvuzela Filter EyeTV 3.4 Special Edition For a limited time only A special edition of EyeTV 3.4 software is available during the 2010 FIFA World Cup that offers a new feature called the “Vuvuzela Filter”. This filter gives you the option to dampen the buzz of vuvuzela horns in the stadium during live TV broadcasts; it can be quickly switched on and off at any time during the game. To use the filter, control click to bring up the contextual menu in EyeTV. Click here for a quick demonstration of the Vuvuzela Filter in action. http://downloads2.elgato.com/elgatonews/EyeTVWithVuvuzelaFilter.mov
They need to add a second bandpass filter to kill the harmonics. The video only gets rid of the lower frequencies (to my ears).
From the internets ;-)
Use the EQ as a bandpass filter to get rid of the annoying frequency around 233 Hz and the corresponding harmonics (466Hz, 932Hz, and 1864 Hz)
