In an earlier post we mentioned the possibilities to filter vuvuzelas during FIFA 2010 Worldcup via Logic Express 8. But there is a little problem with it since this software wants to be bought. You can get this software for about 40 US$ at Amazon, but there is a cheaper way if you own a mac.
Garage Band is delivered with newer Macintosh Computers for free and also can be used to filter the vuvuzela sounds from your TV Signal.
German blog Imrich has posted a free download for vuvuzela filters on Garage Band you can use for upcomming football matches. I am sorry to say i could not test that solution because i am working on windows.
All you have to do is to connect your line-in of your mac with the headphone-out of your TV and choose “Line-In (integrated)” as audiosource.
The author is this filter mentions not all of the noise can be filtered because of some instruments not beeing a perfect b flat, but i think this solution is a good start for free 
The FIFA Worldcup will take four more weeks, so i think more solutions will be found!
