How to filter Vuvuzelas using GarageBand
If you’ve watched a Football World Cup match recently, you must have noticed the sounds of the Vuvuzela, an African trumpet that makes a stadium full of football fans sound like a beehive on steroids. With up to 120db the Vuvuzelas‘ sound can be quite literally deafening.
Watching the matches from the comfort of your home, a bit of smart audio processing can drive the buzz away. If you’re the proud owner of Logic Express, a software package for audio pros, there ‚s a German blog post describing the process. However, there’s a cheaper way to do it: If you bought a Mac in the last few years, it very probably came with the iLife package, and thus there should be a copy of GarageBand lurking around somewhere in your Applications folder.
Click here to download my homemade Vuvuzela-filter for GarageBand: Vuvuzela-filter
A few hints: You don’t need to pres the record button, but monitor mode must be switched on for the Vuvuzelafilter channel. Connect the line in of your Mac to the headphone jack of the TV set and select line in as the input in the Preferences dialogue of GarageBand. If the sound is tinny, you have to turn down the volume on the TV set. You might want to connect external speakers to the Mac’s headphone jack if the internal ones aren’t loud enough. The filter will not get rid of all the noise, quite probably because there are some instruments that aren’t tuned to b flat. To verify that the filter works try switching it off in the channel information preference pane.
Update (June 15 2010): Most of the filters that are now available on the internet do not filter the Vuvuzelas’s sound particularly well since they do not cover all of the frequencies involved. An improved version of my filter for GarageBand is here: Vuvuzela-Filter v2 ©Daniel Imrich