The vuvuzela is a long horn popularly blown by spectators at football matches in South Africa.
The Devuvuzelator plug-in is intended for illustrative educational purposes.
Here is a sequence of steps that you can use to see how the Devuvuzelator works:
· Download and install Audio Hijack Pro · Download the plugin and copy the devuvuzelator_macUB.so into the folder /Library/Audio/Plug-Ins/LADSPA (you may need to create the "LADSPA" folder) · Open the Safari web browser and go to iPlayer, start your radio/TV playing · Open Audio Hijack Pro and tell it to hijack the Safari audio. Then in the "Effects" tab click and choose the effect from the menu option LADSPA > Queen Mary University of London > Devuvuzelator · After about a second the filter should kick in. You can change the options for the amount of reduction if you like.