This video was found on
Google Video or YouTube
thevideosense.com is not affiliated with Google. For more videos please
check Google Video or Youtube
How to use Audacity Freeware to remove 80% of all unwanted noises from audio tracks.
Quite good at removing 50hz hum, ripple, buzz, 60hz hum, rumble, noise and other unwanted noise.
This is not a perfect solution but the results are quite good.
http://www.acomputerportal.com