Hum Removal. Noise Removal using Audacity Freeware.
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