At present im in the process of transfering some of my vinyl collection onto my pc so that I can burn the tracks to disc for use with cd players. So far i've just been using audacity as the recording device, having connected the output of my mixer into the mic input on my pc and saved each track on a seperate hard drive. Most of the tracks i've done so far sound quite good as they are but some of them have a little crackling through them due to wear and tear. Does anyone know if there is a feature that can be used to clean up the tracks in audacity? If not are there any alternative free programs out there that would do the trick?