Originally Posted by bsqueezer
Audacity is a free program, Reaper is another one.
While Reaper has an indefinite trial period, it's not technically free--you're supposed to buy a license sooner or later ($200 commercial/$50 non-commercial). It's great that you can evaluate the full version to see how it works for you. This is coming from someone who's tried Reaper for a while and should pony up for a license soon.
That said I think Audacity is simpler/less confusing, especially for simple audio file uploading.
If you want to convert files to mp3 be sure to download & install the LAME mp3 encoder
(should be on the Audacity download page). Also, if there are issues with the stock soundcard drivers (pops, cracks, latency) you may want to download the asio4all