Audacity
Audacity is a cross-platform, multi-track recording software. Which means that it is like garage band in the fact that it will layer sounds, but it works on Windows computers. It doesn’t have all of the tools and plug-ins and is less visually appealing than other audio software. I have done my fair share of audio work using audacity, but only for importing audio files and exporting them as mp3s. There are a few plug-ins on their website like loops and an mp3 encoder. The loops are built for Windows platforms, so I can’t demonstrate them on my mac.
You could just use the program to record voices or an acoustic instrument through the microphone on your computer. Or import a soundtrack from another source.
Here is a link to download the software.
http://audacity.sourceforge.net/download/
Here is a link to download additional plug-ins for Audacity (be sure to download the right plug-in for your operating system).
http://audacity.sourceforge.net/download/plugins



