A free program you can use for recording on your PC is Audacity. You can download it at www.download.com
. There is a search feature there, and you just type in "Audacity." It uses the existing sound card in your computer.
All you will need to BUY is a cable to connect the 1/4" mono "out" jack on your Roland to the 1/8" mic/line input on your computer (or a 1/8 to 1/8 with a 1/4 adapter).