LOOKING FOR A SOUND RECORDING PROGRAM FOR COMPUTERS

[Jixby Phillips]

I have heard of a program that my friend with a mac has where you simply hit record, and it records any sound that is going on on your computor. Meaning if you are playing an mp3 AND an aim window makes a noise, it records both sounds onto the file. I guess i'm looking for something similar to that. The purpose is to record sounds from DVDs and other movie files. Is there such a program for windows, and is it free and easy to get? THANKS