i've heard people talking about them and use them for vocal to make it sound better, i'm using cool edit most of the time, can i get this so call "compressor" free? or is it a hardware thing.
A compressor is a type of dynamics processor that “squeezes” a signal’s dynamic range—that is, it reduces the difference in volume, or level, between the loudest and softest parts of a performance. The process of reducing volume is called gain reduction. Properly applied, gain reduction makes a performance sound more consistent from beginning to end. For that reason, compression is a great remedy for a performance in which the levels fluctuate too widely.
You can purchase a 3rd party compression plug-in for CEP but a freebee might not do so well. If you go with a plug-in get something worthwhile.