I think most of us have at one point or another yelled in a large building or tunnel and heard our voice echo. This effect will add that kind of sound to your music, and if timed properly, it can greatly enhance the overall feel.
Here is a little demonstration of the echo effect. This is a little beat I made with a boring chord section.
So, the chord section is too basic. Now, I could go and repeat the notes, or change their velocity, but I just added the Guitarix echo plugin.
As you can tell, that echo really adds to the chord section. The Guitarix plugin had two inputs. One was the release time which changes how long it will repeat for. The other input was the time which just changes how fast or how slow it echos. With just a little playing around you can get your instruments echoing in no time.