Rezound was pretty great for editing long sound files into individual samples and loops. It would allow a loop to be playing whilst the beginning and end of the loop was being adjusted. Not only did this sound really cool, it was also very fast because the left mouse button was for the start of the loop and the right mouse button was for the end of the loop. The current issue is that Rezound has not had a new release since 2007 and it is quite difficult to get it to run on a current system. I was unable to do so after a multitude of attempts. If Rezound has been abandoned, someone please save it or create an application that can do what Rezound was able to do.