Working with audio on a daily base, i've been using SoundEdit from version 1 because of it's great interface. It simply is the BEST audio editing software around. tested dozens of simular but nothing can compete. It's so easy to shape your audio once you know all the shortcuts, It truly is my 3rd hand. There are a few annoying features like not being able to cancel screen build-ups but once you know how to work around that, there is no comparison. OSX lacking something like SoundEdit is the main reason i'm still working on OS9.