We reviewed the original Listen a while back, quite favorably, but that was a year ago. Which, by technology standards, means it's old. So out with that, and in with the new!
Listen: The Gesture Music Player, also known as Listen 2, and also just plain old Listen at this point, is essentially the same great app but with a great many developmental refinements. In other words, MacPaw has helped to refine the heck out of it. This new iteration is simpler than ever, plenty easy to use, more accurate with its interface, free, and out now.