Audio players usually feature a sophisticated multimedia interface full of buttons, lights and other types of eye-candy. But there's always an exception to the rule; in this case, it's foobar2000.
foobar2000 is exactly the opposite of what you would expect in an audio player. It features the simplest, most minimalistic interface you'll ever see in this kind of program. But don't get me wrong, because this doesn't mean you don't get any interesting functionality.