I have never seen a practical purpose for an audio visualizer. Even back in the day when I saw my first one while using Windows Media Player, I didn’t see the point. I’ll be honest, that hasn’t changed one bit. But that does not take away from my surprise (and joy?) at discovering that the iTunes player has one. Since I didn’t know, I figured you might not know either. Will I use it? Probably not. Will you use it? I doubt it. But who cares, it’s just fun to know about, like back in 1999 when you saw one for the first time.
First you need to use the View menu to show the visualizer.
Then you get to choose the type of visualizer. Some are more nostalgic than others.
Then you get to see cool things like this.
Then after 58 seconds, or so, of visualizer you get bored (if you’re young) or get a headache (if you’re older) and decide it is time to hide the visualizer.