visualization bars

visualization bars
How do you call these bars are, apparently with the music?

It's one thing to display. I need it for an individual, but Everytime I seem Look for it I call it "music bars" and nothing gets in the search bar on it. I really want the correct name. Maybe this is so I can probably get this time. Name Only thank you:]

that's all I ever heard, it is called a music bar

MIDI Visualization Bars (2009)