Have you ever had a song stuck in your head? Hearing music in your mind without any actual physical sound waves involved is a skill called “audiation.” Pretty much all of us have it to some degree. For example, when I ask you to—without singing it out loud—think about the song “Happy Birthday,” your brain can probably recall it for you and you can hear it playing in your head. Maybe it’s your own voice you hear, or a family member’s, or a big crowd of people.

Well, what if I asked you to hear “Happy Birthday” in your head… and at the same audiate “Twinkle Twinkle Little Star” as well? Can you do it? I can’t either. Suddenly we’ve dropped off from a nearly universal, inborn ability to a very rare skill.

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