Try this simple exercise: go to your music library, pick a song, and play the first 3 s of it. Give yourself 1 point if you can manage to sing or hum at least the next 5 s of that song. Do this for 20 songs. How many points did you score? We would not be surprised if it is more than 15. Now, think about what you just did. You effortlessly recalled the pitch, rhythm, and maybe even the lyrics of more than 15 songs in a short amount of time. That is a lot of data you managed to summon from your brain, just like that!
Our brains possess a remarkable ability to make, store, and retrieve memories of music, even when we are not aware of doing so. For example, if you hear a catchy song, you will most likely be able to remember parts of it a few days later. After hearing it several times, you might know it by heart. Think about how much more effort it takes to learn information from a textbook, or to remember the details of day-to-day events in your life.

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Go to source: https://kids.frontiersin.org/article/10.3389/frym.2017.00005