A memoir can be based upon a person or even an event. They are most commonly used after a person has passed or went away somewhere. They are used to help keep memories and celebrate the person. Some must haves can include photos,words,or even things they enjoyed.
I'm guessing the central idea of "the value of music that tickles the brain" is that music makes you smarter, increases IQ level, makes language development smoother, enhances creativity, and increases the reactions in your brain to work faster. Music has many benefits and these are just a few. You can always also just research on the topic of music effects on the brain online. Hope it helps!
