Why are a piano’s black keys arranged in groups of three and two?
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I’ve scrolled through some of this and have yet to see the obvious answer. The piano’s black keys are arranged in groups of 2s and 3s so you can find your way around the keyboard. Simple as that. You can go into the hertz and the major scale and blah blah blah, it’s so that each key looks unique.
Test it. Hold a book up and cover all of the black keys so that all you can see is the white keys. You’ll instantly realize that unless you have a perfect ear, you’ll have no idea which key is which, because all the white keys will look exactly the same. Thus, the black keys also need to be in different groupings so that every single note looks unique from one another.
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