Should you ever be possessed of the need to explain it quickly, here’s the TV-news-sound-bite way to do it:
In music’s all-important, major scale the important notes are the white
notes on a piano. But; when laid out in a line like that, they are hard
and slow to play, as:
It’s an honest-to-goodness elitist, albeit inadvertent, conspiracy.
So so does one fix it?
First, you move the keys around a bit.
If you stack them so they are closer together, and especially put notes that usually are played together, in various combinations, close together.
Added bonus #1: often they can be played with one finger.
Bonus #2: this also makes the fingering consistent, so you need only learn one fingering, not twelve.
e can put an on extra set of keys on the other side to make them easy to reach. Thus automatically springs into existence a "Sharp" and a "flat" section, because this thing is built around music theory.
That's the simple, powerful idea - just move the keys to where they are more reachable, useful and one makes far less mistakes.
And that's why I'm so keen on the jammer: it's simple enough for even yours truly to understand.