Quote:
Originally Posted by adXok
Here comes the bad design part though... because the standard piano keyboard is a mess!
By pure visual means, on the piano keyboard we've got two point (keys) of symmetry (well, because there are two different rows of two different group of keys by colour, shape size and position in space!).
One point of symmetry belongs to the key for the note D, and the other (on the black keys) is 6 (= 12 : 2) "semi-tones" ("half-steps"?!) above (or below), resulting on the key for the note Ab (G#). Well it is the black one... in the middle... of the sub-group of three black keys.
Symmetry - video link (only about D though)
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That is interesting. Thanks. It never struck me before.