Notes
Musical Alphabet
7 white keys: A B C D E F G
5 black keys, in groups of two & three
Between the two black keys is always the note D
Accidentals
Enharmonic Equivalence
Overlap in note names
Black keys are always
but some white keys can also be
This is because the keys B & C, and E & F are adjacent,
there are no black keys separating them.