lol
my grandad learned the "do re mi's" when he was a kid. He came from a musical family. His father, my great grandad, won the champion fiddler of the entire state of Mississippi competition (2 or 3 years in a row). I still have the medal he won for that...it's made of 14 carat gold. Anyway, I have a lot of my grandads song books and they are scored in shaped notes. The lines and staff and everything is the same as traditional musical notation but instead of a round note on the line or space, the note has a shape.
do=a triangle
re=a half circle
mi=a diamond
fa= a rectangle
so=a round music note
la=a diagonally cut half rectangle
ti=a upside down triangle with a rounded top
my grandad could take a shaped not songbook and sing a melody to a song he had never heard before. He would sing it like "do mi ra do ra mi so so la mi ra do ra mi " after he "do ra mi'd" the melody a few times he would sing the words.
Man, the generation that could do that is dying out. If my grandad was still alive he would be 106 years old now.