He choose to use the C, D, E... system that is not the norm (the norm, maybe not in US I guess, is Do, Re, Mi...)
And then create graphical representation of words starting with those letters.
Except this works only in english.
How a portuguese speaker for example would associate the dot thing with D or Re? It looks like neither, at most it looks like a dot (that in portuguese is "ponto", thus starts with a P)
Or the above and below? Below in portuguese is "abaixo", thus starting with a A, so you have to teach someone that A actually means B.
To me this new notation might make sense in english (maybe), but in other languages is even more arbitrary and silly (and tedious to hand-write)