The Secret Musical Code of East Asia
While most of the world uses staff notation with lines and dots, millions of musicians across Asia use simple numbers to represent melodies. This system turns complex sheet music into a sequence of digits that anyone can read instantly.
This notation uses the numbers one through seven to stand for the notes of a major scale. It was originally developed in France during the 19th century but found its greatest success across Chinese-speaking communities. Many learners prefer it because it removes the visual clutter of traditional Western musical staves. It is a brilliant example of how a simple shift in format can make music theory much more accessible.
Source: Numbered musical notation