Braille music is a Braille code that allows music to be notated using Braille

Braille

The Braille system is a method that is widely used by blind people to read and write, and was the first digital form of writing.Braille was devised in 1825 by Louis Braille, a blind Frenchman. Each Braille character, or cell, is made up of six dot positions, arranged in a rectangle containing two...

 cells so that music can be read by visually impaired musicians. The Braille music system was originally developed by Louis Braille

Louis Braille

Louis Braille was the inventor of braille, a system of reading and writing used by people who are blind or visually impaired...

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Braille music uses the same six-position Braille cell as literary braille. However braille music assigns an entirely separate meaning to each braille symbol or group of symbols, different from literary braille, and has its own syntax and abbreviations.

Almost anything that can be written in standard print music notation can be written in braille music notation as well.