the twelve tone system
Schoenberg
Arnold Schoenberg, Austrian composer in 1921.
Braille was invented in 1821, though probably not in one day. Louis Braille was twelve years old when he invented the system, though it was not widely accepted at the time. The Braille system became the official reading and writing method of the National Institute for Blind Youth only six months after Louis Braille's death in 1852.
It is called twelve-tone technique, which is a form of serialism.
Schoenberg
twelve-tone system
the twelve tone system
the twelve tone system
the twelve tone system
twelve tone scale
It's the 12-tone system, where no one note of the western chromatic scale is used more or less than any other note.
Arnold Schoenberg.
Schoenberg was credited with it's creation, but Alban Berg started using Dodecaphony in 1912, three years before Schoenberg. Schoenberg did, however, innovate the twelve-tone system.
Atonal music
Arnold Schoenberg A+
Arnold Schoenberg A+