Bela Bartok (1881-1945) was an Hungarian composer.
Regarded as a child prodigy, he studied music at the Budapest Conservatory later working with Kodaly in recording and and transcribing local folk music for a government project.
This led him to develop a personal musical language combining folk elements with mathematical concepts of tone and rhythmic proportion. His large output includes six string quartets, a ballet "The Miraculous Mandarin" in 1919, which was banned because of its subject matter, concertos, an opera, and graded teaching pieces for piano.
He died in the US having fled from Hungary in 1940.