How is mozart regularly described?

A prodigy

Explanation:

Wolfgang Amadeus Mozart was born in Austria and a son of Johann Georg Leopold Mozart, a famous German composer and violinist. Wolfgang Mozart, at a younger age of three, showed excellent abilities in creating music and came to be known as a was a child prodigy. Mozart could single out tunes on the piano and started composing music by age four. He became an excellent violinist and pianist at the age of six. Mozart and his sister Maria Anna toured all over Europe to play for royalty when both were young.    

a chromatic scale uses the twelve tones of the octave, while a regular scale only uses eight, or seven different notes (as the first note is played twice)