What is allegro deciso?

Allegro Deciso is a musical term that refers to the speed and character of a piece of music. It is an Italian term that means "fast and decided". Allegro Deciso is usually used to describe a piece of music that is fast-paced and has a strong, determined character. It is often used in orchestral pieces, such as symphonies and concertos, as well as in opera and other vocal music.