Symphonic music, also known as classical music or orchestral music, is a genre of music that is performed by a symphony orchestra. The symphony orchestra is composed of various musical instruments, such as strings, woodwinds, brass, and percussion. The music is usually complex, melodic and often uses multiple themes or movements. Other synonyms for symphonic music include classical music, orchestral music, symphonic orchestration, grandiose music, and instrumental music. The genre has been popular for centuries, and composers such as Mozart, Bach, and Beethoven are considered some of the most influential in classical music history. Symphonic music is often used in film, television and theatre.