How is orchestral music composed?
In classical music, composers have historically orchestrated their own music. ... In musical theatre, the composer typically writes a piano/vocal score and then hires an arranger or orchestrator to create the instrumental score for the pit orchestra to play.
What are the components of an orchestra?
The typical symphony orchestra consists of four groups of related musical instruments called the woodwinds, brass, percussion, and strings (violin, viola, cello, and double bass).