A group of nine musicians that play together is called a nonet.
quartet
band, orchestra, combo
orchestra
A group of four musicians or singers are called a quartet. A group of five musicians or singers are called a quintet.
A group of three musicians is called a trio.
quartet
A group of musicians playing different instruments together is called an orchestra. The Greek word for orchestra is orchḗstra. In Greek the word meant the space in front of the stage usually reserved for the choir.
A band or an orchestra
band, orchestra, combo
a sextet is a group of six musicians playing together.
The general term for a group of musicians, regardless of its size, is an "ensemble."
A quartet.
orchestra
A group of four musicians or singers are called a quartet. A group of five musicians or singers are called a quintet.
A group of three musicians is called a trio.
A group of five musicians is a quintet.
A group of musicians are usually called a band or a symphony, but it depends on the instruments and how many musicians there are.