A Quartet
a band, an ensemble, or an orchestra
An ensemble refers to the number of musicians in a group.
The general term for a group of musicians, regardless of its size, is an "ensemble."
A band, group, ensemble, orchestra, trio, quartet, quintet, etcA group of musicians are usually called a band or a symphony, but it depends on the instruments and how many musicians there are.
Musicians.
The collective noun is an ensemble of sting musicians.
I think you meant 'when' so this question is in the wrong category... But when four musicians play together its called a quartet.!
A group of four musicians or singers are called a quartet. A group of five musicians or singers are called a quintet.
A quartet
The simple "orchestra" will have the most musicians.
They can be called an ensemble, a choir, or a group.
Still called a band!! from wiki: Band (Music) A musical ensemble is a group of two or more musicians who perform instrumental or vocal music.