When it comes to describing a group of musicians formally working together to create a harmonious sound, there are several different synonyms to choose from. One common phrase is "music ensemble," which refers to a group of performers playing together. Another term is "orchestra," which typically refers to a larger ensemble that includes various instruments such as strings, brass, and percussion. "Band" is also a widely-used synonym, particularly when referring to a group of musicians that play contemporary genres such as pop, rock, or jazz. "Choir" is another option, which typically refers to a group of singers performing together. Lastly, "symphony" is another term often used to describe a musical organization that specializes in playing orchestral works.