Final answer:
The term that refers to the specific group that performs a piece in music is ensemble. An ensemble is a group of musicians who perform together and can refer to various groups like a band, orchestra, choir, or chamber ensemble.
Step-by-step explanation:
The term that refers to the specific group that performs a piece in music is ensemble. An ensemble is a group of musicians who perform together and the term can refer to a variety of groups such as a band, orchestra, choir, or chamber ensemble. Each specific type of ensemble has its own unique characteristics and instrumentation.