a music ensemble which features only one player per part is called a ????

Answer 1

Chamber music is a form of classical music, written for a small group of instruments which traditionally could be accommodated in a palace chamber. Most broadly, it includes any "art music" that is performed by a small number of performers with one performer to a part. The word "chamber" signifies that the music can be performed in a small room, often with an intimate atmosphere. However, it usually does not include, by definition, solo instrument performances.

Answer 2

If only the Soprano, Alto, Tenor, and Bass, its a quartet.

Answer 3

A jam session