A(n) is an operatic number involving three or more leading singers.

Ensemble

Explanation:

The musical group is usually not a big group. Various ensembles are formed by different music groups from different genres. There are many groups. For example, a jazz ensemble, a quartet or a trio.

The ensembles are organized, with leading singers and parts such as soprano, alto, tenor, and bass. In men's singing groups, there is also a mixture of tenor and base known as the baraton.

i think it's about 10 mins.

actually i think that's wrong, but i don't know how to delete this.

but who knows it might be right.

i think eddy chen is better.