All of the following are vocal genres EXCEPT

An opera is a theatrical work that combines singing, orchestration, and sometimes dance, featuring vocalists as an essential component of its performance. It is a well-known vocal genre characterized by its use of arias, recitatives, and choruses, making it a clear example of vocal music.

A motet is a polyphonic choral composition that is often sacred in nature, featuring vocal parts without instrumental accompaniment. It is a traditional vocal genre that highlights the capabilities of the human voice in intricate harmonies and counterpoint, firmly placing it within the realm of vocal music.

A mass is a form of sacred musical composition that typically includes various vocal parts, often performed in a liturgical context. It is composed specifically for congregational singing or choir performance, establishing it as a vocal genre that plays a significant role in religious ceremonies.

A cantata is a vocal composition with instrumental accompaniment, usually consisting of several movements and designed for performance in a concert setting or as part of a church service. It often features solo singers and choirs, making it a recognized vocal genre in music history.