What term refers to the collection of pieces a choir is prepared to perform?

The term that describes the collection of pieces a choir is prepared to perform is "repertoire." This word encompasses not just the songs that a choir currently knows, but also includes various styles and genres that the choir can perform confidently. A choir's repertoire reflects its skill level and the diversity of its offerings, making it essential for concert planning and showcasing the ensemble's capabilities.

The other terms—playlist, catalog, and selection—have different connotations. A "playlist" often refers to a specific order of songs intended for a particular performance or event, while "catalog" suggests a more extensive list of available works, not necessarily linked to ongoing performance readiness. "Selection" can refer to a specific piece chosen for a performance but does not encompass the full range of prepared works in the same comprehensive way that "repertoire" does. Thus, "repertoire" is the most accurate and widely recognized term for this context.