boys' choir

A boys' choir is a choir primarily made up of choirboys who have yet to begin puberty or are in the early to middle stages of puberty and so retain their more highly pitched childhood voice type. Members of a boys' choir are technically known as trebles and often termed boy sopranos," although occasionally some boys sing in the alto range. Some boys' choirs of churches or cathedrals are further supported by older male voices singing tenor and bass; these singers are sometimes former choirboys.