A boys' choir is a one made up of boys who have yet to begin (or are just in the early stages of) puberty and so retain their high-pitched childhood voice.[1] Members are known as trebles ("boy sopranos") or meanes ("boy altos"), depending on their range. Boys' choirs of churches or cathedrals on both sides of the Atlantic may sing alongside and train with men, who provide the tenor and bass parts, in a tradition that dates back traceably to the 7th century, in the case of York Minster, and probably much further.