《晋书·志·第六章》
将十二律序列错开吹奏，凡能将各律准确判断，不错一律的人，才可以接传严崇的学位。 
以律错吹，能知命十二律不失一，乃为能传崇学耳。 
Blow the twelve pitch series, and whoever can accurately identify each pitch, not missing a single one, that person can succeed to Yan Chong's position.