《晋书·志·第六章》
至于全体合乐时，祇要识得律名尺寸，则器乐歌唱，都能合调。
至于都合乐时，但识其尺寸之名，则丝竹歌咏，皆得均合。
As for when the whole group plays together, as long as they know the name and size of the scale, both instrumental and vocal music can be harmonious.