《淮南子·天文训》
在所有的十二律中，黄钟定宫音，太蔟定商音，姑洗定角音，林钟定徵音，南吕定羽音。
凡十二律，黄钟为宫，太蔟为商，姑洗为角，林钟为徽，南吕为羽。
Among all the twelve rhythms, the Yellow Bell is used to determine the tonic, the Tai Cu to determine the commercial tone, the Gu Xi to determine the horn tone, the Lin Zhong to determine the micro tone, and the Nan Lv to determine the feather tone.