In oracle bone inscriptions, new and old "xi", means ancient and modern music; "gu" means blind people; "yong" and "mei" refers to ode and refined poem respectively.
卜辞中有"丐",当读为瞽,指盲人。
On Tsunzi s Cheng Xiang from History and Culture of the Blind:More Comments on Cheng Xiang for Folk Song Style;
从瞽史文化看荀子《成相篇》——兼评《成相篇》为民歌体