《梦溪笔谈·乐律二》
大致北方人的服饰器物多采用唐代的风俗，这种音乐怀疑也是唐代音乐的残留。
大凡北人衣冠文物，多用唐俗，此乐疑亦唐之遗声也。
As a whole, the clothes, utensils, etc. of the northern people are mostly based on Tang traditions; I suspect that these music are also remnants of Tang music.