唐代俗乐二十八调体系产生之后,随之衍生出“中管调”这一较鲜为人知的旁系,它和俗乐调在相当长一段历史时期中同时存在和得到应用。关于“中管调”的问题,在以往的学术讨论中,虽然偶尔有所提及,然而对于它的成因、学理和实践等深层次问题不见有专说。本文将围绕这样一些问题作为专题研究而系统地深入探讨。 Following the birth of the twenty-eighth system of folk music in the Tang Dynasty, a relatively unknown parallels derive from “Zhong Guan Tuan”, which is coexistent with vulgar music in a long historical period . As for the issue of “regulation and control” in the past, although it was mentioned occasionally in the academic discussions, there were no special reports about the deep-seated problems such as its causes, theories and practices. This article will focus on such issues as a thematic study and systematic in-depth discussion.