"Clear" and "turbid" in Chinese phonology

A key concept in traditional Chinese phonology is the distinction between "clear" (qīng 清) and "muddy / turbid / murky" (zhuó 濁).  Although it is mainly applied to the sounds of language, the qīng 清-zhuó 濁 distinction also has applications / implications for music. Roughly speaking, the linguistic and musical correlations are qīng 清 ("clear; […]