Abstract
Based on 182 samples, this study constructs Imakan multi-modal database, which combines computational musicology and acoustic phonetics, and quantitatively reveals the structural transformation of intangible cultural heritage in contemporary protection: under the dual effects of “imitation frustration” and “policy discipline,” Imakan has a significant decrease in information entropy, which is manifested by a significant decrease in the coupling degree between language and melody and a high convergence of scales to five tones. The essence of this evolution is the adaptive reconstruction of oral tradition in the face of inheritance dilemma, that is, at the expense of artistic complexity in exchange for inheritance stability, thus establishing a new digital empirical paradigm for the study of intangible cultural heritage evolution in this field.