When MATLAB uses audioread, an error is reported: Error using which Must be a string scalar or character vector.

solution: because in the code clean_name = strcat(mix_name_[1], '.', 'wav'); in this sentence, the use of the [] for the type cell , and use the {} , the type of the string , it needs to be [] to {} .
can be read normally after correction, the code is as follows:

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