There are many descriptions of the computation of MFCC vectors in the literature. They are, of course, the same conceptually but differ in a myriad of details including but not limited to the boundaries of the filters in the filter bank, the use (or not) of pre-emphasis, and the parameters of the DFT and the DCT transformations.
The documentation of the computation of MFCC by AudioLocalMeasurements is, shall we say, spare. In order to make use of Mathematica's MFCC vectors one obviously needs to know what when into their computation. These details should be provided in sufficient specificity that one can reproduce the MFCC output of AudioLocalMeasurements using more basic Mathematica functions such as Log, PeriodogramArray, Fourier, FourierDCT, etc. Perhaps there is someone in this community who knows these details and would be willing to post them.
Thanks in advance for their help.
Cheers, Scott