The main changes are:
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The newer process (HENV) Envelope correlation [2023] allows to compute the amplitude envelope using the (complex-Morlet) wavelet transform approach, not only Hilbert transform as in the previous process (AEC) Amplitude envelop correlation.
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Symmetry in the connectivity matrix. When orthogonalization is used the amplitude envelope correlation is not symmetric. In the previous version (AEC) the correlations A×B and B×A were averaged with their sign. According to @hossein27en, this can result in strong correlations cancelling each other. For this reason HENV, obtains the absolute value of the correlations before averaging them. See:
- In a recent update, August 2023, the orthogonalization and correlation were improved in HENV top avoid numerical errors. PR #632