How to reconstruct audio signal from the spectrogram (output of assemble_coeffs)

[binarygo]

Hello

Thanks a lot for the nice package! I am looking for a "lossless way" to convert audio signal to spectrogram (in mel scale) and back to audio signal again. This seems to be a great solution.

However, after calling the assemble_coeffs() to construct spectrogram from CQT slices. How do I transform the spectrogram back to CQT slices (and thus backward() to audio signal again)? The overlap-add operation in the assemble_coeffs() seems to be irreversible.

Sorry for the dumb question, but it will be great if you could help on this. Thanks!