[Shroud]

Wimbus wrote:

Is there any other way? (That does not go against the community rules of course)

You can use C3 CON Tools.

Select the Phase Shift converter. This will convert an encrypted mogg audio file into a single-track audio file. You can ignore the rest of the generated files.

You can then us Magma to open the CON, replace the mogg with the single-track audio and re-build the CON.

I am not sure but you might also replace the audio directly using C3 CON Tools.